two version of R2R are hereHEADmaster

11 files changed, 5661 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/__init__.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/__init__.py
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/_suite.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/_suite.py
new file mode 100644
index 00000000..0da6503c
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/_suite.py
@@ -0,0 +1,276 @@
+"""
+Python representations of the JSON Schema Test Suite tests.
+"""
+from __future__ import annotations
+
+from contextlib import suppress
+from functools import partial
+from pathlib import Path
+from typing import TYPE_CHECKING, Any
+import json
+import os
+import re
+import subprocess
+import sys
+import unittest
+
+from attrs import field, frozen
+from referencing import Registry
+import referencing.jsonschema
+
+if TYPE_CHECKING:
+    from collections.abc import Iterable, Mapping, Sequence
+
+    import pyperf
+
+from jsonschema.validators import _VALIDATORS
+import jsonschema
+
+_DELIMITERS = re.compile(r"[\W\- ]+")
+
+
+def _find_suite():
+    root = os.environ.get("JSON_SCHEMA_TEST_SUITE")
+    if root is not None:
+        return Path(root)
+
+    root = Path(jsonschema.__file__).parent.parent / "json"
+    if not root.is_dir():  # pragma: no cover
+        raise ValueError(
+            (
+                "Can't find the JSON-Schema-Test-Suite directory. "
+                "Set the 'JSON_SCHEMA_TEST_SUITE' environment "
+                "variable or run the tests from alongside a checkout "
+                "of the suite."
+            ),
+        )
+    return root
+
+
+@frozen
+class Suite:
+
+    _root: Path = field(factory=_find_suite)
+    _remotes: referencing.jsonschema.SchemaRegistry = field(init=False)
+
+    def __attrs_post_init__(self):
+        jsonschema_suite = self._root.joinpath("bin", "jsonschema_suite")
+        argv = [sys.executable, str(jsonschema_suite), "remotes"]
+        remotes = subprocess.check_output(argv).decode("utf-8")
+
+        resources = json.loads(remotes)
+
+        li = "http://localhost:1234/locationIndependentIdentifierPre2019.json"
+        li4 = "http://localhost:1234/locationIndependentIdentifierDraft4.json"
+
+        registry = Registry().with_resources(
+            [
+                (
+                    li,
+                    referencing.jsonschema.DRAFT7.create_resource(
+                        contents=resources.pop(li),
+                    ),
+                ),
+                (
+                    li4,
+                    referencing.jsonschema.DRAFT4.create_resource(
+                        contents=resources.pop(li4),
+                    ),
+                ),
+            ],
+        ).with_contents(
+            resources.items(),
+            default_specification=referencing.jsonschema.DRAFT202012,
+        )
+        object.__setattr__(self, "_remotes", registry)
+
+    def benchmark(self, runner: pyperf.Runner):  # pragma: no cover
+        for name, Validator in _VALIDATORS.items():
+            self.version(name=name).benchmark(
+                runner=runner,
+                Validator=Validator,
+            )
+
+    def version(self, name) -> Version:
+        return Version(
+            name=name,
+            path=self._root / "tests" / name,
+            remotes=self._remotes,
+        )
+
+
+@frozen
+class Version:
+
+    _path: Path
+    _remotes: referencing.jsonschema.SchemaRegistry
+
+    name: str
+
+    def benchmark(self, **kwargs):  # pragma: no cover
+        for case in self.cases():
+            case.benchmark(**kwargs)
+
+    def cases(self) -> Iterable[_Case]:
+        return self._cases_in(paths=self._path.glob("*.json"))
+
+    def format_cases(self) -> Iterable[_Case]:
+        return self._cases_in(paths=self._path.glob("optional/format/*.json"))
+
+    def optional_cases_of(self, name: str) -> Iterable[_Case]:
+        return self._cases_in(paths=[self._path / "optional" / f"{name}.json"])
+
+    def to_unittest_testcase(self, *groups, **kwargs):
+        name = kwargs.pop("name", "Test" + self.name.title().replace("-", ""))
+        methods = {
+            method.__name__: method
+            for method in (
+                test.to_unittest_method(**kwargs)
+                for group in groups
+                for case in group
+                for test in case.tests
+            )
+        }
+        cls = type(name, (unittest.TestCase,), methods)
+
+        # We're doing crazy things, so if they go wrong, like a function
+        # behaving differently on some other interpreter, just make them
+        # not happen.
+        with suppress(Exception):
+            cls.__module__ = _someone_save_us_the_module_of_the_caller()
+
+        return cls
+
+    def _cases_in(self, paths: Iterable[Path]) -> Iterable[_Case]:
+        for path in paths:
+            for case in json.loads(path.read_text(encoding="utf-8")):
+                yield _Case.from_dict(
+                    case,
+                    version=self,
+                    subject=path.stem,
+                    remotes=self._remotes,
+                )
+
+
+@frozen
+class _Case:
+
+    version: Version
+
+    subject: str
+    description: str
+    schema: Mapping[str, Any] | bool
+    tests: list[_Test]
+    comment: str | None = None
+    specification: Sequence[dict[str, str]] = ()
+
+    @classmethod
+    def from_dict(cls, data, remotes, **kwargs):
+        data.update(kwargs)
+        tests = [
+            _Test(
+                version=data["version"],
+                subject=data["subject"],
+                case_description=data["description"],
+                schema=data["schema"],
+                remotes=remotes,
+                **test,
+            ) for test in data.pop("tests")
+        ]
+        return cls(tests=tests, **data)
+
+    def benchmark(self, runner: pyperf.Runner, **kwargs):  # pragma: no cover
+        for test in self.tests:
+            runner.bench_func(
+                test.fully_qualified_name,
+                partial(test.validate_ignoring_errors, **kwargs),
+            )
+
+
+@frozen(repr=False)
+class _Test:
+
+    version: Version
+
+    subject: str
+    case_description: str
+    description: str
+
+    data: Any
+    schema: Mapping[str, Any] | bool
+
+    valid: bool
+
+    _remotes: referencing.jsonschema.SchemaRegistry
+
+    comment: str | None = None
+
+    def __repr__(self):  # pragma: no cover
+        return f"<Test {self.fully_qualified_name}>"
+
+    @property
+    def fully_qualified_name(self):  # pragma: no cover
+        return " > ".join(  # noqa: FLY002
+            [
+                self.version.name,
+                self.subject,
+                self.case_description,
+                self.description,
+            ],
+        )
+
+    def to_unittest_method(self, skip=lambda test: None, **kwargs):
+        if self.valid:
+            def fn(this):
+                self.validate(**kwargs)
+        else:
+            def fn(this):
+                with this.assertRaises(jsonschema.ValidationError):
+                    self.validate(**kwargs)
+
+        fn.__name__ = "_".join(
+            [
+                "test",
+                _DELIMITERS.sub("_", self.subject),
+                _DELIMITERS.sub("_", self.case_description),
+                _DELIMITERS.sub("_", self.description),
+            ],
+        )
+        reason = skip(self)
+        if reason is None or os.environ.get("JSON_SCHEMA_DEBUG", "0") != "0":
+            return fn
+        elif os.environ.get("JSON_SCHEMA_EXPECTED_FAILURES", "0") != "0":  # pragma: no cover  # noqa: E501
+            return unittest.expectedFailure(fn)
+        else:
+            return unittest.skip(reason)(fn)
+
+    def validate(self, Validator, **kwargs):
+        Validator.check_schema(self.schema)
+        validator = Validator(
+            schema=self.schema,
+            registry=self._remotes,
+            **kwargs,
+        )
+        if os.environ.get("JSON_SCHEMA_DEBUG", "0") != "0":  # pragma: no cover
+            breakpoint()  # noqa: T100
+        validator.validate(instance=self.data)
+
+    def validate_ignoring_errors(self, Validator):  # pragma: no cover
+        with suppress(jsonschema.ValidationError):
+            self.validate(Validator=Validator)
+
+
+def _someone_save_us_the_module_of_the_caller():
+    """
+    The FQON of the module 2nd stack frames up from here.
+
+    This is intended to allow us to dynamically return test case classes that
+    are indistinguishable from being defined in the module that wants them.
+
+    Otherwise, trial will mis-print the FQON, and copy pasting it won't re-run
+    the class that really is running.
+
+    Save us all, this is all so so so so so terrible.
+    """
+
+    return sys._getframe(2).f_globals["__name__"]
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/fuzz_validate.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/fuzz_validate.py
new file mode 100644
index 00000000..c12e88bc
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/fuzz_validate.py
@@ -0,0 +1,50 @@
+"""
+Fuzzing setup for OSS-Fuzz.
+
+See https://github.com/google/oss-fuzz/tree/master/projects/jsonschema for the
+other half of the setup here.
+"""
+import sys
+
+from hypothesis import given, strategies
+
+import jsonschema
+
+PRIM = strategies.one_of(
+    strategies.booleans(),
+    strategies.integers(),
+    strategies.floats(allow_nan=False, allow_infinity=False),
+    strategies.text(),
+)
+DICT = strategies.recursive(
+    base=strategies.one_of(
+        strategies.booleans(),
+        strategies.dictionaries(strategies.text(), PRIM),
+    ),
+    extend=lambda inner: strategies.dictionaries(strategies.text(), inner),
+)
+
+
+@given(obj1=DICT, obj2=DICT)
+def test_schemas(obj1, obj2):
+    try:
+        jsonschema.validate(instance=obj1, schema=obj2)
+    except jsonschema.exceptions.ValidationError:
+        pass
+    except jsonschema.exceptions.SchemaError:
+        pass
+
+
+def main():
+    atheris.instrument_all()
+    atheris.Setup(
+        sys.argv,
+        test_schemas.hypothesis.fuzz_one_input,
+        enable_python_coverage=True,
+    )
+    atheris.Fuzz()
+
+
+if __name__ == "__main__":
+    import atheris
+    main()
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_cli.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_cli.py
new file mode 100644
index 00000000..79d2a158
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_cli.py
@@ -0,0 +1,907 @@
+from contextlib import redirect_stderr, redirect_stdout
+from importlib import metadata
+from io import StringIO
+from json import JSONDecodeError
+from pathlib import Path
+from textwrap import dedent
+from unittest import TestCase
+import json
+import os
+import subprocess
+import sys
+import tempfile
+import warnings
+
+from jsonschema import Draft4Validator, Draft202012Validator
+from jsonschema.exceptions import (
+    SchemaError,
+    ValidationError,
+    _RefResolutionError,
+)
+from jsonschema.validators import _LATEST_VERSION, validate
+
+with warnings.catch_warnings():
+    warnings.simplefilter("ignore")
+    from jsonschema import cli
+
+
+def fake_validator(*errors):
+    errors = list(reversed(errors))
+
+    class FakeValidator:
+        def __init__(self, *args, **kwargs):
+            pass
+
+        def iter_errors(self, instance):
+            if errors:
+                return errors.pop()
+            return []  # pragma: no cover
+
+        @classmethod
+        def check_schema(self, schema):
+            pass
+
+    return FakeValidator
+
+
+def fake_open(all_contents):
+    def open(path):
+        contents = all_contents.get(path)
+        if contents is None:
+            raise FileNotFoundError(path)
+        return StringIO(contents)
+    return open
+
+
+def _message_for(non_json):
+    try:
+        json.loads(non_json)
+    except JSONDecodeError as error:
+        return str(error)
+    else:  # pragma: no cover
+        raise RuntimeError("Tried and failed to capture a JSON dump error.")
+
+
+class TestCLI(TestCase):
+    def run_cli(
+        self, argv, files=None, stdin=StringIO(), exit_code=0, **override,
+    ):
+        arguments = cli.parse_args(argv)
+        arguments.update(override)
+
+        self.assertFalse(hasattr(cli, "open"))
+        cli.open = fake_open(files or {})
+        try:
+            stdout, stderr = StringIO(), StringIO()
+            actual_exit_code = cli.run(
+                arguments,
+                stdin=stdin,
+                stdout=stdout,
+                stderr=stderr,
+            )
+        finally:
+            del cli.open
+
+        self.assertEqual(
+            actual_exit_code, exit_code, msg=dedent(
+                f"""
+                    Expected an exit code of {exit_code} != {actual_exit_code}.
+
+                    stdout: {stdout.getvalue()}
+
+                    stderr: {stderr.getvalue()}
+                """,
+            ),
+        )
+        return stdout.getvalue(), stderr.getvalue()
+
+    def assertOutputs(self, stdout="", stderr="", **kwargs):
+        self.assertEqual(
+            self.run_cli(**kwargs),
+            (dedent(stdout), dedent(stderr)),
+        )
+
+    def test_invalid_instance(self):
+        error = ValidationError("I am an error!", instance=12)
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_instance=json.dumps(error.instance),
+            ),
+            validator=fake_validator([error]),
+
+            argv=["-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+            stderr="12: I am an error!\n",
+        )
+
+    def test_invalid_instance_pretty_output(self):
+        error = ValidationError("I am an error!", instance=12)
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_instance=json.dumps(error.instance),
+            ),
+            validator=fake_validator([error]),
+
+            argv=["-i", "some_instance", "--output", "pretty", "some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                ===[ValidationError]===(some_instance)===
+
+                I am an error!
+                -----------------------------
+            """,
+        )
+
+    def test_invalid_instance_explicit_plain_output(self):
+        error = ValidationError("I am an error!", instance=12)
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_instance=json.dumps(error.instance),
+            ),
+            validator=fake_validator([error]),
+
+            argv=["--output", "plain", "-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+            stderr="12: I am an error!\n",
+        )
+
+    def test_invalid_instance_multiple_errors(self):
+        instance = 12
+        first = ValidationError("First error", instance=instance)
+        second = ValidationError("Second error", instance=instance)
+
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_instance=json.dumps(instance),
+            ),
+            validator=fake_validator([first, second]),
+
+            argv=["-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                12: First error
+                12: Second error
+            """,
+        )
+
+    def test_invalid_instance_multiple_errors_pretty_output(self):
+        instance = 12
+        first = ValidationError("First error", instance=instance)
+        second = ValidationError("Second error", instance=instance)
+
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_instance=json.dumps(instance),
+            ),
+            validator=fake_validator([first, second]),
+
+            argv=["-i", "some_instance", "--output", "pretty", "some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                ===[ValidationError]===(some_instance)===
+
+                First error
+                -----------------------------
+                ===[ValidationError]===(some_instance)===
+
+                Second error
+                -----------------------------
+            """,
+        )
+
+    def test_multiple_invalid_instances(self):
+        first_instance = 12
+        first_errors = [
+            ValidationError("An error", instance=first_instance),
+            ValidationError("Another error", instance=first_instance),
+        ]
+        second_instance = "foo"
+        second_errors = [ValidationError("BOOM", instance=second_instance)]
+
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_first_instance=json.dumps(first_instance),
+                some_second_instance=json.dumps(second_instance),
+            ),
+            validator=fake_validator(first_errors, second_errors),
+
+            argv=[
+                "-i", "some_first_instance",
+                "-i", "some_second_instance",
+                "some_schema",
+            ],
+
+            exit_code=1,
+            stderr="""\
+                12: An error
+                12: Another error
+                foo: BOOM
+            """,
+        )
+
+    def test_multiple_invalid_instances_pretty_output(self):
+        first_instance = 12
+        first_errors = [
+            ValidationError("An error", instance=first_instance),
+            ValidationError("Another error", instance=first_instance),
+        ]
+        second_instance = "foo"
+        second_errors = [ValidationError("BOOM", instance=second_instance)]
+
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_first_instance=json.dumps(first_instance),
+                some_second_instance=json.dumps(second_instance),
+            ),
+            validator=fake_validator(first_errors, second_errors),
+
+            argv=[
+                "--output", "pretty",
+                "-i", "some_first_instance",
+                "-i", "some_second_instance",
+                "some_schema",
+            ],
+
+            exit_code=1,
+            stderr="""\
+                ===[ValidationError]===(some_first_instance)===
+
+                An error
+                -----------------------------
+                ===[ValidationError]===(some_first_instance)===
+
+                Another error
+                -----------------------------
+                ===[ValidationError]===(some_second_instance)===
+
+                BOOM
+                -----------------------------
+            """,
+        )
+
+    def test_custom_error_format(self):
+        first_instance = 12
+        first_errors = [
+            ValidationError("An error", instance=first_instance),
+            ValidationError("Another error", instance=first_instance),
+        ]
+        second_instance = "foo"
+        second_errors = [ValidationError("BOOM", instance=second_instance)]
+
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"does not": "matter since it is stubbed"}',
+                some_first_instance=json.dumps(first_instance),
+                some_second_instance=json.dumps(second_instance),
+            ),
+            validator=fake_validator(first_errors, second_errors),
+
+            argv=[
+                "--error-format", ":{error.message}._-_.{error.instance}:",
+                "-i", "some_first_instance",
+                "-i", "some_second_instance",
+                "some_schema",
+            ],
+
+            exit_code=1,
+            stderr=":An error._-_.12::Another error._-_.12::BOOM._-_.foo:",
+        )
+
+    def test_invalid_schema(self):
+        self.assertOutputs(
+            files=dict(some_schema='{"type": 12}'),
+            argv=["some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                12: 12 is not valid under any of the given schemas
+            """,
+        )
+
+    def test_invalid_schema_pretty_output(self):
+        schema = {"type": 12}
+
+        with self.assertRaises(SchemaError) as e:
+            validate(schema=schema, instance="")
+        error = str(e.exception)
+
+        self.assertOutputs(
+            files=dict(some_schema=json.dumps(schema)),
+            argv=["--output", "pretty", "some_schema"],
+
+            exit_code=1,
+            stderr=(
+                "===[SchemaError]===(some_schema)===\n\n"
+                + str(error)
+                + "\n-----------------------------\n"
+            ),
+        )
+
+    def test_invalid_schema_multiple_errors(self):
+        self.assertOutputs(
+            files=dict(some_schema='{"type": 12, "items": 57}'),
+            argv=["some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                57: 57 is not of type 'object', 'boolean'
+            """,
+        )
+
+    def test_invalid_schema_multiple_errors_pretty_output(self):
+        schema = {"type": 12, "items": 57}
+
+        with self.assertRaises(SchemaError) as e:
+            validate(schema=schema, instance="")
+        error = str(e.exception)
+
+        self.assertOutputs(
+            files=dict(some_schema=json.dumps(schema)),
+            argv=["--output", "pretty", "some_schema"],
+
+            exit_code=1,
+            stderr=(
+                "===[SchemaError]===(some_schema)===\n\n"
+                + str(error)
+                + "\n-----------------------------\n"
+            ),
+        )
+
+    def test_invalid_schema_with_invalid_instance(self):
+        """
+        "Validating" an instance that's invalid under an invalid schema
+        just shows the schema error.
+        """
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"type": 12, "minimum": 30}',
+                some_instance="13",
+            ),
+            argv=["-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                12: 12 is not valid under any of the given schemas
+            """,
+        )
+
+    def test_invalid_schema_with_invalid_instance_pretty_output(self):
+        instance, schema = 13, {"type": 12, "minimum": 30}
+
+        with self.assertRaises(SchemaError) as e:
+            validate(schema=schema, instance=instance)
+        error = str(e.exception)
+
+        self.assertOutputs(
+            files=dict(
+                some_schema=json.dumps(schema),
+                some_instance=json.dumps(instance),
+            ),
+            argv=["--output", "pretty", "-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+            stderr=(
+                "===[SchemaError]===(some_schema)===\n\n"
+                + str(error)
+                + "\n-----------------------------\n"
+            ),
+        )
+
+    def test_invalid_instance_continues_with_the_rest(self):
+        self.assertOutputs(
+            files=dict(
+                some_schema='{"minimum": 30}',
+                first_instance="not valid JSON!",
+                second_instance="12",
+            ),
+            argv=[
+                "-i", "first_instance",
+                "-i", "second_instance",
+                "some_schema",
+            ],
+
+            exit_code=1,
+            stderr="""\
+                Failed to parse 'first_instance': {}
+                12: 12 is less than the minimum of 30
+            """.format(_message_for("not valid JSON!")),
+        )
+
+    def test_custom_error_format_applies_to_schema_errors(self):
+        instance, schema = 13, {"type": 12, "minimum": 30}
+
+        with self.assertRaises(SchemaError):
+            validate(schema=schema, instance=instance)
+
+        self.assertOutputs(
+            files=dict(some_schema=json.dumps(schema)),
+
+            argv=[
+                "--error-format", ":{error.message}._-_.{error.instance}:",
+                "some_schema",
+            ],
+
+            exit_code=1,
+            stderr=":12 is not valid under any of the given schemas._-_.12:",
+        )
+
+    def test_instance_is_invalid_JSON(self):
+        instance = "not valid JSON!"
+
+        self.assertOutputs(
+            files=dict(some_schema="{}", some_instance=instance),
+            argv=["-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+            stderr=f"""\
+                Failed to parse 'some_instance': {_message_for(instance)}
+            """,
+        )
+
+    def test_instance_is_invalid_JSON_pretty_output(self):
+        stdout, stderr = self.run_cli(
+            files=dict(
+                some_schema="{}",
+                some_instance="not valid JSON!",
+            ),
+
+            argv=["--output", "pretty", "-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+        )
+        self.assertFalse(stdout)
+        self.assertIn(
+            "(some_instance)===\n\nTraceback (most recent call last):\n",
+            stderr,
+        )
+        self.assertNotIn("some_schema", stderr)
+
+    def test_instance_is_invalid_JSON_on_stdin(self):
+        instance = "not valid JSON!"
+
+        self.assertOutputs(
+            files=dict(some_schema="{}"),
+            stdin=StringIO(instance),
+
+            argv=["some_schema"],
+
+            exit_code=1,
+            stderr=f"""\
+                Failed to parse <stdin>: {_message_for(instance)}
+            """,
+        )
+
+    def test_instance_is_invalid_JSON_on_stdin_pretty_output(self):
+        stdout, stderr = self.run_cli(
+            files=dict(some_schema="{}"),
+            stdin=StringIO("not valid JSON!"),
+
+            argv=["--output", "pretty", "some_schema"],
+
+            exit_code=1,
+        )
+        self.assertFalse(stdout)
+        self.assertIn(
+            "(<stdin>)===\n\nTraceback (most recent call last):\n",
+            stderr,
+        )
+        self.assertNotIn("some_schema", stderr)
+
+    def test_schema_is_invalid_JSON(self):
+        schema = "not valid JSON!"
+
+        self.assertOutputs(
+            files=dict(some_schema=schema),
+
+            argv=["some_schema"],
+
+            exit_code=1,
+            stderr=f"""\
+                Failed to parse 'some_schema': {_message_for(schema)}
+            """,
+        )
+
+    def test_schema_is_invalid_JSON_pretty_output(self):
+        stdout, stderr = self.run_cli(
+            files=dict(some_schema="not valid JSON!"),
+
+            argv=["--output", "pretty", "some_schema"],
+
+            exit_code=1,
+        )
+        self.assertFalse(stdout)
+        self.assertIn(
+            "(some_schema)===\n\nTraceback (most recent call last):\n",
+            stderr,
+        )
+
+    def test_schema_and_instance_are_both_invalid_JSON(self):
+        """
+        Only the schema error is reported, as we abort immediately.
+        """
+        schema, instance = "not valid JSON!", "also not valid JSON!"
+        self.assertOutputs(
+            files=dict(some_schema=schema, some_instance=instance),
+
+            argv=["some_schema"],
+
+            exit_code=1,
+            stderr=f"""\
+                Failed to parse 'some_schema': {_message_for(schema)}
+            """,
+        )
+
+    def test_schema_and_instance_are_both_invalid_JSON_pretty_output(self):
+        """
+        Only the schema error is reported, as we abort immediately.
+        """
+        stdout, stderr = self.run_cli(
+            files=dict(
+                some_schema="not valid JSON!",
+                some_instance="also not valid JSON!",
+            ),
+
+            argv=["--output", "pretty", "-i", "some_instance", "some_schema"],
+
+            exit_code=1,
+        )
+        self.assertFalse(stdout)
+        self.assertIn(
+            "(some_schema)===\n\nTraceback (most recent call last):\n",
+            stderr,
+        )
+        self.assertNotIn("some_instance", stderr)
+
+    def test_instance_does_not_exist(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}"),
+            argv=["-i", "nonexisting_instance", "some_schema"],
+
+            exit_code=1,
+            stderr="""\
+                'nonexisting_instance' does not exist.
+            """,
+        )
+
+    def test_instance_does_not_exist_pretty_output(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}"),
+            argv=[
+                "--output", "pretty",
+                "-i", "nonexisting_instance",
+                "some_schema",
+            ],
+
+            exit_code=1,
+            stderr="""\
+                ===[FileNotFoundError]===(nonexisting_instance)===
+
+                'nonexisting_instance' does not exist.
+                -----------------------------
+            """,
+        )
+
+    def test_schema_does_not_exist(self):
+        self.assertOutputs(
+            argv=["nonexisting_schema"],
+
+            exit_code=1,
+            stderr="'nonexisting_schema' does not exist.\n",
+        )
+
+    def test_schema_does_not_exist_pretty_output(self):
+        self.assertOutputs(
+            argv=["--output", "pretty", "nonexisting_schema"],
+
+            exit_code=1,
+            stderr="""\
+                ===[FileNotFoundError]===(nonexisting_schema)===
+
+                'nonexisting_schema' does not exist.
+                -----------------------------
+            """,
+        )
+
+    def test_neither_instance_nor_schema_exist(self):
+        self.assertOutputs(
+            argv=["-i", "nonexisting_instance", "nonexisting_schema"],
+
+            exit_code=1,
+            stderr="'nonexisting_schema' does not exist.\n",
+        )
+
+    def test_neither_instance_nor_schema_exist_pretty_output(self):
+        self.assertOutputs(
+            argv=[
+                "--output", "pretty",
+                "-i", "nonexisting_instance",
+                "nonexisting_schema",
+            ],
+
+            exit_code=1,
+            stderr="""\
+                ===[FileNotFoundError]===(nonexisting_schema)===
+
+                'nonexisting_schema' does not exist.
+                -----------------------------
+            """,
+        )
+
+    def test_successful_validation(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}", some_instance="{}"),
+            argv=["-i", "some_instance", "some_schema"],
+            stdout="",
+            stderr="",
+        )
+
+    def test_successful_validation_pretty_output(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}", some_instance="{}"),
+            argv=["--output", "pretty", "-i", "some_instance", "some_schema"],
+            stdout="===[SUCCESS]===(some_instance)===\n",
+            stderr="",
+        )
+
+    def test_successful_validation_of_stdin(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}"),
+            stdin=StringIO("{}"),
+            argv=["some_schema"],
+            stdout="",
+            stderr="",
+        )
+
+    def test_successful_validation_of_stdin_pretty_output(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}"),
+            stdin=StringIO("{}"),
+            argv=["--output", "pretty", "some_schema"],
+            stdout="===[SUCCESS]===(<stdin>)===\n",
+            stderr="",
+        )
+
+    def test_successful_validation_of_just_the_schema(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}", some_instance="{}"),
+            argv=["-i", "some_instance", "some_schema"],
+            stdout="",
+            stderr="",
+        )
+
+    def test_successful_validation_of_just_the_schema_pretty_output(self):
+        self.assertOutputs(
+            files=dict(some_schema="{}", some_instance="{}"),
+            argv=["--output", "pretty", "-i", "some_instance", "some_schema"],
+            stdout="===[SUCCESS]===(some_instance)===\n",
+            stderr="",
+        )
+
+    def test_successful_validation_via_explicit_base_uri(self):
+        ref_schema_file = tempfile.NamedTemporaryFile(delete=False)
+        ref_schema_file.close()
+        self.addCleanup(os.remove, ref_schema_file.name)
+
+        ref_path = Path(ref_schema_file.name)
+        ref_path.write_text('{"definitions": {"num": {"type": "integer"}}}')
+
+        schema = f'{{"$ref": "{ref_path.name}#/definitions/num"}}'
+
+        self.assertOutputs(
+            files=dict(some_schema=schema, some_instance="1"),
+            argv=[
+                "-i", "some_instance",
+                "--base-uri", ref_path.parent.as_uri() + "/",
+                "some_schema",
+            ],
+            stdout="",
+            stderr="",
+        )
+
+    def test_unsuccessful_validation_via_explicit_base_uri(self):
+        ref_schema_file = tempfile.NamedTemporaryFile(delete=False)
+        ref_schema_file.close()
+        self.addCleanup(os.remove, ref_schema_file.name)
+
+        ref_path = Path(ref_schema_file.name)
+        ref_path.write_text('{"definitions": {"num": {"type": "integer"}}}')
+
+        schema = f'{{"$ref": "{ref_path.name}#/definitions/num"}}'
+
+        self.assertOutputs(
+            files=dict(some_schema=schema, some_instance='"1"'),
+            argv=[
+                "-i", "some_instance",
+                "--base-uri", ref_path.parent.as_uri() + "/",
+                "some_schema",
+            ],
+            exit_code=1,
+            stdout="",
+            stderr="1: '1' is not of type 'integer'\n",
+        )
+
+    def test_nonexistent_file_with_explicit_base_uri(self):
+        schema = '{"$ref": "someNonexistentFile.json#definitions/num"}'
+        instance = "1"
+
+        with self.assertRaises(_RefResolutionError) as e:
+            self.assertOutputs(
+                files=dict(
+                    some_schema=schema,
+                    some_instance=instance,
+                ),
+                argv=[
+                    "-i", "some_instance",
+                    "--base-uri", Path.cwd().as_uri(),
+                    "some_schema",
+                ],
+            )
+        error = str(e.exception)
+        self.assertIn(f"{os.sep}someNonexistentFile.json'", error)
+
+    def test_invalid_explicit_base_uri(self):
+        schema = '{"$ref": "foo.json#definitions/num"}'
+        instance = "1"
+
+        with self.assertRaises(_RefResolutionError) as e:
+            self.assertOutputs(
+                files=dict(
+                    some_schema=schema,
+                    some_instance=instance,
+                ),
+                argv=[
+                    "-i", "some_instance",
+                    "--base-uri", "not@UR1",
+                    "some_schema",
+                ],
+            )
+        error = str(e.exception)
+        self.assertEqual(
+            error, "unknown url type: 'foo.json'",
+        )
+
+    def test_it_validates_using_the_latest_validator_when_unspecified(self):
+        # There isn't a better way now I can think of to ensure that the
+        # latest version was used, given that the call to validator_for
+        # is hidden inside the CLI, so guard that that's the case, and
+        # this test will have to be updated when versions change until
+        # we can think of a better way to ensure this behavior.
+        self.assertIs(Draft202012Validator, _LATEST_VERSION)
+
+        self.assertOutputs(
+            files=dict(some_schema='{"const": "check"}', some_instance='"a"'),
+            argv=["-i", "some_instance", "some_schema"],
+            exit_code=1,
+            stdout="",
+            stderr="a: 'check' was expected\n",
+        )
+
+    def test_it_validates_using_draft7_when_specified(self):
+        """
+        Specifically, `const` validation applies for Draft 7.
+        """
+        schema = """
+            {
+                "$schema": "http://json-schema.org/draft-07/schema#",
+                "const": "check"
+            }
+        """
+        instance = '"foo"'
+        self.assertOutputs(
+            files=dict(some_schema=schema, some_instance=instance),
+            argv=["-i", "some_instance", "some_schema"],
+            exit_code=1,
+            stdout="",
+            stderr="foo: 'check' was expected\n",
+        )
+
+    def test_it_validates_using_draft4_when_specified(self):
+        """
+        Specifically, `const` validation *does not* apply for Draft 4.
+        """
+        schema = """
+            {
+                "$schema": "http://json-schema.org/draft-04/schema#",
+                "const": "check"
+            }
+            """
+        instance = '"foo"'
+        self.assertOutputs(
+            files=dict(some_schema=schema, some_instance=instance),
+            argv=["-i", "some_instance", "some_schema"],
+            stdout="",
+            stderr="",
+        )
+
+
+class TestParser(TestCase):
+
+    FakeValidator = fake_validator()
+
+    def test_find_validator_by_fully_qualified_object_name(self):
+        arguments = cli.parse_args(
+            [
+                "--validator",
+                "jsonschema.tests.test_cli.TestParser.FakeValidator",
+                "--instance", "mem://some/instance",
+                "mem://some/schema",
+            ],
+        )
+        self.assertIs(arguments["validator"], self.FakeValidator)
+
+    def test_find_validator_in_jsonschema(self):
+        arguments = cli.parse_args(
+            [
+                "--validator", "Draft4Validator",
+                "--instance", "mem://some/instance",
+                "mem://some/schema",
+            ],
+        )
+        self.assertIs(arguments["validator"], Draft4Validator)
+
+    def cli_output_for(self, *argv):
+        stdout, stderr = StringIO(), StringIO()
+        with redirect_stdout(stdout), redirect_stderr(stderr):  # noqa: SIM117
+            with self.assertRaises(SystemExit):
+                cli.parse_args(argv)
+        return stdout.getvalue(), stderr.getvalue()
+
+    def test_unknown_output(self):
+        stdout, stderr = self.cli_output_for(
+            "--output", "foo",
+            "mem://some/schema",
+        )
+        self.assertIn("invalid choice: 'foo'", stderr)
+        self.assertFalse(stdout)
+
+    def test_useless_error_format(self):
+        stdout, stderr = self.cli_output_for(
+            "--output", "pretty",
+            "--error-format", "foo",
+            "mem://some/schema",
+        )
+        self.assertIn(
+            "--error-format can only be used with --output plain",
+            stderr,
+        )
+        self.assertFalse(stdout)
+
+
+class TestCLIIntegration(TestCase):
+    def test_license(self):
+        output = subprocess.check_output(
+            [sys.executable, "-m", "pip", "show", "jsonschema"],
+            stderr=subprocess.STDOUT,
+        )
+        self.assertIn(b"License: MIT", output)
+
+    def test_version(self):
+        version = subprocess.check_output(
+            [sys.executable, "-W", "ignore", "-m", "jsonschema", "--version"],
+            stderr=subprocess.STDOUT,
+        )
+        version = version.decode("utf-8").strip()
+        self.assertEqual(version, metadata.version("jsonschema"))
+
+    def test_no_arguments_shows_usage_notes(self):
+        output = subprocess.check_output(
+            [sys.executable, "-m", "jsonschema"],
+            stderr=subprocess.STDOUT,
+        )
+        output_for_help = subprocess.check_output(
+            [sys.executable, "-m", "jsonschema", "--help"],
+            stderr=subprocess.STDOUT,
+        )
+        self.assertEqual(output, output_for_help)
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_deprecations.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_deprecations.py
new file mode 100644
index 00000000..aea922d2
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_deprecations.py
@@ -0,0 +1,432 @@
+from contextlib import contextmanager
+from io import BytesIO
+from unittest import TestCase, mock
+import importlib.metadata
+import json
+import subprocess
+import sys
+import urllib.request
+
+import referencing.exceptions
+
+from jsonschema import FormatChecker, exceptions, protocols, validators
+
+
+class TestDeprecations(TestCase):
+    def test_version(self):
+        """
+        As of v4.0.0, __version__ is deprecated in favor of importlib.metadata.
+        """
+
+        message = "Accessing jsonschema.__version__ is deprecated"
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import __version__
+
+        self.assertEqual(__version__, importlib.metadata.version("jsonschema"))
+        self.assertEqual(w.filename, __file__)
+
+    def test_validators_ErrorTree(self):
+        """
+        As of v4.0.0, importing ErrorTree from jsonschema.validators is
+        deprecated in favor of doing so from jsonschema.exceptions.
+        """
+
+        message = "Importing ErrorTree from jsonschema.validators is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema.validators import ErrorTree
+
+        self.assertEqual(ErrorTree, exceptions.ErrorTree)
+        self.assertEqual(w.filename, __file__)
+
+    def test_import_ErrorTree(self):
+        """
+        As of v4.18.0, importing ErrorTree from the package root is
+        deprecated in favor of doing so from jsonschema.exceptions.
+        """
+
+        message = "Importing ErrorTree directly from the jsonschema package "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import ErrorTree
+
+        self.assertEqual(ErrorTree, exceptions.ErrorTree)
+        self.assertEqual(w.filename, __file__)
+
+    def test_ErrorTree_setitem(self):
+        """
+        As of v4.20.0, setting items on an ErrorTree is deprecated.
+        """
+
+        e = exceptions.ValidationError("some error", path=["foo"])
+        tree = exceptions.ErrorTree()
+        subtree = exceptions.ErrorTree(errors=[e])
+
+        message = "ErrorTree.__setitem__ is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            tree["foo"] = subtree
+
+        self.assertEqual(tree["foo"], subtree)
+        self.assertEqual(w.filename, __file__)
+
+    def test_import_FormatError(self):
+        """
+        As of v4.18.0, importing FormatError from the package root is
+        deprecated in favor of doing so from jsonschema.exceptions.
+        """
+
+        message = "Importing FormatError directly from the jsonschema package "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import FormatError
+
+        self.assertEqual(FormatError, exceptions.FormatError)
+        self.assertEqual(w.filename, __file__)
+
+    def test_import_Validator(self):
+        """
+        As of v4.19.0, importing Validator from the package root is
+        deprecated in favor of doing so from jsonschema.protocols.
+        """
+
+        message = "Importing Validator directly from the jsonschema package "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import Validator
+
+        self.assertEqual(Validator, protocols.Validator)
+        self.assertEqual(w.filename, __file__)
+
+    def test_validators_validators(self):
+        """
+        As of v4.0.0, accessing jsonschema.validators.validators is
+        deprecated.
+        """
+
+        message = "Accessing jsonschema.validators.validators is deprecated"
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            value = validators.validators
+
+        self.assertEqual(value, validators._VALIDATORS)
+        self.assertEqual(w.filename, __file__)
+
+    def test_validators_meta_schemas(self):
+        """
+        As of v4.0.0, accessing jsonschema.validators.meta_schemas is
+        deprecated.
+        """
+
+        message = "Accessing jsonschema.validators.meta_schemas is deprecated"
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            value = validators.meta_schemas
+
+        self.assertEqual(value, validators._META_SCHEMAS)
+        self.assertEqual(w.filename, __file__)
+
+    def test_RefResolver_in_scope(self):
+        """
+        As of v4.0.0, RefResolver.in_scope is deprecated.
+        """
+
+        resolver = validators._RefResolver.from_schema({})
+        message = "jsonschema.RefResolver.in_scope is deprecated "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:  # noqa: SIM117
+            with resolver.in_scope("foo"):
+                pass
+
+        self.assertEqual(w.filename, __file__)
+
+    def test_Validator_is_valid_two_arguments(self):
+        """
+        As of v4.0.0, calling is_valid with two arguments (to provide a
+        different schema) is deprecated.
+        """
+
+        validator = validators.Draft7Validator({})
+        message = "Passing a schema to Validator.is_valid is deprecated "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            result = validator.is_valid("foo", {"type": "number"})
+
+        self.assertFalse(result)
+        self.assertEqual(w.filename, __file__)
+
+    def test_Validator_iter_errors_two_arguments(self):
+        """
+        As of v4.0.0, calling iter_errors with two arguments (to provide a
+        different schema) is deprecated.
+        """
+
+        validator = validators.Draft7Validator({})
+        message = "Passing a schema to Validator.iter_errors is deprecated "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            error, = validator.iter_errors("foo", {"type": "number"})
+
+        self.assertEqual(error.validator, "type")
+        self.assertEqual(w.filename, __file__)
+
+    def test_Validator_resolver(self):
+        """
+        As of v4.18.0, accessing Validator.resolver is deprecated.
+        """
+
+        validator = validators.Draft7Validator({})
+        message = "Accessing Draft7Validator.resolver is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            self.assertIsInstance(validator.resolver, validators._RefResolver)
+
+        self.assertEqual(w.filename, __file__)
+
+    def test_RefResolver(self):
+        """
+        As of v4.18.0, RefResolver is fully deprecated.
+        """
+
+        message = "jsonschema.RefResolver is deprecated"
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import RefResolver
+        self.assertEqual(w.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema.validators import RefResolver  # noqa: F401, F811
+        self.assertEqual(w.filename, __file__)
+
+    def test_RefResolutionError(self):
+        """
+        As of v4.18.0, RefResolutionError is deprecated in favor of directly
+        catching errors from the referencing library.
+        """
+
+        message = "jsonschema.exceptions.RefResolutionError is deprecated"
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import RefResolutionError
+
+        self.assertEqual(RefResolutionError, exceptions._RefResolutionError)
+        self.assertEqual(w.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema.exceptions import RefResolutionError
+
+        self.assertEqual(RefResolutionError, exceptions._RefResolutionError)
+        self.assertEqual(w.filename, __file__)
+
+    def test_catching_Unresolvable_directly(self):
+        """
+        This behavior is the intended behavior (i.e. it's not deprecated), but
+        given we do "tricksy" things in the iterim to wrap exceptions in a
+        multiple inheritance subclass, we need to be extra sure it works and
+        stays working.
+        """
+        validator = validators.Draft202012Validator({"$ref": "urn:nothing"})
+
+        with self.assertRaises(referencing.exceptions.Unresolvable) as e:
+            validator.validate(12)
+
+        expected = referencing.exceptions.Unresolvable(ref="urn:nothing")
+        self.assertEqual(
+            (e.exception, str(e.exception)),
+            (expected, "Unresolvable: urn:nothing"),
+        )
+
+    def test_catching_Unresolvable_via_RefResolutionError(self):
+        """
+        Until RefResolutionError is removed, it is still possible to catch
+        exceptions from reference resolution using it, even though they may
+        have been raised by referencing.
+        """
+        with self.assertWarns(DeprecationWarning):
+            from jsonschema import RefResolutionError
+
+        validator = validators.Draft202012Validator({"$ref": "urn:nothing"})
+
+        with self.assertRaises(referencing.exceptions.Unresolvable) as u:
+            validator.validate(12)
+
+        with self.assertRaises(RefResolutionError) as e:
+            validator.validate(12)
+
+        self.assertEqual(
+            (e.exception, str(e.exception)),
+            (u.exception, "Unresolvable: urn:nothing"),
+        )
+
+    def test_WrappedReferencingError_hashability(self):
+        """
+        Ensure the wrapped referencing errors are hashable when possible.
+        """
+        with self.assertWarns(DeprecationWarning):
+            from jsonschema import RefResolutionError
+
+        validator = validators.Draft202012Validator({"$ref": "urn:nothing"})
+
+        with self.assertRaises(referencing.exceptions.Unresolvable) as u:
+            validator.validate(12)
+
+        with self.assertRaises(RefResolutionError) as e:
+            validator.validate(12)
+
+        self.assertIn(e.exception, {u.exception})
+        self.assertIn(u.exception, {e.exception})
+
+    def test_Validator_subclassing(self):
+        """
+        As of v4.12.0, subclassing a validator class produces an explicit
+        deprecation warning.
+
+        This was never intended to be public API (and some comments over the
+        years in issues said so, but obviously that's not a great way to make
+        sure it's followed).
+
+        A future version will explicitly raise an error.
+        """
+
+        message = "Subclassing validator classes is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            class Subclass(validators.Draft202012Validator):
+                pass
+
+        self.assertEqual(w.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            class AnotherSubclass(validators.create(meta_schema={})):
+                pass
+
+    def test_FormatChecker_cls_checks(self):
+        """
+        As of v4.14.0, FormatChecker.cls_checks is deprecated without
+        replacement.
+        """
+
+        self.addCleanup(FormatChecker.checkers.pop, "boom", None)
+
+        message = "FormatChecker.cls_checks "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            FormatChecker.cls_checks("boom")
+
+        self.assertEqual(w.filename, __file__)
+
+    def test_draftN_format_checker(self):
+        """
+        As of v4.16.0, accessing jsonschema.draftn_format_checker is deprecated
+        in favor of Validator.FORMAT_CHECKER.
+        """
+
+        message = "Accessing jsonschema.draft202012_format_checker is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import draft202012_format_checker
+
+        self.assertIs(
+            draft202012_format_checker,
+            validators.Draft202012Validator.FORMAT_CHECKER,
+        )
+        self.assertEqual(w.filename, __file__)
+
+        message = "Accessing jsonschema.draft201909_format_checker is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import draft201909_format_checker
+
+        self.assertIs(
+            draft201909_format_checker,
+            validators.Draft201909Validator.FORMAT_CHECKER,
+        )
+        self.assertEqual(w.filename, __file__)
+
+        message = "Accessing jsonschema.draft7_format_checker is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import draft7_format_checker
+
+        self.assertIs(
+            draft7_format_checker,
+            validators.Draft7Validator.FORMAT_CHECKER,
+        )
+        self.assertEqual(w.filename, __file__)
+
+        message = "Accessing jsonschema.draft6_format_checker is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import draft6_format_checker
+
+        self.assertIs(
+            draft6_format_checker,
+            validators.Draft6Validator.FORMAT_CHECKER,
+        )
+        self.assertEqual(w.filename, __file__)
+
+        message = "Accessing jsonschema.draft4_format_checker is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import draft4_format_checker
+
+        self.assertIs(
+            draft4_format_checker,
+            validators.Draft4Validator.FORMAT_CHECKER,
+        )
+        self.assertEqual(w.filename, __file__)
+
+        message = "Accessing jsonschema.draft3_format_checker is "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            from jsonschema import draft3_format_checker
+
+        self.assertIs(
+            draft3_format_checker,
+            validators.Draft3Validator.FORMAT_CHECKER,
+        )
+        self.assertEqual(w.filename, __file__)
+
+        with self.assertRaises(ImportError):
+            from jsonschema import draft1234_format_checker  # noqa: F401
+
+    def test_import_cli(self):
+        """
+        As of v4.17.0, importing jsonschema.cli is deprecated.
+        """
+
+        message = "The jsonschema CLI is deprecated and will be removed "
+        with self.assertWarnsRegex(DeprecationWarning, message) as w:
+            import jsonschema.cli
+            importlib.reload(jsonschema.cli)
+
+        self.assertEqual(w.filename, importlib.__file__)
+
+    def test_cli(self):
+        """
+        As of v4.17.0, the jsonschema CLI is deprecated.
+        """
+
+        process = subprocess.run(
+            [sys.executable, "-m", "jsonschema"],
+            capture_output=True,
+            check=True,
+        )
+        self.assertIn(b"The jsonschema CLI is deprecated ", process.stderr)
+
+    def test_automatic_remote_retrieval(self):
+        """
+        Automatic retrieval of remote references is deprecated as of v4.18.0.
+        """
+        ref = "http://bar#/$defs/baz"
+        schema = {"$defs": {"baz": {"type": "integer"}}}
+
+        if "requests" in sys.modules:  # pragma: no cover
+            self.addCleanup(
+                sys.modules.__setitem__, "requests", sys.modules["requests"],
+            )
+        sys.modules["requests"] = None
+
+        @contextmanager
+        def fake_urlopen(request):
+            self.assertIsInstance(request, urllib.request.Request)
+            self.assertEqual(request.full_url, "http://bar")
+
+            # Ha ha urllib.request.Request "normalizes" header names and
+            # Request.get_header does not also normalize them...
+            (header, value), = request.header_items()
+            self.assertEqual(header.lower(), "user-agent")
+            self.assertEqual(
+                value, "python-jsonschema (deprecated $ref resolution)",
+            )
+            yield BytesIO(json.dumps(schema).encode("utf8"))
+
+        validator = validators.Draft202012Validator({"$ref": ref})
+
+        message = "Automatically retrieving remote references "
+        patch = mock.patch.object(urllib.request, "urlopen", new=fake_urlopen)
+
+        with patch, self.assertWarnsRegex(DeprecationWarning, message):
+            self.assertEqual(
+                (validator.is_valid({}), validator.is_valid(37)),
+                (False, True),
+            )
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_exceptions.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_exceptions.py
new file mode 100644
index 00000000..69114e18
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_exceptions.py
@@ -0,0 +1,702 @@
+from unittest import TestCase
+import textwrap
+
+from jsonschema import exceptions
+from jsonschema.validators import _LATEST_VERSION
+
+
+class TestBestMatch(TestCase):
+    def best_match_of(self, instance, schema):
+        errors = list(_LATEST_VERSION(schema).iter_errors(instance))
+        msg =  f"No errors found for {instance} under {schema!r}!"
+        self.assertTrue(errors, msg=msg)
+
+        best = exceptions.best_match(iter(errors))
+        reversed_best = exceptions.best_match(reversed(errors))
+
+        self.assertEqual(
+            best._contents(),
+            reversed_best._contents(),
+            f"No consistent best match!\nGot: {best}\n\nThen: {reversed_best}",
+        )
+        return best
+
+    def test_shallower_errors_are_better_matches(self):
+        schema = {
+            "properties": {
+                "foo": {
+                    "minProperties": 2,
+                    "properties": {"bar": {"type": "object"}},
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": {"bar": []}}, schema=schema)
+        self.assertEqual(best.validator, "minProperties")
+
+    def test_oneOf_and_anyOf_are_weak_matches(self):
+        """
+        A property you *must* match is probably better than one you have to
+        match a part of.
+        """
+
+        schema = {
+            "minProperties": 2,
+            "anyOf": [{"type": "string"}, {"type": "number"}],
+            "oneOf": [{"type": "string"}, {"type": "number"}],
+        }
+        best = self.best_match_of(instance={}, schema=schema)
+        self.assertEqual(best.validator, "minProperties")
+
+    def test_if_the_most_relevant_error_is_anyOf_it_is_traversed(self):
+        """
+        If the most relevant error is an anyOf, then we traverse its context
+        and select the otherwise *least* relevant error, since in this case
+        that means the most specific, deep, error inside the instance.
+
+        I.e. since only one of the schemas must match, we look for the most
+        relevant one.
+        """
+
+        schema = {
+            "properties": {
+                "foo": {
+                    "anyOf": [
+                        {"type": "string"},
+                        {"properties": {"bar": {"type": "array"}}},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": {"bar": 12}}, schema=schema)
+        self.assertEqual(best.validator_value, "array")
+
+    def test_no_anyOf_traversal_for_equally_relevant_errors(self):
+        """
+        We don't traverse into an anyOf (as above) if all of its context errors
+        seem to be equally "wrong" against the instance.
+        """
+
+        schema = {
+            "anyOf": [
+                {"type": "string"},
+                {"type": "integer"},
+                {"type": "object"},
+            ],
+        }
+        best = self.best_match_of(instance=[], schema=schema)
+        self.assertEqual(best.validator, "anyOf")
+
+    def test_anyOf_traversal_for_single_equally_relevant_error(self):
+        """
+        We *do* traverse anyOf with a single nested error, even though it is
+        vacuously equally relevant to itself.
+        """
+
+        schema = {
+            "anyOf": [
+                {"type": "string"},
+            ],
+        }
+        best = self.best_match_of(instance=[], schema=schema)
+        self.assertEqual(best.validator, "type")
+
+    def test_anyOf_traversal_for_single_sibling_errors(self):
+        """
+        We *do* traverse anyOf with a single subschema that fails multiple
+        times (e.g. on multiple items).
+        """
+
+        schema = {
+            "anyOf": [
+                {"items": {"const": 37}},
+            ],
+        }
+        best = self.best_match_of(instance=[12, 12], schema=schema)
+        self.assertEqual(best.validator, "const")
+
+    def test_anyOf_traversal_for_non_type_matching_sibling_errors(self):
+        """
+        We *do* traverse anyOf with multiple subschemas when one does not type
+        match.
+        """
+
+        schema = {
+            "anyOf": [
+                {"type": "object"},
+                {"items": {"const": 37}},
+            ],
+        }
+        best = self.best_match_of(instance=[12, 12], schema=schema)
+        self.assertEqual(best.validator, "const")
+
+    def test_if_the_most_relevant_error_is_oneOf_it_is_traversed(self):
+        """
+        If the most relevant error is an oneOf, then we traverse its context
+        and select the otherwise *least* relevant error, since in this case
+        that means the most specific, deep, error inside the instance.
+
+        I.e. since only one of the schemas must match, we look for the most
+        relevant one.
+        """
+
+        schema = {
+            "properties": {
+                "foo": {
+                    "oneOf": [
+                        {"type": "string"},
+                        {"properties": {"bar": {"type": "array"}}},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": {"bar": 12}}, schema=schema)
+        self.assertEqual(best.validator_value, "array")
+
+    def test_no_oneOf_traversal_for_equally_relevant_errors(self):
+        """
+        We don't traverse into an oneOf (as above) if all of its context errors
+        seem to be equally "wrong" against the instance.
+        """
+
+        schema = {
+            "oneOf": [
+                {"type": "string"},
+                {"type": "integer"},
+                {"type": "object"},
+            ],
+        }
+        best = self.best_match_of(instance=[], schema=schema)
+        self.assertEqual(best.validator, "oneOf")
+
+    def test_oneOf_traversal_for_single_equally_relevant_error(self):
+        """
+        We *do* traverse oneOf with a single nested error, even though it is
+        vacuously equally relevant to itself.
+        """
+
+        schema = {
+            "oneOf": [
+                {"type": "string"},
+            ],
+        }
+        best = self.best_match_of(instance=[], schema=schema)
+        self.assertEqual(best.validator, "type")
+
+    def test_oneOf_traversal_for_single_sibling_errors(self):
+        """
+        We *do* traverse oneOf with a single subschema that fails multiple
+        times (e.g. on multiple items).
+        """
+
+        schema = {
+            "oneOf": [
+                {"items": {"const": 37}},
+            ],
+        }
+        best = self.best_match_of(instance=[12, 12], schema=schema)
+        self.assertEqual(best.validator, "const")
+
+    def test_oneOf_traversal_for_non_type_matching_sibling_errors(self):
+        """
+        We *do* traverse oneOf with multiple subschemas when one does not type
+        match.
+        """
+
+        schema = {
+            "oneOf": [
+                {"type": "object"},
+                {"items": {"const": 37}},
+            ],
+        }
+        best = self.best_match_of(instance=[12, 12], schema=schema)
+        self.assertEqual(best.validator, "const")
+
+    def test_if_the_most_relevant_error_is_allOf_it_is_traversed(self):
+        """
+        Now, if the error is allOf, we traverse but select the *most* relevant
+        error from the context, because all schemas here must match anyways.
+        """
+
+        schema = {
+            "properties": {
+                "foo": {
+                    "allOf": [
+                        {"type": "string"},
+                        {"properties": {"bar": {"type": "array"}}},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": {"bar": 12}}, schema=schema)
+        self.assertEqual(best.validator_value, "string")
+
+    def test_nested_context_for_oneOf(self):
+        """
+        We traverse into nested contexts (a oneOf containing an error in a
+        nested oneOf here).
+        """
+
+        schema = {
+            "properties": {
+                "foo": {
+                    "oneOf": [
+                        {"type": "string"},
+                        {
+                            "oneOf": [
+                                {"type": "string"},
+                                {
+                                    "properties": {
+                                        "bar": {"type": "array"},
+                                    },
+                                },
+                            ],
+                        },
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": {"bar": 12}}, schema=schema)
+        self.assertEqual(best.validator_value, "array")
+
+    def test_it_prioritizes_matching_types(self):
+        schema = {
+            "properties": {
+                "foo": {
+                    "anyOf": [
+                        {"type": "array", "minItems": 2},
+                        {"type": "string", "minLength": 10},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": "bar"}, schema=schema)
+        self.assertEqual(best.validator, "minLength")
+
+        reordered = {
+            "properties": {
+                "foo": {
+                    "anyOf": [
+                        {"type": "string", "minLength": 10},
+                        {"type": "array", "minItems": 2},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": "bar"}, schema=reordered)
+        self.assertEqual(best.validator, "minLength")
+
+    def test_it_prioritizes_matching_union_types(self):
+        schema = {
+            "properties": {
+                "foo": {
+                    "anyOf": [
+                        {"type": ["array", "object"], "minItems": 2},
+                        {"type": ["integer", "string"], "minLength": 10},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": "bar"}, schema=schema)
+        self.assertEqual(best.validator, "minLength")
+
+        reordered = {
+            "properties": {
+                "foo": {
+                    "anyOf": [
+                        {"type": "string", "minLength": 10},
+                        {"type": "array", "minItems": 2},
+                    ],
+                },
+            },
+        }
+        best = self.best_match_of(instance={"foo": "bar"}, schema=reordered)
+        self.assertEqual(best.validator, "minLength")
+
+    def test_boolean_schemas(self):
+        schema = {"properties": {"foo": False}}
+        best = self.best_match_of(instance={"foo": "bar"}, schema=schema)
+        self.assertIsNone(best.validator)
+
+    def test_one_error(self):
+        validator = _LATEST_VERSION({"minProperties": 2})
+        error, = validator.iter_errors({})
+        self.assertEqual(
+            exceptions.best_match(validator.iter_errors({})).validator,
+            "minProperties",
+        )
+
+    def test_no_errors(self):
+        validator = _LATEST_VERSION({})
+        self.assertIsNone(exceptions.best_match(validator.iter_errors({})))
+
+
+class TestByRelevance(TestCase):
+    def test_short_paths_are_better_matches(self):
+        shallow = exceptions.ValidationError("Oh no!", path=["baz"])
+        deep = exceptions.ValidationError("Oh yes!", path=["foo", "bar"])
+        match = max([shallow, deep], key=exceptions.relevance)
+        self.assertIs(match, shallow)
+
+        match = max([deep, shallow], key=exceptions.relevance)
+        self.assertIs(match, shallow)
+
+    def test_global_errors_are_even_better_matches(self):
+        shallow = exceptions.ValidationError("Oh no!", path=[])
+        deep = exceptions.ValidationError("Oh yes!", path=["foo"])
+
+        errors = sorted([shallow, deep], key=exceptions.relevance)
+        self.assertEqual(
+            [list(error.path) for error in errors],
+            [["foo"], []],
+        )
+
+        errors = sorted([deep, shallow], key=exceptions.relevance)
+        self.assertEqual(
+            [list(error.path) for error in errors],
+            [["foo"], []],
+        )
+
+    def test_weak_keywords_are_lower_priority(self):
+        weak = exceptions.ValidationError("Oh no!", path=[], validator="a")
+        normal = exceptions.ValidationError("Oh yes!", path=[], validator="b")
+
+        best_match = exceptions.by_relevance(weak="a")
+
+        match = max([weak, normal], key=best_match)
+        self.assertIs(match, normal)
+
+        match = max([normal, weak], key=best_match)
+        self.assertIs(match, normal)
+
+    def test_strong_keywords_are_higher_priority(self):
+        weak = exceptions.ValidationError("Oh no!", path=[], validator="a")
+        normal = exceptions.ValidationError("Oh yes!", path=[], validator="b")
+        strong = exceptions.ValidationError("Oh fine!", path=[], validator="c")
+
+        best_match = exceptions.by_relevance(weak="a", strong="c")
+
+        match = max([weak, normal, strong], key=best_match)
+        self.assertIs(match, strong)
+
+        match = max([strong, normal, weak], key=best_match)
+        self.assertIs(match, strong)
+
+
+class TestErrorTree(TestCase):
+    def test_it_knows_how_many_total_errors_it_contains(self):
+        # FIXME: #442
+        errors = [
+            exceptions.ValidationError("Something", validator=i)
+            for i in range(8)
+        ]
+        tree = exceptions.ErrorTree(errors)
+        self.assertEqual(tree.total_errors, 8)
+
+    def test_it_contains_an_item_if_the_item_had_an_error(self):
+        errors = [exceptions.ValidationError("a message", path=["bar"])]
+        tree = exceptions.ErrorTree(errors)
+        self.assertIn("bar", tree)
+
+    def test_it_does_not_contain_an_item_if_the_item_had_no_error(self):
+        errors = [exceptions.ValidationError("a message", path=["bar"])]
+        tree = exceptions.ErrorTree(errors)
+        self.assertNotIn("foo", tree)
+
+    def test_keywords_that_failed_appear_in_errors_dict(self):
+        error = exceptions.ValidationError("a message", validator="foo")
+        tree = exceptions.ErrorTree([error])
+        self.assertEqual(tree.errors, {"foo": error})
+
+    def test_it_creates_a_child_tree_for_each_nested_path(self):
+        errors = [
+            exceptions.ValidationError("a bar message", path=["bar"]),
+            exceptions.ValidationError("a bar -> 0 message", path=["bar", 0]),
+        ]
+        tree = exceptions.ErrorTree(errors)
+        self.assertIn(0, tree["bar"])
+        self.assertNotIn(1, tree["bar"])
+
+    def test_children_have_their_errors_dicts_built(self):
+        e1, e2 = (
+            exceptions.ValidationError("1", validator="foo", path=["bar", 0]),
+            exceptions.ValidationError("2", validator="quux", path=["bar", 0]),
+        )
+        tree = exceptions.ErrorTree([e1, e2])
+        self.assertEqual(tree["bar"][0].errors, {"foo": e1, "quux": e2})
+
+    def test_multiple_errors_with_instance(self):
+        e1, e2 = (
+            exceptions.ValidationError(
+                "1",
+                validator="foo",
+                path=["bar", "bar2"],
+                instance="i1"),
+            exceptions.ValidationError(
+                "2",
+                validator="quux",
+                path=["foobar", 2],
+                instance="i2"),
+        )
+        exceptions.ErrorTree([e1, e2])
+
+    def test_it_does_not_contain_subtrees_that_are_not_in_the_instance(self):
+        error = exceptions.ValidationError("123", validator="foo", instance=[])
+        tree = exceptions.ErrorTree([error])
+
+        with self.assertRaises(IndexError):
+            tree[0]
+
+    def test_if_its_in_the_tree_anyhow_it_does_not_raise_an_error(self):
+        """
+        If a keyword refers to a path that isn't in the instance, the
+        tree still properly returns a subtree for that path.
+        """
+
+        error = exceptions.ValidationError(
+            "a message", validator="foo", instance={}, path=["foo"],
+        )
+        tree = exceptions.ErrorTree([error])
+        self.assertIsInstance(tree["foo"], exceptions.ErrorTree)
+
+    def test_iter(self):
+        e1, e2 = (
+            exceptions.ValidationError(
+                "1",
+                validator="foo",
+                path=["bar", "bar2"],
+                instance="i1"),
+            exceptions.ValidationError(
+                "2",
+                validator="quux",
+                path=["foobar", 2],
+                instance="i2"),
+        )
+        tree = exceptions.ErrorTree([e1, e2])
+        self.assertEqual(set(tree), {"bar", "foobar"})
+
+    def test_repr_single(self):
+        error = exceptions.ValidationError(
+            "1",
+            validator="foo",
+            path=["bar", "bar2"],
+            instance="i1",
+        )
+        tree = exceptions.ErrorTree([error])
+        self.assertEqual(repr(tree), "<ErrorTree (1 total error)>")
+
+    def test_repr_multiple(self):
+        e1, e2 = (
+            exceptions.ValidationError(
+                "1",
+                validator="foo",
+                path=["bar", "bar2"],
+                instance="i1"),
+            exceptions.ValidationError(
+                "2",
+                validator="quux",
+                path=["foobar", 2],
+                instance="i2"),
+        )
+        tree = exceptions.ErrorTree([e1, e2])
+        self.assertEqual(repr(tree), "<ErrorTree (2 total errors)>")
+
+    def test_repr_empty(self):
+        tree = exceptions.ErrorTree([])
+        self.assertEqual(repr(tree), "<ErrorTree (0 total errors)>")
+
+
+class TestErrorInitReprStr(TestCase):
+    def make_error(self, **kwargs):
+        defaults = dict(
+            message="hello",
+            validator="type",
+            validator_value="string",
+            instance=5,
+            schema={"type": "string"},
+        )
+        defaults.update(kwargs)
+        return exceptions.ValidationError(**defaults)
+
+    def assertShows(self, expected, **kwargs):
+        expected = textwrap.dedent(expected).rstrip("\n")
+
+        error = self.make_error(**kwargs)
+        message_line, _, rest = str(error).partition("\n")
+        self.assertEqual(message_line, error.message)
+        self.assertEqual(rest, expected)
+
+    def test_it_calls_super_and_sets_args(self):
+        error = self.make_error()
+        self.assertGreater(len(error.args), 1)
+
+    def test_repr(self):
+        self.assertEqual(
+            repr(exceptions.ValidationError(message="Hello!")),
+            "<ValidationError: 'Hello!'>",
+        )
+
+    def test_unset_error(self):
+        error = exceptions.ValidationError("message")
+        self.assertEqual(str(error), "message")
+
+        kwargs = {
+            "validator": "type",
+            "validator_value": "string",
+            "instance": 5,
+            "schema": {"type": "string"},
+        }
+        # Just the message should show if any of the attributes are unset
+        for attr in kwargs:
+            k = dict(kwargs)
+            del k[attr]
+            error = exceptions.ValidationError("message", **k)
+            self.assertEqual(str(error), "message")
+
+    def test_empty_paths(self):
+        self.assertShows(
+            """
+            Failed validating 'type' in schema:
+                {'type': 'string'}
+
+            On instance:
+                5
+            """,
+            path=[],
+            schema_path=[],
+        )
+
+    def test_one_item_paths(self):
+        self.assertShows(
+            """
+            Failed validating 'type' in schema:
+                {'type': 'string'}
+
+            On instance[0]:
+                5
+            """,
+            path=[0],
+            schema_path=["items"],
+        )
+
+    def test_multiple_item_paths(self):
+        self.assertShows(
+            """
+            Failed validating 'type' in schema['items'][0]:
+                {'type': 'string'}
+
+            On instance[0]['a']:
+                5
+            """,
+            path=[0, "a"],
+            schema_path=["items", 0, 1],
+        )
+
+    def test_uses_pprint(self):
+        self.assertShows(
+            """
+            Failed validating 'maxLength' in schema:
+                {0: 0,
+                 1: 1,
+                 2: 2,
+                 3: 3,
+                 4: 4,
+                 5: 5,
+                 6: 6,
+                 7: 7,
+                 8: 8,
+                 9: 9,
+                 10: 10,
+                 11: 11,
+                 12: 12,
+                 13: 13,
+                 14: 14,
+                 15: 15,
+                 16: 16,
+                 17: 17,
+                 18: 18,
+                 19: 19}
+
+            On instance:
+                [0,
+                 1,
+                 2,
+                 3,
+                 4,
+                 5,
+                 6,
+                 7,
+                 8,
+                 9,
+                 10,
+                 11,
+                 12,
+                 13,
+                 14,
+                 15,
+                 16,
+                 17,
+                 18,
+                 19,
+                 20,
+                 21,
+                 22,
+                 23,
+                 24]
+            """,
+            instance=list(range(25)),
+            schema=dict(zip(range(20), range(20))),
+            validator="maxLength",
+        )
+
+    def test_does_not_reorder_dicts(self):
+        self.assertShows(
+            """
+            Failed validating 'type' in schema:
+                {'do': 3, 'not': 7, 'sort': 37, 'me': 73}
+
+            On instance:
+                {'here': 73, 'too': 37, 'no': 7, 'sorting': 3}
+            """,
+            schema={
+                "do": 3,
+                "not": 7,
+                "sort": 37,
+                "me": 73,
+            },
+            instance={
+                "here": 73,
+                "too": 37,
+                "no": 7,
+                "sorting": 3,
+            },
+        )
+
+    def test_str_works_with_instances_having_overriden_eq_operator(self):
+        """
+        Check for #164 which rendered exceptions unusable when a
+        `ValidationError` involved instances with an `__eq__` method
+        that returned truthy values.
+        """
+
+        class DontEQMeBro:
+            def __eq__(this, other):  # pragma: no cover
+                self.fail("Don't!")
+
+            def __ne__(this, other):  # pragma: no cover
+                self.fail("Don't!")
+
+        instance = DontEQMeBro()
+        error = exceptions.ValidationError(
+            "a message",
+            validator="foo",
+            instance=instance,
+            validator_value="some",
+            schema="schema",
+        )
+        self.assertIn(repr(instance), str(error))
+
+
+class TestHashable(TestCase):
+    def test_hashable(self):
+        {exceptions.ValidationError("")}
+        {exceptions.SchemaError("")}
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_format.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_format.py
new file mode 100644
index 00000000..d829f984
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_format.py
@@ -0,0 +1,91 @@
+"""
+Tests for the parts of jsonschema related to the :kw:`format` keyword.
+"""
+
+from unittest import TestCase
+
+from jsonschema import FormatChecker, ValidationError
+from jsonschema.exceptions import FormatError
+from jsonschema.validators import Draft4Validator
+
+BOOM = ValueError("Boom!")
+BANG = ZeroDivisionError("Bang!")
+
+
+def boom(thing):
+    if thing == "bang":
+        raise BANG
+    raise BOOM
+
+
+class TestFormatChecker(TestCase):
+    def test_it_can_validate_no_formats(self):
+        checker = FormatChecker(formats=())
+        self.assertFalse(checker.checkers)
+
+    def test_it_raises_a_key_error_for_unknown_formats(self):
+        with self.assertRaises(KeyError):
+            FormatChecker(formats=["o noes"])
+
+    def test_it_can_register_cls_checkers(self):
+        original = dict(FormatChecker.checkers)
+        self.addCleanup(FormatChecker.checkers.pop, "boom")
+        with self.assertWarns(DeprecationWarning):
+            FormatChecker.cls_checks("boom")(boom)
+        self.assertEqual(
+            FormatChecker.checkers,
+            dict(original, boom=(boom, ())),
+        )
+
+    def test_it_can_register_checkers(self):
+        checker = FormatChecker()
+        checker.checks("boom")(boom)
+        self.assertEqual(
+            checker.checkers,
+            dict(FormatChecker.checkers, boom=(boom, ())),
+        )
+
+    def test_it_catches_registered_errors(self):
+        checker = FormatChecker()
+        checker.checks("boom", raises=type(BOOM))(boom)
+
+        with self.assertRaises(FormatError) as cm:
+            checker.check(instance=12, format="boom")
+
+        self.assertIs(cm.exception.cause, BOOM)
+        self.assertIs(cm.exception.__cause__, BOOM)
+        self.assertEqual(str(cm.exception), "12 is not a 'boom'")
+
+        # Unregistered errors should not be caught
+        with self.assertRaises(type(BANG)):
+            checker.check(instance="bang", format="boom")
+
+    def test_format_error_causes_become_validation_error_causes(self):
+        checker = FormatChecker()
+        checker.checks("boom", raises=ValueError)(boom)
+        validator = Draft4Validator({"format": "boom"}, format_checker=checker)
+
+        with self.assertRaises(ValidationError) as cm:
+            validator.validate("BOOM")
+
+        self.assertIs(cm.exception.cause, BOOM)
+        self.assertIs(cm.exception.__cause__, BOOM)
+
+    def test_format_checkers_come_with_defaults(self):
+        # This is bad :/ but relied upon.
+        # The docs for quite awhile recommended people do things like
+        # validate(..., format_checker=FormatChecker())
+        # We should change that, but we can't without deprecation...
+        checker = FormatChecker()
+        with self.assertRaises(FormatError):
+            checker.check(instance="not-an-ipv4", format="ipv4")
+
+    def test_repr(self):
+        checker = FormatChecker(formats=())
+        checker.checks("foo")(lambda thing: True)  # pragma: no cover
+        checker.checks("bar")(lambda thing: True)  # pragma: no cover
+        checker.checks("baz")(lambda thing: True)  # pragma: no cover
+        self.assertEqual(
+            repr(checker),
+            "<FormatChecker checkers=['bar', 'baz', 'foo']>",
+        )
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_jsonschema_test_suite.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_jsonschema_test_suite.py
new file mode 100644
index 00000000..282c1369
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_jsonschema_test_suite.py
@@ -0,0 +1,269 @@
+"""
+Test runner for the JSON Schema official test suite
+
+Tests comprehensive correctness of each draft's validator.
+
+See https://github.com/json-schema-org/JSON-Schema-Test-Suite for details.
+"""
+
+import sys
+
+from jsonschema.tests._suite import Suite
+import jsonschema
+
+SUITE = Suite()
+DRAFT3 = SUITE.version(name="draft3")
+DRAFT4 = SUITE.version(name="draft4")
+DRAFT6 = SUITE.version(name="draft6")
+DRAFT7 = SUITE.version(name="draft7")
+DRAFT201909 = SUITE.version(name="draft2019-09")
+DRAFT202012 = SUITE.version(name="draft2020-12")
+
+
+def skip(message, **kwargs):
+    def skipper(test):
+        if all(value == getattr(test, attr) for attr, value in kwargs.items()):
+            return message
+    return skipper
+
+
+def missing_format(Validator):
+    def missing_format(test):  # pragma: no cover
+        schema = test.schema
+        if (
+            schema is True
+            or schema is False
+            or "format" not in schema
+            or schema["format"] in Validator.FORMAT_CHECKER.checkers
+            or test.valid
+        ):
+            return
+
+        return f"Format checker {schema['format']!r} not found."
+    return missing_format
+
+
+def complex_email_validation(test):
+    if test.subject != "email":
+        return
+
+    message = "Complex email validation is (intentionally) unsupported."
+    return skip(
+        message=message,
+        description="an invalid domain",
+    )(test) or skip(
+        message=message,
+        description="an invalid IPv4-address-literal",
+    )(test) or skip(
+        message=message,
+        description="dot after local part is not valid",
+    )(test) or skip(
+        message=message,
+        description="dot before local part is not valid",
+    )(test) or skip(
+        message=message,
+        description="two subsequent dots inside local part are not valid",
+    )(test)
+
+
+if sys.version_info < (3, 9):  # pragma: no cover
+    message = "Rejecting leading zeros is 3.9+"
+    allowed_leading_zeros = skip(
+        message=message,
+        subject="ipv4",
+        description="invalid leading zeroes, as they are treated as octals",
+    )
+else:
+    def allowed_leading_zeros(test):  # pragma: no cover
+        return
+
+
+def leap_second(test):
+    message = "Leap seconds are unsupported."
+    return skip(
+        message=message,
+        subject="time",
+        description="a valid time string with leap second",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="a valid time string with leap second, Zulu",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="a valid time string with leap second with offset",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="valid leap second, positive time-offset",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="valid leap second, negative time-offset",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="valid leap second, large positive time-offset",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="valid leap second, large negative time-offset",
+    )(test) or skip(
+        message=message,
+        subject="time",
+        description="valid leap second, zero time-offset",
+    )(test) or skip(
+        message=message,
+        subject="date-time",
+        description="a valid date-time with a leap second, UTC",
+    )(test) or skip(
+        message=message,
+        subject="date-time",
+        description="a valid date-time with a leap second, with minus offset",
+    )(test)
+
+
+TestDraft3 = DRAFT3.to_unittest_testcase(
+    DRAFT3.cases(),
+    DRAFT3.format_cases(),
+    DRAFT3.optional_cases_of(name="bignum"),
+    DRAFT3.optional_cases_of(name="non-bmp-regex"),
+    DRAFT3.optional_cases_of(name="zeroTerminatedFloats"),
+    Validator=jsonschema.Draft3Validator,
+    format_checker=jsonschema.Draft3Validator.FORMAT_CHECKER,
+    skip=lambda test: (
+        missing_format(jsonschema.Draft3Validator)(test)
+        or complex_email_validation(test)
+    ),
+)
+
+
+TestDraft4 = DRAFT4.to_unittest_testcase(
+    DRAFT4.cases(),
+    DRAFT4.format_cases(),
+    DRAFT4.optional_cases_of(name="bignum"),
+    DRAFT4.optional_cases_of(name="float-overflow"),
+    DRAFT4.optional_cases_of(name="id"),
+    DRAFT4.optional_cases_of(name="non-bmp-regex"),
+    DRAFT4.optional_cases_of(name="zeroTerminatedFloats"),
+    Validator=jsonschema.Draft4Validator,
+    format_checker=jsonschema.Draft4Validator.FORMAT_CHECKER,
+    skip=lambda test: (
+        allowed_leading_zeros(test)
+        or leap_second(test)
+        or missing_format(jsonschema.Draft4Validator)(test)
+        or complex_email_validation(test)
+    ),
+)
+
+
+TestDraft6 = DRAFT6.to_unittest_testcase(
+    DRAFT6.cases(),
+    DRAFT6.format_cases(),
+    DRAFT6.optional_cases_of(name="bignum"),
+    DRAFT6.optional_cases_of(name="float-overflow"),
+    DRAFT6.optional_cases_of(name="id"),
+    DRAFT6.optional_cases_of(name="non-bmp-regex"),
+    Validator=jsonschema.Draft6Validator,
+    format_checker=jsonschema.Draft6Validator.FORMAT_CHECKER,
+    skip=lambda test: (
+        allowed_leading_zeros(test)
+        or leap_second(test)
+        or missing_format(jsonschema.Draft6Validator)(test)
+        or complex_email_validation(test)
+    ),
+)
+
+
+TestDraft7 = DRAFT7.to_unittest_testcase(
+    DRAFT7.cases(),
+    DRAFT7.format_cases(),
+    DRAFT7.optional_cases_of(name="bignum"),
+    DRAFT7.optional_cases_of(name="cross-draft"),
+    DRAFT7.optional_cases_of(name="float-overflow"),
+    DRAFT6.optional_cases_of(name="id"),
+    DRAFT7.optional_cases_of(name="non-bmp-regex"),
+    DRAFT7.optional_cases_of(name="unknownKeyword"),
+    Validator=jsonschema.Draft7Validator,
+    format_checker=jsonschema.Draft7Validator.FORMAT_CHECKER,
+    skip=lambda test: (
+        allowed_leading_zeros(test)
+        or leap_second(test)
+        or missing_format(jsonschema.Draft7Validator)(test)
+        or complex_email_validation(test)
+    ),
+)
+
+
+TestDraft201909 = DRAFT201909.to_unittest_testcase(
+    DRAFT201909.cases(),
+    DRAFT201909.optional_cases_of(name="anchor"),
+    DRAFT201909.optional_cases_of(name="bignum"),
+    DRAFT201909.optional_cases_of(name="cross-draft"),
+    DRAFT201909.optional_cases_of(name="float-overflow"),
+    DRAFT201909.optional_cases_of(name="id"),
+    DRAFT201909.optional_cases_of(name="no-schema"),
+    DRAFT201909.optional_cases_of(name="non-bmp-regex"),
+    DRAFT201909.optional_cases_of(name="refOfUnknownKeyword"),
+    DRAFT201909.optional_cases_of(name="unknownKeyword"),
+    Validator=jsonschema.Draft201909Validator,
+    skip=skip(
+        message="Vocabulary support is still in-progress.",
+        subject="vocabulary",
+        description=(
+            "no validation: invalid number, but it still validates"
+        ),
+    ),
+)
+
+
+TestDraft201909Format = DRAFT201909.to_unittest_testcase(
+    DRAFT201909.format_cases(),
+    name="TestDraft201909Format",
+    Validator=jsonschema.Draft201909Validator,
+    format_checker=jsonschema.Draft201909Validator.FORMAT_CHECKER,
+    skip=lambda test: (
+        complex_email_validation(test)
+        or allowed_leading_zeros(test)
+        or leap_second(test)
+        or missing_format(jsonschema.Draft201909Validator)(test)
+        or complex_email_validation(test)
+    ),
+)
+
+
+TestDraft202012 = DRAFT202012.to_unittest_testcase(
+    DRAFT202012.cases(),
+    DRAFT201909.optional_cases_of(name="anchor"),
+    DRAFT202012.optional_cases_of(name="bignum"),
+    DRAFT202012.optional_cases_of(name="cross-draft"),
+    DRAFT202012.optional_cases_of(name="float-overflow"),
+    DRAFT202012.optional_cases_of(name="id"),
+    DRAFT202012.optional_cases_of(name="no-schema"),
+    DRAFT202012.optional_cases_of(name="non-bmp-regex"),
+    DRAFT202012.optional_cases_of(name="refOfUnknownKeyword"),
+    DRAFT202012.optional_cases_of(name="unknownKeyword"),
+    Validator=jsonschema.Draft202012Validator,
+    skip=skip(
+        message="Vocabulary support is still in-progress.",
+        subject="vocabulary",
+        description=(
+            "no validation: invalid number, but it still validates"
+        ),
+    ),
+)
+
+
+TestDraft202012Format = DRAFT202012.to_unittest_testcase(
+    DRAFT202012.format_cases(),
+    name="TestDraft202012Format",
+    Validator=jsonschema.Draft202012Validator,
+    format_checker=jsonschema.Draft202012Validator.FORMAT_CHECKER,
+    skip=lambda test: (
+        complex_email_validation(test)
+        or allowed_leading_zeros(test)
+        or leap_second(test)
+        or missing_format(jsonschema.Draft202012Validator)(test)
+        or complex_email_validation(test)
+    ),
+)
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_types.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_types.py
new file mode 100644
index 00000000..bd97b180
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_types.py
@@ -0,0 +1,221 @@
+"""
+Tests for the `TypeChecker`-based type interface.
+
+The actual correctness of the type checking is handled in
+`test_jsonschema_test_suite`; these tests check that TypeChecker
+functions correctly at a more granular level.
+"""
+from collections import namedtuple
+from unittest import TestCase
+
+from jsonschema import ValidationError, _keywords
+from jsonschema._types import TypeChecker
+from jsonschema.exceptions import UndefinedTypeCheck, UnknownType
+from jsonschema.validators import Draft202012Validator, extend
+
+
+def equals_2(checker, instance):
+    return instance == 2
+
+
+def is_namedtuple(instance):
+    return isinstance(instance, tuple) and getattr(instance, "_fields", None)
+
+
+def is_object_or_named_tuple(checker, instance):
+    if Draft202012Validator.TYPE_CHECKER.is_type(instance, "object"):
+        return True
+    return is_namedtuple(instance)
+
+
+class TestTypeChecker(TestCase):
+    def test_is_type(self):
+        checker = TypeChecker({"two": equals_2})
+        self.assertEqual(
+            (
+                checker.is_type(instance=2, type="two"),
+                checker.is_type(instance="bar", type="two"),
+            ),
+            (True, False),
+        )
+
+    def test_is_unknown_type(self):
+        with self.assertRaises(UndefinedTypeCheck) as e:
+            TypeChecker().is_type(4, "foobar")
+        self.assertIn(
+            "'foobar' is unknown to this type checker",
+            str(e.exception),
+        )
+        self.assertTrue(
+            e.exception.__suppress_context__,
+            msg="Expected the internal KeyError to be hidden.",
+        )
+
+    def test_checks_can_be_added_at_init(self):
+        checker = TypeChecker({"two": equals_2})
+        self.assertEqual(checker, TypeChecker().redefine("two", equals_2))
+
+    def test_redefine_existing_type(self):
+        self.assertEqual(
+            TypeChecker().redefine("two", object()).redefine("two", equals_2),
+            TypeChecker().redefine("two", equals_2),
+        )
+
+    def test_remove(self):
+        self.assertEqual(
+            TypeChecker({"two": equals_2}).remove("two"),
+            TypeChecker(),
+        )
+
+    def test_remove_unknown_type(self):
+        with self.assertRaises(UndefinedTypeCheck) as context:
+            TypeChecker().remove("foobar")
+        self.assertIn("foobar", str(context.exception))
+
+    def test_redefine_many(self):
+        self.assertEqual(
+            TypeChecker().redefine_many({"foo": int, "bar": str}),
+            TypeChecker().redefine("foo", int).redefine("bar", str),
+        )
+
+    def test_remove_multiple(self):
+        self.assertEqual(
+            TypeChecker({"foo": int, "bar": str}).remove("foo", "bar"),
+            TypeChecker(),
+        )
+
+    def test_type_check_can_raise_key_error(self):
+        """
+        Make sure no one writes:
+
+            try:
+                self._type_checkers[type](...)
+            except KeyError:
+
+        ignoring the fact that the function itself can raise that.
+        """
+
+        error = KeyError("Stuff")
+
+        def raises_keyerror(checker, instance):
+            raise error
+
+        with self.assertRaises(KeyError) as context:
+            TypeChecker({"foo": raises_keyerror}).is_type(4, "foo")
+
+        self.assertIs(context.exception, error)
+
+    def test_repr(self):
+        checker = TypeChecker({"foo": is_namedtuple, "bar": is_namedtuple})
+        self.assertEqual(repr(checker), "<TypeChecker types={'bar', 'foo'}>")
+
+
+class TestCustomTypes(TestCase):
+    def test_simple_type_can_be_extended(self):
+        def int_or_str_int(checker, instance):
+            if not isinstance(instance, (int, str)):
+                return False
+            try:
+                int(instance)
+            except ValueError:
+                return False
+            return True
+
+        CustomValidator = extend(
+            Draft202012Validator,
+            type_checker=Draft202012Validator.TYPE_CHECKER.redefine(
+                "integer", int_or_str_int,
+            ),
+        )
+        validator = CustomValidator({"type": "integer"})
+
+        validator.validate(4)
+        validator.validate("4")
+
+        with self.assertRaises(ValidationError):
+            validator.validate(4.4)
+
+        with self.assertRaises(ValidationError):
+            validator.validate("foo")
+
+    def test_object_can_be_extended(self):
+        schema = {"type": "object"}
+
+        Point = namedtuple("Point", ["x", "y"])
+
+        type_checker = Draft202012Validator.TYPE_CHECKER.redefine(
+            "object", is_object_or_named_tuple,
+        )
+
+        CustomValidator = extend(
+            Draft202012Validator,
+            type_checker=type_checker,
+        )
+        validator = CustomValidator(schema)
+
+        validator.validate(Point(x=4, y=5))
+
+    def test_object_extensions_require_custom_validators(self):
+        schema = {"type": "object", "required": ["x"]}
+
+        type_checker = Draft202012Validator.TYPE_CHECKER.redefine(
+            "object", is_object_or_named_tuple,
+        )
+
+        CustomValidator = extend(
+            Draft202012Validator,
+            type_checker=type_checker,
+        )
+        validator = CustomValidator(schema)
+
+        Point = namedtuple("Point", ["x", "y"])
+        # Cannot handle required
+        with self.assertRaises(ValidationError):
+            validator.validate(Point(x=4, y=5))
+
+    def test_object_extensions_can_handle_custom_validators(self):
+        schema = {
+            "type": "object",
+            "required": ["x"],
+            "properties": {"x": {"type": "integer"}},
+        }
+
+        type_checker = Draft202012Validator.TYPE_CHECKER.redefine(
+            "object", is_object_or_named_tuple,
+        )
+
+        def coerce_named_tuple(fn):
+            def coerced(validator, value, instance, schema):
+                if is_namedtuple(instance):
+                    instance = instance._asdict()
+                return fn(validator, value, instance, schema)
+            return coerced
+
+        required = coerce_named_tuple(_keywords.required)
+        properties = coerce_named_tuple(_keywords.properties)
+
+        CustomValidator = extend(
+            Draft202012Validator,
+            type_checker=type_checker,
+            validators={"required": required, "properties": properties},
+        )
+
+        validator = CustomValidator(schema)
+
+        Point = namedtuple("Point", ["x", "y"])
+        # Can now process required and properties
+        validator.validate(Point(x=4, y=5))
+
+        with self.assertRaises(ValidationError):
+            validator.validate(Point(x="not an integer", y=5))
+
+        # As well as still handle objects.
+        validator.validate({"x": 4, "y": 5})
+
+        with self.assertRaises(ValidationError):
+            validator.validate({"x": "not an integer", "y": 5})
+
+    def test_unknown_type(self):
+        with self.assertRaises(UnknownType) as e:
+            Draft202012Validator({}).is_type(12, "some unknown type")
+        self.assertIn("'some unknown type'", str(e.exception))
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_utils.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_utils.py
new file mode 100644
index 00000000..d9764b0f
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_utils.py
@@ -0,0 +1,138 @@
+from math import nan
+from unittest import TestCase
+
+from jsonschema._utils import equal
+
+
+class TestEqual(TestCase):
+    def test_none(self):
+        self.assertTrue(equal(None, None))
+
+    def test_nan(self):
+        self.assertTrue(equal(nan, nan))
+
+
+class TestDictEqual(TestCase):
+    def test_equal_dictionaries(self):
+        dict_1 = {"a": "b", "c": "d"}
+        dict_2 = {"c": "d", "a": "b"}
+        self.assertTrue(equal(dict_1, dict_2))
+
+    def test_equal_dictionaries_with_nan(self):
+        dict_1 = {"a": nan, "c": "d"}
+        dict_2 = {"c": "d", "a": nan}
+        self.assertTrue(equal(dict_1, dict_2))
+
+    def test_missing_key(self):
+        dict_1 = {"a": "b", "c": "d"}
+        dict_2 = {"c": "d", "x": "b"}
+        self.assertFalse(equal(dict_1, dict_2))
+
+    def test_additional_key(self):
+        dict_1 = {"a": "b", "c": "d"}
+        dict_2 = {"c": "d", "a": "b", "x": "x"}
+        self.assertFalse(equal(dict_1, dict_2))
+
+    def test_missing_value(self):
+        dict_1 = {"a": "b", "c": "d"}
+        dict_2 = {"c": "d", "a": "x"}
+        self.assertFalse(equal(dict_1, dict_2))
+
+    def test_empty_dictionaries(self):
+        dict_1 = {}
+        dict_2 = {}
+        self.assertTrue(equal(dict_1, dict_2))
+
+    def test_one_none(self):
+        dict_1 = None
+        dict_2 = {"a": "b", "c": "d"}
+        self.assertFalse(equal(dict_1, dict_2))
+
+    def test_same_item(self):
+        dict_1 = {"a": "b", "c": "d"}
+        self.assertTrue(equal(dict_1, dict_1))
+
+    def test_nested_equal(self):
+        dict_1 = {"a": {"a": "b", "c": "d"}, "c": "d"}
+        dict_2 = {"c": "d", "a": {"a": "b", "c": "d"}}
+        self.assertTrue(equal(dict_1, dict_2))
+
+    def test_nested_dict_unequal(self):
+        dict_1 = {"a": {"a": "b", "c": "d"}, "c": "d"}
+        dict_2 = {"c": "d", "a": {"a": "b", "c": "x"}}
+        self.assertFalse(equal(dict_1, dict_2))
+
+    def test_mixed_nested_equal(self):
+        dict_1 = {"a": ["a", "b", "c", "d"], "c": "d"}
+        dict_2 = {"c": "d", "a": ["a", "b", "c", "d"]}
+        self.assertTrue(equal(dict_1, dict_2))
+
+    def test_nested_list_unequal(self):
+        dict_1 = {"a": ["a", "b", "c", "d"], "c": "d"}
+        dict_2 = {"c": "d", "a": ["b", "c", "d", "a"]}
+        self.assertFalse(equal(dict_1, dict_2))
+
+
+class TestListEqual(TestCase):
+    def test_equal_lists(self):
+        list_1 = ["a", "b", "c"]
+        list_2 = ["a", "b", "c"]
+        self.assertTrue(equal(list_1, list_2))
+
+    def test_equal_lists_with_nan(self):
+        list_1 = ["a", nan, "c"]
+        list_2 = ["a", nan, "c"]
+        self.assertTrue(equal(list_1, list_2))
+
+    def test_unsorted_lists(self):
+        list_1 = ["a", "b", "c"]
+        list_2 = ["b", "b", "a"]
+        self.assertFalse(equal(list_1, list_2))
+
+    def test_first_list_larger(self):
+        list_1 = ["a", "b", "c"]
+        list_2 = ["a", "b"]
+        self.assertFalse(equal(list_1, list_2))
+
+    def test_second_list_larger(self):
+        list_1 = ["a", "b"]
+        list_2 = ["a", "b", "c"]
+        self.assertFalse(equal(list_1, list_2))
+
+    def test_list_with_none_unequal(self):
+        list_1 = ["a", "b", None]
+        list_2 = ["a", "b", "c"]
+        self.assertFalse(equal(list_1, list_2))
+
+        list_1 = ["a", "b", None]
+        list_2 = [None, "b", "c"]
+        self.assertFalse(equal(list_1, list_2))
+
+    def test_list_with_none_equal(self):
+        list_1 = ["a", None, "c"]
+        list_2 = ["a", None, "c"]
+        self.assertTrue(equal(list_1, list_2))
+
+    def test_empty_list(self):
+        list_1 = []
+        list_2 = []
+        self.assertTrue(equal(list_1, list_2))
+
+    def test_one_none(self):
+        list_1 = None
+        list_2 = []
+        self.assertFalse(equal(list_1, list_2))
+
+    def test_same_list(self):
+        list_1 = ["a", "b", "c"]
+        self.assertTrue(equal(list_1, list_1))
+
+    def test_equal_nested_lists(self):
+        list_1 = ["a", ["b", "c"], "d"]
+        list_2 = ["a", ["b", "c"], "d"]
+        self.assertTrue(equal(list_1, list_2))
+
+    def test_unequal_nested_lists(self):
+        list_1 = ["a", ["b", "c"], "d"]
+        list_2 = ["a", [], "c"]
+        self.assertFalse(equal(list_1, list_2))
diff --git a/.venv/lib/python3.12/site-packages/jsonschema/tests/test_validators.py b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_validators.py
new file mode 100644
index 00000000..28cc4027
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/jsonschema/tests/test_validators.py
@@ -0,0 +1,2575 @@
+from __future__ import annotations
+
+from collections import deque, namedtuple
+from contextlib import contextmanager
+from decimal import Decimal
+from io import BytesIO
+from typing import Any
+from unittest import TestCase, mock
+from urllib.request import pathname2url
+import json
+import os
+import sys
+import tempfile
+import warnings
+
+from attrs import define, field
+from referencing.jsonschema import DRAFT202012
+import referencing.exceptions
+
+from jsonschema import (
+    FormatChecker,
+    TypeChecker,
+    exceptions,
+    protocols,
+    validators,
+)
+
+
+def fail(validator, errors, instance, schema):
+    for each in errors:
+        each.setdefault("message", "You told me to fail!")
+        yield exceptions.ValidationError(**each)
+
+
+class TestCreateAndExtend(TestCase):
+    def setUp(self):
+        self.addCleanup(
+            self.assertEqual,
+            validators._META_SCHEMAS,
+            dict(validators._META_SCHEMAS),
+        )
+        self.addCleanup(
+            self.assertEqual,
+            validators._VALIDATORS,
+            dict(validators._VALIDATORS),
+        )
+
+        self.meta_schema = {"$id": "some://meta/schema"}
+        self.validators = {"fail": fail}
+        self.type_checker = TypeChecker()
+        self.Validator = validators.create(
+            meta_schema=self.meta_schema,
+            validators=self.validators,
+            type_checker=self.type_checker,
+        )
+
+    def test_attrs(self):
+        self.assertEqual(
+            (
+                self.Validator.VALIDATORS,
+                self.Validator.META_SCHEMA,
+                self.Validator.TYPE_CHECKER,
+            ), (
+                self.validators,
+                self.meta_schema,
+                self.type_checker,
+            ),
+        )
+
+    def test_init(self):
+        schema = {"fail": []}
+        self.assertEqual(self.Validator(schema).schema, schema)
+
+    def test_iter_errors_successful(self):
+        schema = {"fail": []}
+        validator = self.Validator(schema)
+
+        errors = list(validator.iter_errors("hello"))
+        self.assertEqual(errors, [])
+
+    def test_iter_errors_one_error(self):
+        schema = {"fail": [{"message": "Whoops!"}]}
+        validator = self.Validator(schema)
+
+        expected_error = exceptions.ValidationError(
+            "Whoops!",
+            instance="goodbye",
+            schema=schema,
+            validator="fail",
+            validator_value=[{"message": "Whoops!"}],
+            schema_path=deque(["fail"]),
+        )
+
+        errors = list(validator.iter_errors("goodbye"))
+        self.assertEqual(len(errors), 1)
+        self.assertEqual(errors[0]._contents(), expected_error._contents())
+
+    def test_iter_errors_multiple_errors(self):
+        schema = {
+            "fail": [
+                {"message": "First"},
+                {"message": "Second!", "validator": "asdf"},
+                {"message": "Third"},
+            ],
+        }
+        validator = self.Validator(schema)
+
+        errors = list(validator.iter_errors("goodbye"))
+        self.assertEqual(len(errors), 3)
+
+    def test_if_a_version_is_provided_it_is_registered(self):
+        Validator = validators.create(
+            meta_schema={"$id": "something"},
+            version="my version",
+        )
+        self.addCleanup(validators._META_SCHEMAS.pop, "something")
+        self.addCleanup(validators._VALIDATORS.pop, "my version")
+        self.assertEqual(Validator.__name__, "MyVersionValidator")
+        self.assertEqual(Validator.__qualname__, "MyVersionValidator")
+
+    def test_repr(self):
+        Validator = validators.create(
+            meta_schema={"$id": "something"},
+            version="my version",
+        )
+        self.addCleanup(validators._META_SCHEMAS.pop, "something")
+        self.addCleanup(validators._VALIDATORS.pop, "my version")
+        self.assertEqual(
+            repr(Validator({})),
+            "MyVersionValidator(schema={}, format_checker=None)",
+        )
+
+    def test_long_repr(self):
+        Validator = validators.create(
+            meta_schema={"$id": "something"},
+            version="my version",
+        )
+        self.addCleanup(validators._META_SCHEMAS.pop, "something")
+        self.addCleanup(validators._VALIDATORS.pop, "my version")
+        self.assertEqual(
+            repr(Validator({"a": list(range(1000))})), (
+                "MyVersionValidator(schema={'a': [0, 1, 2, 3, 4, 5, ...]}, "
+                "format_checker=None)"
+            ),
+        )
+
+    def test_repr_no_version(self):
+        Validator = validators.create(meta_schema={})
+        self.assertEqual(
+            repr(Validator({})),
+            "Validator(schema={}, format_checker=None)",
+        )
+
+    def test_dashes_are_stripped_from_validator_names(self):
+        Validator = validators.create(
+            meta_schema={"$id": "something"},
+            version="foo-bar",
+        )
+        self.addCleanup(validators._META_SCHEMAS.pop, "something")
+        self.addCleanup(validators._VALIDATORS.pop, "foo-bar")
+        self.assertEqual(Validator.__qualname__, "FooBarValidator")
+
+    def test_if_a_version_is_not_provided_it_is_not_registered(self):
+        original = dict(validators._META_SCHEMAS)
+        validators.create(meta_schema={"id": "id"})
+        self.assertEqual(validators._META_SCHEMAS, original)
+
+    def test_validates_registers_meta_schema_id(self):
+        meta_schema_key = "meta schema id"
+        my_meta_schema = {"id": meta_schema_key}
+
+        validators.create(
+            meta_schema=my_meta_schema,
+            version="my version",
+            id_of=lambda s: s.get("id", ""),
+        )
+        self.addCleanup(validators._META_SCHEMAS.pop, meta_schema_key)
+        self.addCleanup(validators._VALIDATORS.pop, "my version")
+
+        self.assertIn(meta_schema_key, validators._META_SCHEMAS)
+
+    def test_validates_registers_meta_schema_draft6_id(self):
+        meta_schema_key = "meta schema $id"
+        my_meta_schema = {"$id": meta_schema_key}
+
+        validators.create(
+            meta_schema=my_meta_schema,
+            version="my version",
+        )
+        self.addCleanup(validators._META_SCHEMAS.pop, meta_schema_key)
+        self.addCleanup(validators._VALIDATORS.pop, "my version")
+
+        self.assertIn(meta_schema_key, validators._META_SCHEMAS)
+
+    def test_create_default_types(self):
+        Validator = validators.create(meta_schema={}, validators=())
+        self.assertTrue(
+            all(
+                Validator({}).is_type(instance=instance, type=type)
+                for type, instance in [
+                    ("array", []),
+                    ("boolean", True),
+                    ("integer", 12),
+                    ("null", None),
+                    ("number", 12.0),
+                    ("object", {}),
+                    ("string", "foo"),
+                ]
+            ),
+        )
+
+    def test_check_schema_with_different_metaschema(self):
+        """
+        One can create a validator class whose metaschema uses a different
+        dialect than itself.
+        """
+
+        NoEmptySchemasValidator = validators.create(
+            meta_schema={
+                "$schema": validators.Draft202012Validator.META_SCHEMA["$id"],
+                "not": {"const": {}},
+            },
+        )
+        NoEmptySchemasValidator.check_schema({"foo": "bar"})
+
+        with self.assertRaises(exceptions.SchemaError):
+            NoEmptySchemasValidator.check_schema({})
+
+        NoEmptySchemasValidator({"foo": "bar"}).validate("foo")
+
+    def test_check_schema_with_different_metaschema_defaults_to_self(self):
+        """
+        A validator whose metaschema doesn't declare $schema defaults to its
+        own validation behavior, not the latest "normal" specification.
+        """
+
+        NoEmptySchemasValidator = validators.create(
+            meta_schema={"fail": [{"message": "Meta schema whoops!"}]},
+            validators={"fail": fail},
+        )
+        with self.assertRaises(exceptions.SchemaError):
+            NoEmptySchemasValidator.check_schema({})
+
+    def test_extend(self):
+        original = dict(self.Validator.VALIDATORS)
+        new = object()
+
+        Extended = validators.extend(
+            self.Validator,
+            validators={"new": new},
+        )
+        self.assertEqual(
+            (
+                Extended.VALIDATORS,
+                Extended.META_SCHEMA,
+                Extended.TYPE_CHECKER,
+                self.Validator.VALIDATORS,
+            ), (
+                dict(original, new=new),
+                self.Validator.META_SCHEMA,
+                self.Validator.TYPE_CHECKER,
+                original,
+            ),
+        )
+
+    def test_extend_idof(self):
+        """
+        Extending a validator preserves its notion of schema IDs.
+        """
+        def id_of(schema):
+            return schema.get("__test__", self.Validator.ID_OF(schema))
+        correct_id = "the://correct/id/"
+        meta_schema = {
+            "$id": "the://wrong/id/",
+            "__test__": correct_id,
+        }
+        Original = validators.create(
+            meta_schema=meta_schema,
+            validators=self.validators,
+            type_checker=self.type_checker,
+            id_of=id_of,
+        )
+        self.assertEqual(Original.ID_OF(Original.META_SCHEMA), correct_id)
+
+        Derived = validators.extend(Original)
+        self.assertEqual(Derived.ID_OF(Derived.META_SCHEMA), correct_id)
+
+    def test_extend_applicable_validators(self):
+        """
+        Extending a validator preserves its notion of applicable validators.
+        """
+
+        schema = {
+            "$defs": {"test": {"type": "number"}},
+            "$ref": "#/$defs/test",
+            "maximum": 1,
+        }
+
+        draft4 = validators.Draft4Validator(schema)
+        self.assertTrue(draft4.is_valid(37))  # as $ref ignores siblings
+
+        Derived = validators.extend(validators.Draft4Validator)
+        self.assertTrue(Derived(schema).is_valid(37))
+
+
+class TestValidationErrorMessages(TestCase):
+    def message_for(self, instance, schema, *args, **kwargs):
+        cls = kwargs.pop("cls", validators._LATEST_VERSION)
+        cls.check_schema(schema)
+        validator = cls(schema, *args, **kwargs)
+        errors = list(validator.iter_errors(instance))
+        self.assertTrue(errors, msg=f"No errors were raised for {instance!r}")
+        self.assertEqual(
+            len(errors),
+            1,
+            msg=f"Expected exactly one error, found {errors!r}",
+        )
+        return errors[0].message
+
+    def test_single_type_failure(self):
+        message = self.message_for(instance=1, schema={"type": "string"})
+        self.assertEqual(message, "1 is not of type 'string'")
+
+    def test_single_type_list_failure(self):
+        message = self.message_for(instance=1, schema={"type": ["string"]})
+        self.assertEqual(message, "1 is not of type 'string'")
+
+    def test_multiple_type_failure(self):
+        types = "string", "object"
+        message = self.message_for(instance=1, schema={"type": list(types)})
+        self.assertEqual(message, "1 is not of type 'string', 'object'")
+
+    def test_object_with_named_type_failure(self):
+        schema = {"type": [{"name": "Foo", "minimum": 3}]}
+        message = self.message_for(
+            instance=1,
+            schema=schema,
+            cls=validators.Draft3Validator,
+        )
+        self.assertEqual(message, "1 is not of type 'Foo'")
+
+    def test_minimum(self):
+        message = self.message_for(instance=1, schema={"minimum": 2})
+        self.assertEqual(message, "1 is less than the minimum of 2")
+
+    def test_maximum(self):
+        message = self.message_for(instance=1, schema={"maximum": 0})
+        self.assertEqual(message, "1 is greater than the maximum of 0")
+
+    def test_dependencies_single_element(self):
+        depend, on = "bar", "foo"
+        schema = {"dependencies": {depend: on}}
+        message = self.message_for(
+            instance={"bar": 2},
+            schema=schema,
+            cls=validators.Draft3Validator,
+        )
+        self.assertEqual(message, "'foo' is a dependency of 'bar'")
+
+    def test_object_without_title_type_failure_draft3(self):
+        type = {"type": [{"minimum": 3}]}
+        message = self.message_for(
+            instance=1,
+            schema={"type": [type]},
+            cls=validators.Draft3Validator,
+        )
+        self.assertEqual(
+            message,
+            "1 is not of type {'type': [{'minimum': 3}]}",
+        )
+
+    def test_dependencies_list_draft3(self):
+        depend, on = "bar", "foo"
+        schema = {"dependencies": {depend: [on]}}
+        message = self.message_for(
+            instance={"bar": 2},
+            schema=schema,
+            cls=validators.Draft3Validator,
+        )
+        self.assertEqual(message, "'foo' is a dependency of 'bar'")
+
+    def test_dependencies_list_draft7(self):
+        depend, on = "bar", "foo"
+        schema = {"dependencies": {depend: [on]}}
+        message = self.message_for(
+            instance={"bar": 2},
+            schema=schema,
+            cls=validators.Draft7Validator,
+        )
+        self.assertEqual(message, "'foo' is a dependency of 'bar'")
+
+    def test_additionalItems_single_failure(self):
+        message = self.message_for(
+            instance=[2],
+            schema={"items": [], "additionalItems": False},
+            cls=validators.Draft3Validator,
+        )
+        self.assertIn("(2 was unexpected)", message)
+
+    def test_additionalItems_multiple_failures(self):
+        message = self.message_for(
+            instance=[1, 2, 3],
+            schema={"items": [], "additionalItems": False},
+            cls=validators.Draft3Validator,
+        )
+        self.assertIn("(1, 2, 3 were unexpected)", message)
+
+    def test_additionalProperties_single_failure(self):
+        additional = "foo"
+        schema = {"additionalProperties": False}
+        message = self.message_for(instance={additional: 2}, schema=schema)
+        self.assertIn("('foo' was unexpected)", message)
+
+    def test_additionalProperties_multiple_failures(self):
+        schema = {"additionalProperties": False}
+        message = self.message_for(
+            instance=dict.fromkeys(["foo", "bar"]),
+            schema=schema,
+        )
+
+        self.assertIn(repr("foo"), message)
+        self.assertIn(repr("bar"), message)
+        self.assertIn("were unexpected)", message)
+
+    def test_const(self):
+        schema = {"const": 12}
+        message = self.message_for(
+            instance={"foo": "bar"},
+            schema=schema,
+        )
+        self.assertIn("12 was expected", message)
+
+    def test_contains_draft_6(self):
+        schema = {"contains": {"const": 12}}
+        message = self.message_for(
+            instance=[2, {}, []],
+            schema=schema,
+            cls=validators.Draft6Validator,
+        )
+        self.assertEqual(
+            message,
+            "None of [2, {}, []] are valid under the given schema",
+        )
+
+    def test_invalid_format_default_message(self):
+        checker = FormatChecker(formats=())
+        checker.checks("thing")(lambda value: False)
+
+        schema = {"format": "thing"}
+        message = self.message_for(
+            instance="bla",
+            schema=schema,
+            format_checker=checker,
+        )
+
+        self.assertIn(repr("bla"), message)
+        self.assertIn(repr("thing"), message)
+        self.assertIn("is not a", message)
+
+    def test_additionalProperties_false_patternProperties(self):
+        schema = {"type": "object",
+                  "additionalProperties": False,
+                  "patternProperties": {
+                      "^abc$": {"type": "string"},
+                      "^def$": {"type": "string"},
+                  }}
+        message = self.message_for(
+            instance={"zebra": 123},
+            schema=schema,
+            cls=validators.Draft4Validator,
+        )
+        self.assertEqual(
+            message,
+            "{} does not match any of the regexes: {}, {}".format(
+                repr("zebra"), repr("^abc$"), repr("^def$"),
+            ),
+        )
+        message = self.message_for(
+            instance={"zebra": 123, "fish": 456},
+            schema=schema,
+            cls=validators.Draft4Validator,
+        )
+        self.assertEqual(
+            message,
+            "{}, {} do not match any of the regexes: {}, {}".format(
+                repr("fish"), repr("zebra"), repr("^abc$"), repr("^def$"),
+            ),
+        )
+
+    def test_False_schema(self):
+        message = self.message_for(
+            instance="something",
+            schema=False,
+        )
+        self.assertEqual(message, "False schema does not allow 'something'")
+
+    def test_multipleOf(self):
+        message = self.message_for(
+            instance=3,
+            schema={"multipleOf": 2},
+        )
+        self.assertEqual(message, "3 is not a multiple of 2")
+
+    def test_minItems(self):
+        message = self.message_for(instance=[], schema={"minItems": 2})
+        self.assertEqual(message, "[] is too short")
+
+    def test_maxItems(self):
+        message = self.message_for(instance=[1, 2, 3], schema={"maxItems": 2})
+        self.assertEqual(message, "[1, 2, 3] is too long")
+
+    def test_minItems_1(self):
+        message = self.message_for(instance=[], schema={"minItems": 1})
+        self.assertEqual(message, "[] should be non-empty")
+
+    def test_maxItems_0(self):
+        message = self.message_for(instance=[1, 2, 3], schema={"maxItems": 0})
+        self.assertEqual(message, "[1, 2, 3] is expected to be empty")
+
+    def test_minLength(self):
+        message = self.message_for(
+            instance="",
+            schema={"minLength": 2},
+        )
+        self.assertEqual(message, "'' is too short")
+
+    def test_maxLength(self):
+        message = self.message_for(
+            instance="abc",
+            schema={"maxLength": 2},
+        )
+        self.assertEqual(message, "'abc' is too long")
+
+    def test_minLength_1(self):
+        message = self.message_for(instance="", schema={"minLength": 1})
+        self.assertEqual(message, "'' should be non-empty")
+
+    def test_maxLength_0(self):
+        message = self.message_for(instance="abc", schema={"maxLength": 0})
+        self.assertEqual(message, "'abc' is expected to be empty")
+
+    def test_minProperties(self):
+        message = self.message_for(instance={}, schema={"minProperties": 2})
+        self.assertEqual(message, "{} does not have enough properties")
+
+    def test_maxProperties(self):
+        message = self.message_for(
+            instance={"a": {}, "b": {}, "c": {}},
+            schema={"maxProperties": 2},
+        )
+        self.assertEqual(
+            message,
+            "{'a': {}, 'b': {}, 'c': {}} has too many properties",
+        )
+
+    def test_minProperties_1(self):
+        message = self.message_for(instance={}, schema={"minProperties": 1})
+        self.assertEqual(message, "{} should be non-empty")
+
+    def test_maxProperties_0(self):
+        message = self.message_for(
+            instance={1: 2},
+            schema={"maxProperties": 0},
+        )
+        self.assertEqual(message, "{1: 2} is expected to be empty")
+
+    def test_prefixItems_with_items(self):
+        message = self.message_for(
+            instance=[1, 2, "foo"],
+            schema={"items": False, "prefixItems": [{}, {}]},
+        )
+        self.assertEqual(
+            message,
+            "Expected at most 2 items but found 1 extra: 'foo'",
+        )
+
+    def test_prefixItems_with_multiple_extra_items(self):
+        message = self.message_for(
+            instance=[1, 2, "foo", 5],
+            schema={"items": False, "prefixItems": [{}, {}]},
+        )
+        self.assertEqual(
+            message,
+            "Expected at most 2 items but found 2 extra: ['foo', 5]",
+        )
+
+    def test_pattern(self):
+        message = self.message_for(
+            instance="bbb",
+            schema={"pattern": "^a*$"},
+        )
+        self.assertEqual(message, "'bbb' does not match '^a*$'")
+
+    def test_does_not_contain(self):
+        message = self.message_for(
+            instance=[],
+            schema={"contains": {"type": "string"}},
+        )
+        self.assertEqual(
+            message,
+            "[] does not contain items matching the given schema",
+        )
+
+    def test_contains_too_few(self):
+        message = self.message_for(
+            instance=["foo", 1],
+            schema={"contains": {"type": "string"}, "minContains": 2},
+        )
+        self.assertEqual(
+            message,
+            "Too few items match the given schema "
+            "(expected at least 2 but only 1 matched)",
+        )
+
+    def test_contains_too_few_both_constrained(self):
+        message = self.message_for(
+            instance=["foo", 1],
+            schema={
+                "contains": {"type": "string"},
+                "minContains": 2,
+                "maxContains": 4,
+            },
+        )
+        self.assertEqual(
+            message,
+            "Too few items match the given schema (expected at least 2 but "
+            "only 1 matched)",
+        )
+
+    def test_contains_too_many(self):
+        message = self.message_for(
+            instance=["foo", "bar", "baz"],
+            schema={"contains": {"type": "string"}, "maxContains": 2},
+        )
+        self.assertEqual(
+            message,
+            "Too many items match the given schema (expected at most 2)",
+        )
+
+    def test_contains_too_many_both_constrained(self):
+        message = self.message_for(
+            instance=["foo"] * 5,
+            schema={
+                "contains": {"type": "string"},
+                "minContains": 2,
+                "maxContains": 4,
+            },
+        )
+        self.assertEqual(
+            message,
+            "Too many items match the given schema (expected at most 4)",
+        )
+
+    def test_exclusiveMinimum(self):
+        message = self.message_for(
+            instance=3,
+            schema={"exclusiveMinimum": 5},
+        )
+        self.assertEqual(
+            message,
+            "3 is less than or equal to the minimum of 5",
+        )
+
+    def test_exclusiveMaximum(self):
+        message = self.message_for(instance=3, schema={"exclusiveMaximum": 2})
+        self.assertEqual(
+            message,
+            "3 is greater than or equal to the maximum of 2",
+        )
+
+    def test_required(self):
+        message = self.message_for(instance={}, schema={"required": ["foo"]})
+        self.assertEqual(message, "'foo' is a required property")
+
+    def test_dependentRequired(self):
+        message = self.message_for(
+            instance={"foo": {}},
+            schema={"dependentRequired": {"foo": ["bar"]}},
+        )
+        self.assertEqual(message, "'bar' is a dependency of 'foo'")
+
+    def test_oneOf_matches_none(self):
+        message = self.message_for(instance={}, schema={"oneOf": [False]})
+        self.assertEqual(
+            message,
+            "{} is not valid under any of the given schemas",
+        )
+
+    def test_oneOf_matches_too_many(self):
+        message = self.message_for(instance={}, schema={"oneOf": [True, True]})
+        self.assertEqual(message, "{} is valid under each of True, True")
+
+    def test_unevaluated_items(self):
+        schema = {"type": "array", "unevaluatedItems": False}
+        message = self.message_for(instance=["foo", "bar"], schema=schema)
+        self.assertIn(
+            message,
+            "Unevaluated items are not allowed ('foo', 'bar' were unexpected)",
+        )
+
+    def test_unevaluated_items_on_invalid_type(self):
+        schema = {"type": "array", "unevaluatedItems": False}
+        message = self.message_for(instance="foo", schema=schema)
+        self.assertEqual(message, "'foo' is not of type 'array'")
+
+    def test_unevaluated_properties_invalid_against_subschema(self):
+        schema = {
+            "properties": {"foo": {"type": "string"}},
+            "unevaluatedProperties": {"const": 12},
+        }
+        message = self.message_for(
+            instance={
+                "foo": "foo",
+                "bar": "bar",
+                "baz": 12,
+            },
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Unevaluated properties are not valid under the given schema "
+            "('bar' was unevaluated and invalid)",
+        )
+
+    def test_unevaluated_properties_disallowed(self):
+        schema = {"type": "object", "unevaluatedProperties": False}
+        message = self.message_for(
+            instance={
+                "foo": "foo",
+                "bar": "bar",
+            },
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Unevaluated properties are not allowed "
+            "('bar', 'foo' were unexpected)",
+        )
+
+    def test_unevaluated_properties_on_invalid_type(self):
+        schema = {"type": "object", "unevaluatedProperties": False}
+        message = self.message_for(instance="foo", schema=schema)
+        self.assertEqual(message, "'foo' is not of type 'object'")
+
+    def test_single_item(self):
+        schema = {"prefixItems": [{}], "items": False}
+        message = self.message_for(
+            instance=["foo", "bar", "baz"],
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Expected at most 1 item but found 2 extra: ['bar', 'baz']",
+        )
+
+    def test_heterogeneous_additionalItems_with_Items(self):
+        schema = {"items": [{}], "additionalItems": False}
+        message = self.message_for(
+            instance=["foo", "bar", 37],
+            schema=schema,
+            cls=validators.Draft7Validator,
+        )
+        self.assertEqual(
+            message,
+            "Additional items are not allowed ('bar', 37 were unexpected)",
+        )
+
+    def test_heterogeneous_items_prefixItems(self):
+        schema = {"prefixItems": [{}], "items": False}
+        message = self.message_for(
+            instance=["foo", "bar", 37],
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Expected at most 1 item but found 2 extra: ['bar', 37]",
+        )
+
+    def test_heterogeneous_unevaluatedItems_prefixItems(self):
+        schema = {"prefixItems": [{}], "unevaluatedItems": False}
+        message = self.message_for(
+            instance=["foo", "bar", 37],
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Unevaluated items are not allowed ('bar', 37 were unexpected)",
+        )
+
+    def test_heterogeneous_properties_additionalProperties(self):
+        """
+        Not valid deserialized JSON, but this should not blow up.
+        """
+        schema = {"properties": {"foo": {}}, "additionalProperties": False}
+        message = self.message_for(
+            instance={"foo": {}, "a": "baz", 37: 12},
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Additional properties are not allowed (37, 'a' were unexpected)",
+        )
+
+    def test_heterogeneous_properties_unevaluatedProperties(self):
+        """
+        Not valid deserialized JSON, but this should not blow up.
+        """
+        schema = {"properties": {"foo": {}}, "unevaluatedProperties": False}
+        message = self.message_for(
+            instance={"foo": {}, "a": "baz", 37: 12},
+            schema=schema,
+        )
+        self.assertEqual(
+            message,
+            "Unevaluated properties are not allowed (37, 'a' were unexpected)",
+        )
+
+
+class TestValidationErrorDetails(TestCase):
+    # TODO: These really need unit tests for each individual keyword, rather
+    #       than just these higher level tests.
+    def test_anyOf(self):
+        instance = 5
+        schema = {
+            "anyOf": [
+                {"minimum": 20},
+                {"type": "string"},
+            ],
+        }
+
+        validator = validators.Draft4Validator(schema)
+        errors = list(validator.iter_errors(instance))
+        self.assertEqual(len(errors), 1)
+        e = errors[0]
+
+        self.assertEqual(e.validator, "anyOf")
+        self.assertEqual(e.validator_value, schema["anyOf"])
+        self.assertEqual(e.instance, instance)
+        self.assertEqual(e.schema, schema)
+        self.assertIsNone(e.parent)
+
+        self.assertEqual(e.path, deque([]))
+        self.assertEqual(e.relative_path, deque([]))
+        self.assertEqual(e.absolute_path, deque([]))
+        self.assertEqual(e.json_path, "$")
+
+        self.assertEqual(e.schema_path, deque(["anyOf"]))
+        self.assertEqual(e.relative_schema_path, deque(["anyOf"]))
+        self.assertEqual(e.absolute_schema_path, deque(["anyOf"]))
+
+        self.assertEqual(len(e.context), 2)
+
+        e1, e2 = sorted_errors(e.context)
+
+        self.assertEqual(e1.validator, "minimum")
+        self.assertEqual(e1.validator_value, schema["anyOf"][0]["minimum"])
+        self.assertEqual(e1.instance, instance)
+        self.assertEqual(e1.schema, schema["anyOf"][0])
+        self.assertIs(e1.parent, e)
+
+        self.assertEqual(e1.path, deque([]))
+        self.assertEqual(e1.absolute_path, deque([]))
+        self.assertEqual(e1.relative_path, deque([]))
+        self.assertEqual(e1.json_path, "$")
+
+        self.assertEqual(e1.schema_path, deque([0, "minimum"]))
+        self.assertEqual(e1.relative_schema_path, deque([0, "minimum"]))
+        self.assertEqual(
+            e1.absolute_schema_path, deque(["anyOf", 0, "minimum"]),
+        )
+
+        self.assertFalse(e1.context)
+
+        self.assertEqual(e2.validator, "type")
+        self.assertEqual(e2.validator_value, schema["anyOf"][1]["type"])
+        self.assertEqual(e2.instance, instance)
+        self.assertEqual(e2.schema, schema["anyOf"][1])
+        self.assertIs(e2.parent, e)
+
+        self.assertEqual(e2.path, deque([]))
+        self.assertEqual(e2.relative_path, deque([]))
+        self.assertEqual(e2.absolute_path, deque([]))
+        self.assertEqual(e2.json_path, "$")
+
+        self.assertEqual(e2.schema_path, deque([1, "type"]))
+        self.assertEqual(e2.relative_schema_path, deque([1, "type"]))
+        self.assertEqual(e2.absolute_schema_path, deque(["anyOf", 1, "type"]))
+
+        self.assertEqual(len(e2.context), 0)
+
+    def test_type(self):
+        instance = {"foo": 1}
+        schema = {
+            "type": [
+                {"type": "integer"},
+                {
+                    "type": "object",
+                    "properties": {"foo": {"enum": [2]}},
+                },
+            ],
+        }
+
+        validator = validators.Draft3Validator(schema)
+        errors = list(validator.iter_errors(instance))
+        self.assertEqual(len(errors), 1)
+        e = errors[0]
+
+        self.assertEqual(e.validator, "type")
+        self.assertEqual(e.validator_value, schema["type"])
+        self.assertEqual(e.instance, instance)
+        self.assertEqual(e.schema, schema)
+        self.assertIsNone(e.parent)
+
+        self.assertEqual(e.path, deque([]))
+        self.assertEqual(e.relative_path, deque([]))
+        self.assertEqual(e.absolute_path, deque([]))
+        self.assertEqual(e.json_path, "$")
+
+        self.assertEqual(e.schema_path, deque(["type"]))
+        self.assertEqual(e.relative_schema_path, deque(["type"]))
+        self.assertEqual(e.absolute_schema_path, deque(["type"]))
+
+        self.assertEqual(len(e.context), 2)
+
+        e1, e2 = sorted_errors(e.context)
+
+        self.assertEqual(e1.validator, "type")
+        self.assertEqual(e1.validator_value, schema["type"][0]["type"])
+        self.assertEqual(e1.instance, instance)
+        self.assertEqual(e1.schema, schema["type"][0])
+        self.assertIs(e1.parent, e)
+
+        self.assertEqual(e1.path, deque([]))
+        self.assertEqual(e1.relative_path, deque([]))
+        self.assertEqual(e1.absolute_path, deque([]))
+        self.assertEqual(e1.json_path, "$")
+
+        self.assertEqual(e1.schema_path, deque([0, "type"]))
+        self.assertEqual(e1.relative_schema_path, deque([0, "type"]))
+        self.assertEqual(e1.absolute_schema_path, deque(["type", 0, "type"]))
+
+        self.assertFalse(e1.context)
+
+        self.assertEqual(e2.validator, "enum")
+        self.assertEqual(e2.validator_value, [2])
+        self.assertEqual(e2.instance, 1)
+        self.assertEqual(e2.schema, {"enum": [2]})
+        self.assertIs(e2.parent, e)
+
+        self.assertEqual(e2.path, deque(["foo"]))
+        self.assertEqual(e2.relative_path, deque(["foo"]))
+        self.assertEqual(e2.absolute_path, deque(["foo"]))
+        self.assertEqual(e2.json_path, "$.foo")
+
+        self.assertEqual(
+            e2.schema_path, deque([1, "properties", "foo", "enum"]),
+        )
+        self.assertEqual(
+            e2.relative_schema_path, deque([1, "properties", "foo", "enum"]),
+        )
+        self.assertEqual(
+            e2.absolute_schema_path,
+            deque(["type", 1, "properties", "foo", "enum"]),
+        )
+
+        self.assertFalse(e2.context)
+
+    def test_single_nesting(self):
+        instance = {"foo": 2, "bar": [1], "baz": 15, "quux": "spam"}
+        schema = {
+            "properties": {
+                "foo": {"type": "string"},
+                "bar": {"minItems": 2},
+                "baz": {"maximum": 10, "enum": [2, 4, 6, 8]},
+            },
+        }
+
+        validator = validators.Draft3Validator(schema)
+        errors = validator.iter_errors(instance)
+        e1, e2, e3, e4 = sorted_errors(errors)
+
+        self.assertEqual(e1.path, deque(["bar"]))
+        self.assertEqual(e2.path, deque(["baz"]))
+        self.assertEqual(e3.path, deque(["baz"]))
+        self.assertEqual(e4.path, deque(["foo"]))
+
+        self.assertEqual(e1.relative_path, deque(["bar"]))
+        self.assertEqual(e2.relative_path, deque(["baz"]))
+        self.assertEqual(e3.relative_path, deque(["baz"]))
+        self.assertEqual(e4.relative_path, deque(["foo"]))
+
+        self.assertEqual(e1.absolute_path, deque(["bar"]))
+        self.assertEqual(e2.absolute_path, deque(["baz"]))
+        self.assertEqual(e3.absolute_path, deque(["baz"]))
+        self.assertEqual(e4.absolute_path, deque(["foo"]))
+
+        self.assertEqual(e1.json_path, "$.bar")
+        self.assertEqual(e2.json_path, "$.baz")
+        self.assertEqual(e3.json_path, "$.baz")
+        self.assertEqual(e4.json_path, "$.foo")
+
+        self.assertEqual(e1.validator, "minItems")
+        self.assertEqual(e2.validator, "enum")
+        self.assertEqual(e3.validator, "maximum")
+        self.assertEqual(e4.validator, "type")
+
+    def test_multiple_nesting(self):
+        instance = [1, {"foo": 2, "bar": {"baz": [1]}}, "quux"]
+        schema = {
+            "type": "string",
+            "items": {
+                "type": ["string", "object"],
+                "properties": {
+                    "foo": {"enum": [1, 3]},
+                    "bar": {
+                        "type": "array",
+                        "properties": {
+                            "bar": {"required": True},
+                            "baz": {"minItems": 2},
+                        },
+                    },
+                },
+            },
+        }
+
+        validator = validators.Draft3Validator(schema)
+        errors = validator.iter_errors(instance)
+        e1, e2, e3, e4, e5, e6 = sorted_errors(errors)
+
+        self.assertEqual(e1.path, deque([]))
+        self.assertEqual(e2.path, deque([0]))
+        self.assertEqual(e3.path, deque([1, "bar"]))
+        self.assertEqual(e4.path, deque([1, "bar", "bar"]))
+        self.assertEqual(e5.path, deque([1, "bar", "baz"]))
+        self.assertEqual(e6.path, deque([1, "foo"]))
+
+        self.assertEqual(e1.json_path, "$")
+        self.assertEqual(e2.json_path, "$[0]")
+        self.assertEqual(e3.json_path, "$[1].bar")
+        self.assertEqual(e4.json_path, "$[1].bar.bar")
+        self.assertEqual(e5.json_path, "$[1].bar.baz")
+        self.assertEqual(e6.json_path, "$[1].foo")
+
+        self.assertEqual(e1.schema_path, deque(["type"]))
+        self.assertEqual(e2.schema_path, deque(["items", "type"]))
+        self.assertEqual(
+            list(e3.schema_path), ["items", "properties", "bar", "type"],
+        )
+        self.assertEqual(
+            list(e4.schema_path),
+            ["items", "properties", "bar", "properties", "bar", "required"],
+        )
+        self.assertEqual(
+            list(e5.schema_path),
+            ["items", "properties", "bar", "properties", "baz", "minItems"],
+        )
+        self.assertEqual(
+            list(e6.schema_path), ["items", "properties", "foo", "enum"],
+        )
+
+        self.assertEqual(e1.validator, "type")
+        self.assertEqual(e2.validator, "type")
+        self.assertEqual(e3.validator, "type")
+        self.assertEqual(e4.validator, "required")
+        self.assertEqual(e5.validator, "minItems")
+        self.assertEqual(e6.validator, "enum")
+
+    def test_recursive(self):
+        schema = {
+            "definitions": {
+                "node": {
+                    "anyOf": [{
+                        "type": "object",
+                        "required": ["name", "children"],
+                        "properties": {
+                            "name": {
+                                "type": "string",
+                            },
+                            "children": {
+                                "type": "object",
+                                "patternProperties": {
+                                    "^.*$": {
+                                        "$ref": "#/definitions/node",
+                                    },
+                                },
+                            },
+                        },
+                    }],
+                },
+            },
+            "type": "object",
+            "required": ["root"],
+            "properties": {"root": {"$ref": "#/definitions/node"}},
+        }
+
+        instance = {
+            "root": {
+                "name": "root",
+                "children": {
+                    "a": {
+                        "name": "a",
+                        "children": {
+                            "ab": {
+                                "name": "ab",
+                                # missing "children"
+                            },
+                        },
+                    },
+                },
+            },
+        }
+        validator = validators.Draft4Validator(schema)
+
+        e, = validator.iter_errors(instance)
+        self.assertEqual(e.absolute_path, deque(["root"]))
+        self.assertEqual(
+            e.absolute_schema_path, deque(["properties", "root", "anyOf"]),
+        )
+        self.assertEqual(e.json_path, "$.root")
+
+        e1, = e.context
+        self.assertEqual(e1.absolute_path, deque(["root", "children", "a"]))
+        self.assertEqual(
+            e1.absolute_schema_path, deque(
+                [
+                    "properties",
+                    "root",
+                    "anyOf",
+                    0,
+                    "properties",
+                    "children",
+                    "patternProperties",
+                    "^.*$",
+                    "anyOf",
+                ],
+            ),
+        )
+        self.assertEqual(e1.json_path, "$.root.children.a")
+
+        e2, = e1.context
+        self.assertEqual(
+            e2.absolute_path, deque(
+                ["root", "children", "a", "children", "ab"],
+            ),
+        )
+        self.assertEqual(
+            e2.absolute_schema_path, deque(
+                [
+                    "properties",
+                    "root",
+                    "anyOf",
+                    0,
+                    "properties",
+                    "children",
+                    "patternProperties",
+                    "^.*$",
+                    "anyOf",
+                    0,
+                    "properties",
+                    "children",
+                    "patternProperties",
+                    "^.*$",
+                    "anyOf",
+                ],
+            ),
+        )
+        self.assertEqual(e2.json_path, "$.root.children.a.children.ab")
+
+    def test_additionalProperties(self):
+        instance = {"bar": "bar", "foo": 2}
+        schema = {"additionalProperties": {"type": "integer", "minimum": 5}}
+
+        validator = validators.Draft3Validator(schema)
+        errors = validator.iter_errors(instance)
+        e1, e2 = sorted_errors(errors)
+
+        self.assertEqual(e1.path, deque(["bar"]))
+        self.assertEqual(e2.path, deque(["foo"]))
+
+        self.assertEqual(e1.json_path, "$.bar")
+        self.assertEqual(e2.json_path, "$.foo")
+
+        self.assertEqual(e1.validator, "type")
+        self.assertEqual(e2.validator, "minimum")
+
+    def test_patternProperties(self):
+        instance = {"bar": 1, "foo": 2}
+        schema = {
+            "patternProperties": {
+                "bar": {"type": "string"},
+                "foo": {"minimum": 5},
+            },
+        }
+
+        validator = validators.Draft3Validator(schema)
+        errors = validator.iter_errors(instance)
+        e1, e2 = sorted_errors(errors)
+
+        self.assertEqual(e1.path, deque(["bar"]))
+        self.assertEqual(e2.path, deque(["foo"]))
+
+        self.assertEqual(e1.json_path, "$.bar")
+        self.assertEqual(e2.json_path, "$.foo")
+
+        self.assertEqual(e1.validator, "type")
+        self.assertEqual(e2.validator, "minimum")
+
+    def test_additionalItems(self):
+        instance = ["foo", 1]
+        schema = {
+            "items": [],
+            "additionalItems": {"type": "integer", "minimum": 5},
+        }
+
+        validator = validators.Draft3Validator(schema)
+        errors = validator.iter_errors(instance)
+        e1, e2 = sorted_errors(errors)
+
+        self.assertEqual(e1.path, deque([0]))
+        self.assertEqual(e2.path, deque([1]))
+
+        self.assertEqual(e1.json_path, "$[0]")
+        self.assertEqual(e2.json_path, "$[1]")
+
+        self.assertEqual(e1.validator, "type")
+        self.assertEqual(e2.validator, "minimum")
+
+    def test_additionalItems_with_items(self):
+        instance = ["foo", "bar", 1]
+        schema = {
+            "items": [{}],
+            "additionalItems": {"type": "integer", "minimum": 5},
+        }
+
+        validator = validators.Draft3Validator(schema)
+        errors = validator.iter_errors(instance)
+        e1, e2 = sorted_errors(errors)
+
+        self.assertEqual(e1.path, deque([1]))
+        self.assertEqual(e2.path, deque([2]))
+
+        self.assertEqual(e1.json_path, "$[1]")
+        self.assertEqual(e2.json_path, "$[2]")
+
+        self.assertEqual(e1.validator, "type")
+        self.assertEqual(e2.validator, "minimum")
+
+    def test_propertyNames(self):
+        instance = {"foo": 12}
+        schema = {"propertyNames": {"not": {"const": "foo"}}}
+
+        validator = validators.Draft7Validator(schema)
+        error, = validator.iter_errors(instance)
+
+        self.assertEqual(error.validator, "not")
+        self.assertEqual(
+            error.message,
+            "'foo' should not be valid under {'const': 'foo'}",
+        )
+        self.assertEqual(error.path, deque([]))
+        self.assertEqual(error.json_path, "$")
+        self.assertEqual(error.schema_path, deque(["propertyNames", "not"]))
+
+    def test_if_then(self):
+        schema = {
+            "if": {"const": 12},
+            "then": {"const": 13},
+        }
+
+        validator = validators.Draft7Validator(schema)
+        error, = validator.iter_errors(12)
+
+        self.assertEqual(error.validator, "const")
+        self.assertEqual(error.message, "13 was expected")
+        self.assertEqual(error.path, deque([]))
+        self.assertEqual(error.json_path, "$")
+        self.assertEqual(error.schema_path, deque(["then", "const"]))
+
+    def test_if_else(self):
+        schema = {
+            "if": {"const": 12},
+            "else": {"const": 13},
+        }
+
+        validator = validators.Draft7Validator(schema)
+        error, = validator.iter_errors(15)
+
+        self.assertEqual(error.validator, "const")
+        self.assertEqual(error.message, "13 was expected")
+        self.assertEqual(error.path, deque([]))
+        self.assertEqual(error.json_path, "$")
+        self.assertEqual(error.schema_path, deque(["else", "const"]))
+
+    def test_boolean_schema_False(self):
+        validator = validators.Draft7Validator(False)
+        error, = validator.iter_errors(12)
+
+        self.assertEqual(
+            (
+                error.message,
+                error.validator,
+                error.validator_value,
+                error.instance,
+                error.schema,
+                error.schema_path,
+                error.json_path,
+            ),
+            (
+                "False schema does not allow 12",
+                None,
+                None,
+                12,
+                False,
+                deque([]),
+                "$",
+            ),
+        )
+
+    def test_ref(self):
+        ref, schema = "someRef", {"additionalProperties": {"type": "integer"}}
+        validator = validators.Draft7Validator(
+            {"$ref": ref},
+            resolver=validators._RefResolver("", {}, store={ref: schema}),
+        )
+        error, = validator.iter_errors({"foo": "notAnInteger"})
+
+        self.assertEqual(
+            (
+                error.message,
+                error.validator,
+                error.validator_value,
+                error.instance,
+                error.absolute_path,
+                error.schema,
+                error.schema_path,
+                error.json_path,
+            ),
+            (
+                "'notAnInteger' is not of type 'integer'",
+                "type",
+                "integer",
+                "notAnInteger",
+                deque(["foo"]),
+                {"type": "integer"},
+                deque(["additionalProperties", "type"]),
+                "$.foo",
+            ),
+        )
+
+    def test_prefixItems(self):
+        schema = {"prefixItems": [{"type": "string"}, {}, {}, {"maximum": 3}]}
+        validator = validators.Draft202012Validator(schema)
+        type_error, min_error = validator.iter_errors([1, 2, "foo", 5])
+        self.assertEqual(
+            (
+                type_error.message,
+                type_error.validator,
+                type_error.validator_value,
+                type_error.instance,
+                type_error.absolute_path,
+                type_error.schema,
+                type_error.schema_path,
+                type_error.json_path,
+            ),
+            (
+                "1 is not of type 'string'",
+                "type",
+                "string",
+                1,
+                deque([0]),
+                {"type": "string"},
+                deque(["prefixItems", 0, "type"]),
+                "$[0]",
+            ),
+        )
+        self.assertEqual(
+            (
+                min_error.message,
+                min_error.validator,
+                min_error.validator_value,
+                min_error.instance,
+                min_error.absolute_path,
+                min_error.schema,
+                min_error.schema_path,
+                min_error.json_path,
+            ),
+            (
+                "5 is greater than the maximum of 3",
+                "maximum",
+                3,
+                5,
+                deque([3]),
+                {"maximum": 3},
+                deque(["prefixItems", 3, "maximum"]),
+                "$[3]",
+            ),
+        )
+
+    def test_prefixItems_with_items(self):
+        schema = {
+            "items": {"type": "string"},
+            "prefixItems": [{}],
+        }
+        validator = validators.Draft202012Validator(schema)
+        e1, e2 = validator.iter_errors(["foo", 2, "bar", 4, "baz"])
+        self.assertEqual(
+            (
+                e1.message,
+                e1.validator,
+                e1.validator_value,
+                e1.instance,
+                e1.absolute_path,
+                e1.schema,
+                e1.schema_path,
+                e1.json_path,
+            ),
+            (
+                "2 is not of type 'string'",
+                "type",
+                "string",
+                2,
+                deque([1]),
+                {"type": "string"},
+                deque(["items", "type"]),
+                "$[1]",
+            ),
+        )
+        self.assertEqual(
+            (
+                e2.message,
+                e2.validator,
+                e2.validator_value,
+                e2.instance,
+                e2.absolute_path,
+                e2.schema,
+                e2.schema_path,
+                e2.json_path,
+            ),
+            (
+                "4 is not of type 'string'",
+                "type",
+                "string",
+                4,
+                deque([3]),
+                {"type": "string"},
+                deque(["items", "type"]),
+                "$[3]",
+            ),
+        )
+
+    def test_contains_too_many(self):
+        """
+        `contains` + `maxContains` produces only one error, even if there are
+        many more incorrectly matching elements.
+        """
+        schema = {"contains": {"type": "string"}, "maxContains": 2}
+        validator = validators.Draft202012Validator(schema)
+        error, = validator.iter_errors(["foo", 2, "bar", 4, "baz", "quux"])
+        self.assertEqual(
+            (
+                error.message,
+                error.validator,
+                error.validator_value,
+                error.instance,
+                error.absolute_path,
+                error.schema,
+                error.schema_path,
+                error.json_path,
+            ),
+            (
+                "Too many items match the given schema (expected at most 2)",
+                "maxContains",
+                2,
+                ["foo", 2, "bar", 4, "baz", "quux"],
+                deque([]),
+                {"contains": {"type": "string"}, "maxContains": 2},
+                deque(["contains"]),
+                "$",
+            ),
+        )
+
+    def test_contains_too_few(self):
+        schema = {"contains": {"type": "string"}, "minContains": 2}
+        validator = validators.Draft202012Validator(schema)
+        error, = validator.iter_errors(["foo", 2, 4])
+        self.assertEqual(
+            (
+                error.message,
+                error.validator,
+                error.validator_value,
+                error.instance,
+                error.absolute_path,
+                error.schema,
+                error.schema_path,
+                error.json_path,
+            ),
+            (
+                (
+                    "Too few items match the given schema "
+                    "(expected at least 2 but only 1 matched)"
+                ),
+                "minContains",
+                2,
+                ["foo", 2, 4],
+                deque([]),
+                {"contains": {"type": "string"}, "minContains": 2},
+                deque(["contains"]),
+                "$",
+            ),
+        )
+
+    def test_contains_none(self):
+        schema = {"contains": {"type": "string"}, "minContains": 2}
+        validator = validators.Draft202012Validator(schema)
+        error, = validator.iter_errors([2, 4])
+        self.assertEqual(
+            (
+                error.message,
+                error.validator,
+                error.validator_value,
+                error.instance,
+                error.absolute_path,
+                error.schema,
+                error.schema_path,
+                error.json_path,
+            ),
+            (
+                "[2, 4] does not contain items matching the given schema",
+                "contains",
+                {"type": "string"},
+                [2, 4],
+                deque([]),
+                {"contains": {"type": "string"}, "minContains": 2},
+                deque(["contains"]),
+                "$",
+            ),
+        )
+
+    def test_ref_sibling(self):
+        schema = {
+            "$defs": {"foo": {"required": ["bar"]}},
+            "properties": {
+                "aprop": {
+                    "$ref": "#/$defs/foo",
+                    "required": ["baz"],
+                },
+            },
+        }
+
+        validator = validators.Draft202012Validator(schema)
+        e1, e2 = validator.iter_errors({"aprop": {}})
+        self.assertEqual(
+            (
+                e1.message,
+                e1.validator,
+                e1.validator_value,
+                e1.instance,
+                e1.absolute_path,
+                e1.schema,
+                e1.schema_path,
+                e1.relative_schema_path,
+                e1.json_path,
+            ),
+            (
+                "'bar' is a required property",
+                "required",
+                ["bar"],
+                {},
+                deque(["aprop"]),
+                {"required": ["bar"]},
+                deque(["properties", "aprop", "required"]),
+                deque(["properties", "aprop", "required"]),
+                "$.aprop",
+            ),
+        )
+        self.assertEqual(
+            (
+                e2.message,
+                e2.validator,
+                e2.validator_value,
+                e2.instance,
+                e2.absolute_path,
+                e2.schema,
+                e2.schema_path,
+                e2.relative_schema_path,
+                e2.json_path,
+            ),
+            (
+                "'baz' is a required property",
+                "required",
+                ["baz"],
+                {},
+                deque(["aprop"]),
+                {"$ref": "#/$defs/foo", "required": ["baz"]},
+                deque(["properties", "aprop", "required"]),
+                deque(["properties", "aprop", "required"]),
+                "$.aprop",
+            ),
+        )
+
+
+class MetaSchemaTestsMixin:
+    # TODO: These all belong upstream
+    def test_invalid_properties(self):
+        with self.assertRaises(exceptions.SchemaError):
+            self.Validator.check_schema({"properties": 12})
+
+    def test_minItems_invalid_string(self):
+        with self.assertRaises(exceptions.SchemaError):
+            # needs to be an integer
+            self.Validator.check_schema({"minItems": "1"})
+
+    def test_enum_allows_empty_arrays(self):
+        """
+        Technically, all the spec says is they SHOULD have elements, not MUST.
+
+        (As of Draft 6. Previous drafts do say MUST).
+
+        See #529.
+        """
+        if self.Validator in {
+            validators.Draft3Validator,
+            validators.Draft4Validator,
+        }:
+            with self.assertRaises(exceptions.SchemaError):
+                self.Validator.check_schema({"enum": []})
+        else:
+            self.Validator.check_schema({"enum": []})
+
+    def test_enum_allows_non_unique_items(self):
+        """
+        Technically, all the spec says is they SHOULD be unique, not MUST.
+
+        (As of Draft 6. Previous drafts do say MUST).
+
+        See #529.
+        """
+        if self.Validator in {
+            validators.Draft3Validator,
+            validators.Draft4Validator,
+        }:
+            with self.assertRaises(exceptions.SchemaError):
+                self.Validator.check_schema({"enum": [12, 12]})
+        else:
+            self.Validator.check_schema({"enum": [12, 12]})
+
+    def test_schema_with_invalid_regex(self):
+        with self.assertRaises(exceptions.SchemaError):
+            self.Validator.check_schema({"pattern": "*notaregex"})
+
+    def test_schema_with_invalid_regex_with_disabled_format_validation(self):
+        self.Validator.check_schema(
+            {"pattern": "*notaregex"},
+            format_checker=None,
+        )
+
+
+class ValidatorTestMixin(MetaSchemaTestsMixin):
+    def test_it_implements_the_validator_protocol(self):
+        self.assertIsInstance(self.Validator({}), protocols.Validator)
+
+    def test_valid_instances_are_valid(self):
+        schema, instance = self.valid
+        self.assertTrue(self.Validator(schema).is_valid(instance))
+
+    def test_invalid_instances_are_not_valid(self):
+        schema, instance = self.invalid
+        self.assertFalse(self.Validator(schema).is_valid(instance))
+
+    def test_non_existent_properties_are_ignored(self):
+        self.Validator({object(): object()}).validate(instance=object())
+
+    def test_evolve(self):
+        schema, format_checker = {"type": "integer"}, FormatChecker()
+        original = self.Validator(
+            schema,
+            format_checker=format_checker,
+        )
+        new = original.evolve(
+            schema={"type": "string"},
+            format_checker=self.Validator.FORMAT_CHECKER,
+        )
+
+        expected = self.Validator(
+            {"type": "string"},
+            format_checker=self.Validator.FORMAT_CHECKER,
+            _resolver=new._resolver,
+        )
+
+        self.assertEqual(new, expected)
+        self.assertNotEqual(new, original)
+
+    def test_evolve_with_subclass(self):
+        """
+        Subclassing validators isn't supported public API, but some users have
+        done it, because we don't actually error entirely when it's done :/
+
+        We need to deprecate doing so first to help as many of these users
+        ensure they can move to supported APIs, but this test ensures that in
+        the interim, we haven't broken those users.
+        """
+
+        with self.assertWarns(DeprecationWarning):
+            @define
+            class OhNo(self.Validator):
+                foo = field(factory=lambda: [1, 2, 3])
+                _bar = field(default=37)
+
+        validator = OhNo({}, bar=12)
+        self.assertEqual(validator.foo, [1, 2, 3])
+
+        new = validator.evolve(schema={"type": "integer"})
+        self.assertEqual(new.foo, [1, 2, 3])
+        self.assertEqual(new._bar, 12)
+
+    def test_is_type_is_true_for_valid_type(self):
+        self.assertTrue(self.Validator({}).is_type("foo", "string"))
+
+    def test_is_type_is_false_for_invalid_type(self):
+        self.assertFalse(self.Validator({}).is_type("foo", "array"))
+
+    def test_is_type_evades_bool_inheriting_from_int(self):
+        self.assertFalse(self.Validator({}).is_type(True, "integer"))
+        self.assertFalse(self.Validator({}).is_type(True, "number"))
+
+    def test_it_can_validate_with_decimals(self):
+        schema = {"items": {"type": "number"}}
+        Validator = validators.extend(
+            self.Validator,
+            type_checker=self.Validator.TYPE_CHECKER.redefine(
+                "number",
+                lambda checker, thing: isinstance(
+                    thing, (int, float, Decimal),
+                ) and not isinstance(thing, bool),
+            ),
+        )
+
+        validator = Validator(schema)
+        validator.validate([1, 1.1, Decimal(1) / Decimal(8)])
+
+        invalid = ["foo", {}, [], True, None]
+        self.assertEqual(
+            [error.instance for error in validator.iter_errors(invalid)],
+            invalid,
+        )
+
+    def test_it_returns_true_for_formats_it_does_not_know_about(self):
+        validator = self.Validator(
+            {"format": "carrot"}, format_checker=FormatChecker(),
+        )
+        validator.validate("bugs")
+
+    def test_it_does_not_validate_formats_by_default(self):
+        validator = self.Validator({})
+        self.assertIsNone(validator.format_checker)
+
+    def test_it_validates_formats_if_a_checker_is_provided(self):
+        checker = FormatChecker()
+        bad = ValueError("Bad!")
+
+        @checker.checks("foo", raises=ValueError)
+        def check(value):
+            if value == "good":
+                return True
+            elif value == "bad":
+                raise bad
+            else:  # pragma: no cover
+                self.fail(f"What is {value}? [Baby Don't Hurt Me]")
+
+        validator = self.Validator(
+            {"format": "foo"}, format_checker=checker,
+        )
+
+        validator.validate("good")
+        with self.assertRaises(exceptions.ValidationError) as cm:
+            validator.validate("bad")
+
+        # Make sure original cause is attached
+        self.assertIs(cm.exception.cause, bad)
+
+    def test_non_string_custom_type(self):
+        non_string_type = object()
+        schema = {"type": [non_string_type]}
+        Crazy = validators.extend(
+            self.Validator,
+            type_checker=self.Validator.TYPE_CHECKER.redefine(
+                non_string_type,
+                lambda checker, thing: isinstance(thing, int),
+            ),
+        )
+        Crazy(schema).validate(15)
+
+    def test_it_properly_formats_tuples_in_errors(self):
+        """
+        A tuple instance properly formats validation errors for uniqueItems.
+
+        See #224
+        """
+        TupleValidator = validators.extend(
+            self.Validator,
+            type_checker=self.Validator.TYPE_CHECKER.redefine(
+                "array",
+                lambda checker, thing: isinstance(thing, tuple),
+            ),
+        )
+        with self.assertRaises(exceptions.ValidationError) as e:
+            TupleValidator({"uniqueItems": True}).validate((1, 1))
+        self.assertIn("(1, 1) has non-unique elements", str(e.exception))
+
+    def test_check_redefined_sequence(self):
+        """
+        Allow array to validate against another defined sequence type
+        """
+        schema = {"type": "array", "uniqueItems": True}
+        MyMapping = namedtuple("MyMapping", "a, b")
+        Validator = validators.extend(
+            self.Validator,
+            type_checker=self.Validator.TYPE_CHECKER.redefine_many(
+                {
+                    "array": lambda checker, thing: isinstance(
+                        thing, (list, deque),
+                    ),
+                    "object": lambda checker, thing: isinstance(
+                        thing, (dict, MyMapping),
+                    ),
+                },
+            ),
+        )
+        validator = Validator(schema)
+
+        valid_instances = [
+            deque(["a", None, "1", "", True]),
+            deque([[False], [0]]),
+            [deque([False]), deque([0])],
+            [[deque([False])], [deque([0])]],
+            [[[[[deque([False])]]]], [[[[deque([0])]]]]],
+            [deque([deque([False])]), deque([deque([0])])],
+            [MyMapping("a", 0), MyMapping("a", False)],
+            [
+                MyMapping("a", [deque([0])]),
+                MyMapping("a", [deque([False])]),
+            ],
+            [
+                MyMapping("a", [MyMapping("a", deque([0]))]),
+                MyMapping("a", [MyMapping("a", deque([False]))]),
+            ],
+            [deque(deque(deque([False]))), deque(deque(deque([0])))],
+        ]
+
+        for instance in valid_instances:
+            validator.validate(instance)
+
+        invalid_instances = [
+            deque(["a", "b", "a"]),
+            deque([[False], [False]]),
+            [deque([False]), deque([False])],
+            [[deque([False])], [deque([False])]],
+            [[[[[deque([False])]]]], [[[[deque([False])]]]]],
+            [deque([deque([False])]), deque([deque([False])])],
+            [MyMapping("a", False), MyMapping("a", False)],
+            [
+                MyMapping("a", [deque([False])]),
+                MyMapping("a", [deque([False])]),
+            ],
+            [
+                MyMapping("a", [MyMapping("a", deque([False]))]),
+                MyMapping("a", [MyMapping("a", deque([False]))]),
+            ],
+            [deque(deque(deque([False]))), deque(deque(deque([False])))],
+        ]
+
+        for instance in invalid_instances:
+            with self.assertRaises(exceptions.ValidationError):
+                validator.validate(instance)
+
+    def test_it_creates_a_ref_resolver_if_not_provided(self):
+        with self.assertWarns(DeprecationWarning):
+            resolver = self.Validator({}).resolver
+        self.assertIsInstance(resolver, validators._RefResolver)
+
+    def test_it_upconverts_from_deprecated_RefResolvers(self):
+        ref, schema = "someCoolRef", {"type": "integer"}
+        resolver = validators._RefResolver("", {}, store={ref: schema})
+        validator = self.Validator({"$ref": ref}, resolver=resolver)
+
+        with self.assertRaises(exceptions.ValidationError):
+            validator.validate(None)
+
+    def test_it_upconverts_from_yet_older_deprecated_legacy_RefResolvers(self):
+        """
+        Legacy RefResolvers support only the context manager form of
+        resolution.
+        """
+
+        class LegacyRefResolver:
+            @contextmanager
+            def resolving(this, ref):
+                self.assertEqual(ref, "the ref")
+                yield {"type": "integer"}
+
+        resolver = LegacyRefResolver()
+        schema = {"$ref": "the ref"}
+
+        with self.assertRaises(exceptions.ValidationError):
+            self.Validator(schema, resolver=resolver).validate(None)
+
+
+class AntiDraft6LeakMixin:
+    """
+    Make sure functionality from draft 6 doesn't leak backwards in time.
+    """
+
+    def test_True_is_not_a_schema(self):
+        with self.assertRaises(exceptions.SchemaError) as e:
+            self.Validator.check_schema(True)
+        self.assertIn("True is not of type", str(e.exception))
+
+    def test_False_is_not_a_schema(self):
+        with self.assertRaises(exceptions.SchemaError) as e:
+            self.Validator.check_schema(False)
+        self.assertIn("False is not of type", str(e.exception))
+
+    def test_True_is_not_a_schema_even_if_you_forget_to_check(self):
+        with self.assertRaises(Exception) as e:
+            self.Validator(True).validate(12)
+        self.assertNotIsInstance(e.exception, exceptions.ValidationError)
+
+    def test_False_is_not_a_schema_even_if_you_forget_to_check(self):
+        with self.assertRaises(Exception) as e:
+            self.Validator(False).validate(12)
+        self.assertNotIsInstance(e.exception, exceptions.ValidationError)
+
+
+class TestDraft3Validator(AntiDraft6LeakMixin, ValidatorTestMixin, TestCase):
+    Validator = validators.Draft3Validator
+    valid: tuple[dict, dict] = ({}, {})
+    invalid = {"type": "integer"}, "foo"
+
+    def test_any_type_is_valid_for_type_any(self):
+        validator = self.Validator({"type": "any"})
+        validator.validate(object())
+
+    def test_any_type_is_redefinable(self):
+        """
+        Sigh, because why not.
+        """
+        Crazy = validators.extend(
+            self.Validator,
+            type_checker=self.Validator.TYPE_CHECKER.redefine(
+                "any", lambda checker, thing: isinstance(thing, int),
+            ),
+        )
+        validator = Crazy({"type": "any"})
+        validator.validate(12)
+        with self.assertRaises(exceptions.ValidationError):
+            validator.validate("foo")
+
+    def test_is_type_is_true_for_any_type(self):
+        self.assertTrue(self.Validator({"type": "any"}).is_valid(object()))
+
+    def test_is_type_does_not_evade_bool_if_it_is_being_tested(self):
+        self.assertTrue(self.Validator({}).is_type(True, "boolean"))
+        self.assertTrue(self.Validator({"type": "any"}).is_valid(True))
+
+
+class TestDraft4Validator(AntiDraft6LeakMixin, ValidatorTestMixin, TestCase):
+    Validator = validators.Draft4Validator
+    valid: tuple[dict, dict] = ({}, {})
+    invalid = {"type": "integer"}, "foo"
+
+
+class TestDraft6Validator(ValidatorTestMixin, TestCase):
+    Validator = validators.Draft6Validator
+    valid: tuple[dict, dict] = ({}, {})
+    invalid = {"type": "integer"}, "foo"
+
+
+class TestDraft7Validator(ValidatorTestMixin, TestCase):
+    Validator = validators.Draft7Validator
+    valid: tuple[dict, dict] = ({}, {})
+    invalid = {"type": "integer"}, "foo"
+
+
+class TestDraft201909Validator(ValidatorTestMixin, TestCase):
+    Validator = validators.Draft201909Validator
+    valid: tuple[dict, dict] = ({}, {})
+    invalid = {"type": "integer"}, "foo"
+
+
+class TestDraft202012Validator(ValidatorTestMixin, TestCase):
+    Validator = validators.Draft202012Validator
+    valid: tuple[dict, dict] = ({}, {})
+    invalid = {"type": "integer"}, "foo"
+
+
+class TestLatestValidator(TestCase):
+    """
+    These really apply to multiple versions but are easiest to test on one.
+    """
+
+    def test_ref_resolvers_may_have_boolean_schemas_stored(self):
+        ref = "someCoolRef"
+        schema = {"$ref": ref}
+        resolver = validators._RefResolver("", {}, store={ref: False})
+        validator = validators._LATEST_VERSION(schema, resolver=resolver)
+
+        with self.assertRaises(exceptions.ValidationError):
+            validator.validate(None)
+
+
+class TestValidatorFor(TestCase):
+    def test_draft_3(self):
+        schema = {"$schema": "http://json-schema.org/draft-03/schema"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft3Validator,
+        )
+
+        schema = {"$schema": "http://json-schema.org/draft-03/schema#"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft3Validator,
+        )
+
+    def test_draft_4(self):
+        schema = {"$schema": "http://json-schema.org/draft-04/schema"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft4Validator,
+        )
+
+        schema = {"$schema": "http://json-schema.org/draft-04/schema#"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft4Validator,
+        )
+
+    def test_draft_6(self):
+        schema = {"$schema": "http://json-schema.org/draft-06/schema"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft6Validator,
+        )
+
+        schema = {"$schema": "http://json-schema.org/draft-06/schema#"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft6Validator,
+        )
+
+    def test_draft_7(self):
+        schema = {"$schema": "http://json-schema.org/draft-07/schema"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft7Validator,
+        )
+
+        schema = {"$schema": "http://json-schema.org/draft-07/schema#"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft7Validator,
+        )
+
+    def test_draft_201909(self):
+        schema = {"$schema": "https://json-schema.org/draft/2019-09/schema"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft201909Validator,
+        )
+
+        schema = {"$schema": "https://json-schema.org/draft/2019-09/schema#"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft201909Validator,
+        )
+
+    def test_draft_202012(self):
+        schema = {"$schema": "https://json-schema.org/draft/2020-12/schema"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft202012Validator,
+        )
+
+        schema = {"$schema": "https://json-schema.org/draft/2020-12/schema#"}
+        self.assertIs(
+            validators.validator_for(schema),
+            validators.Draft202012Validator,
+        )
+
+    def test_True(self):
+        self.assertIs(
+            validators.validator_for(True),
+            validators._LATEST_VERSION,
+        )
+
+    def test_False(self):
+        self.assertIs(
+            validators.validator_for(False),
+            validators._LATEST_VERSION,
+        )
+
+    def test_custom_validator(self):
+        Validator = validators.create(
+            meta_schema={"id": "meta schema id"},
+            version="12",
+            id_of=lambda s: s.get("id", ""),
+        )
+        schema = {"$schema": "meta schema id"}
+        self.assertIs(
+            validators.validator_for(schema),
+            Validator,
+        )
+
+    def test_custom_validator_draft6(self):
+        Validator = validators.create(
+            meta_schema={"$id": "meta schema $id"},
+            version="13",
+        )
+        schema = {"$schema": "meta schema $id"}
+        self.assertIs(
+            validators.validator_for(schema),
+            Validator,
+        )
+
+    def test_validator_for_jsonschema_default(self):
+        self.assertIs(validators.validator_for({}), validators._LATEST_VERSION)
+
+    def test_validator_for_custom_default(self):
+        self.assertIs(validators.validator_for({}, default=None), None)
+
+    def test_warns_if_meta_schema_specified_was_not_found(self):
+        with self.assertWarns(DeprecationWarning) as cm:
+            validators.validator_for(schema={"$schema": "unknownSchema"})
+
+        self.assertEqual(cm.filename, __file__)
+        self.assertEqual(
+            str(cm.warning),
+            "The metaschema specified by $schema was not found. "
+            "Using the latest draft to validate, but this will raise "
+            "an error in the future.",
+        )
+
+    def test_does_not_warn_if_meta_schema_is_unspecified(self):
+        with warnings.catch_warnings(record=True) as w:
+            warnings.simplefilter("always")
+            validators.validator_for(schema={}, default={})
+        self.assertFalse(w)
+
+    def test_validator_for_custom_default_with_schema(self):
+        schema, default = {"$schema": "mailto:foo@example.com"}, object()
+        self.assertIs(validators.validator_for(schema, default), default)
+
+
+class TestValidate(TestCase):
+    def assertUses(self, schema, Validator):
+        result = []
+        with mock.patch.object(Validator, "check_schema", result.append):
+            validators.validate({}, schema)
+        self.assertEqual(result, [schema])
+
+    def test_draft3_validator_is_chosen(self):
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-03/schema#"},
+            Validator=validators.Draft3Validator,
+        )
+        # Make sure it works without the empty fragment
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-03/schema"},
+            Validator=validators.Draft3Validator,
+        )
+
+    def test_draft4_validator_is_chosen(self):
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-04/schema#"},
+            Validator=validators.Draft4Validator,
+        )
+        # Make sure it works without the empty fragment
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-04/schema"},
+            Validator=validators.Draft4Validator,
+        )
+
+    def test_draft6_validator_is_chosen(self):
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-06/schema#"},
+            Validator=validators.Draft6Validator,
+        )
+        # Make sure it works without the empty fragment
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-06/schema"},
+            Validator=validators.Draft6Validator,
+        )
+
+    def test_draft7_validator_is_chosen(self):
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-07/schema#"},
+            Validator=validators.Draft7Validator,
+        )
+        # Make sure it works without the empty fragment
+        self.assertUses(
+            schema={"$schema": "http://json-schema.org/draft-07/schema"},
+            Validator=validators.Draft7Validator,
+        )
+
+    def test_draft202012_validator_is_chosen(self):
+        self.assertUses(
+            schema={
+                "$schema": "https://json-schema.org/draft/2020-12/schema#",
+            },
+            Validator=validators.Draft202012Validator,
+        )
+        # Make sure it works without the empty fragment
+        self.assertUses(
+            schema={
+                "$schema": "https://json-schema.org/draft/2020-12/schema",
+            },
+            Validator=validators.Draft202012Validator,
+        )
+
+    def test_draft202012_validator_is_the_default(self):
+        self.assertUses(schema={}, Validator=validators.Draft202012Validator)
+
+    def test_validation_error_message(self):
+        with self.assertRaises(exceptions.ValidationError) as e:
+            validators.validate(12, {"type": "string"})
+        self.assertRegex(
+            str(e.exception),
+            "(?s)Failed validating '.*' in schema.*On instance",
+        )
+
+    def test_schema_error_message(self):
+        with self.assertRaises(exceptions.SchemaError) as e:
+            validators.validate(12, {"type": 12})
+        self.assertRegex(
+            str(e.exception),
+            "(?s)Failed validating '.*' in metaschema.*On schema",
+        )
+
+    def test_it_uses_best_match(self):
+        schema = {
+            "oneOf": [
+                {"type": "number", "minimum": 20},
+                {"type": "array"},
+            ],
+        }
+        with self.assertRaises(exceptions.ValidationError) as e:
+            validators.validate(12, schema)
+        self.assertIn("12 is less than the minimum of 20", str(e.exception))
+
+
+class TestThreading(TestCase):
+    """
+    Threading-related functionality tests.
+
+    jsonschema doesn't promise thread safety, and its validation behavior
+    across multiple threads may change at any time, but that means it isn't
+    safe to share *validators* across threads, not that anytime one has
+    multiple threads that jsonschema won't work (it certainly is intended to).
+
+    These tests ensure that this minimal level of functionality continues to
+    work.
+    """
+
+    def test_validation_across_a_second_thread(self):
+        failed = []
+
+        def validate():
+            try:
+                validators.validate(instance=37, schema=True)
+            except:  # pragma: no cover  # noqa: E722
+                failed.append(sys.exc_info())
+
+        validate()  # just verify it succeeds
+
+        from threading import Thread
+        thread = Thread(target=validate)
+        thread.start()
+        thread.join()
+        self.assertEqual((thread.is_alive(), failed), (False, []))
+
+
+class TestReferencing(TestCase):
+    def test_registry_with_retrieve(self):
+        def retrieve(uri):
+            return DRAFT202012.create_resource({"type": "integer"})
+
+        registry = referencing.Registry(retrieve=retrieve)
+        schema = {"$ref": "https://example.com/"}
+        validator = validators.Draft202012Validator(schema, registry=registry)
+
+        self.assertEqual(
+            (validator.is_valid(12), validator.is_valid("foo")),
+            (True, False),
+        )
+
+    def test_custom_registries_do_not_autoretrieve_remote_resources(self):
+        registry = referencing.Registry()
+        schema = {"$ref": "https://example.com/"}
+        validator = validators.Draft202012Validator(schema, registry=registry)
+
+        with warnings.catch_warnings(record=True) as w:
+            warnings.simplefilter("always")
+            with self.assertRaises(referencing.exceptions.Unresolvable):
+                validator.validate(12)
+        self.assertFalse(w)
+
+
+class TestRefResolver(TestCase):
+
+    base_uri = ""
+    stored_uri = "foo://stored"
+    stored_schema = {"stored": "schema"}
+
+    def setUp(self):
+        self.referrer = {}
+        self.store = {self.stored_uri: self.stored_schema}
+        self.resolver = validators._RefResolver(
+            self.base_uri, self.referrer, self.store,
+        )
+
+    def test_it_does_not_retrieve_schema_urls_from_the_network(self):
+        ref = validators.Draft3Validator.META_SCHEMA["id"]
+        with mock.patch.object(self.resolver, "resolve_remote") as patched:  # noqa: SIM117
+            with self.resolver.resolving(ref) as resolved:
+                pass
+        self.assertEqual(resolved, validators.Draft3Validator.META_SCHEMA)
+        self.assertFalse(patched.called)
+
+    def test_it_resolves_local_refs(self):
+        ref = "#/properties/foo"
+        self.referrer["properties"] = {"foo": object()}
+        with self.resolver.resolving(ref) as resolved:
+            self.assertEqual(resolved, self.referrer["properties"]["foo"])
+
+    def test_it_resolves_local_refs_with_id(self):
+        schema = {"id": "http://bar/schema#", "a": {"foo": "bar"}}
+        resolver = validators._RefResolver.from_schema(
+            schema,
+            id_of=lambda schema: schema.get("id", ""),
+        )
+        with resolver.resolving("#/a") as resolved:
+            self.assertEqual(resolved, schema["a"])
+        with resolver.resolving("http://bar/schema#/a") as resolved:
+            self.assertEqual(resolved, schema["a"])
+
+    def test_it_retrieves_stored_refs(self):
+        with self.resolver.resolving(self.stored_uri) as resolved:
+            self.assertIs(resolved, self.stored_schema)
+
+        self.resolver.store["cached_ref"] = {"foo": 12}
+        with self.resolver.resolving("cached_ref#/foo") as resolved:
+            self.assertEqual(resolved, 12)
+
+    def test_it_retrieves_unstored_refs_via_requests(self):
+        ref = "http://bar#baz"
+        schema = {"baz": 12}
+
+        if "requests" in sys.modules:  # pragma: no cover
+            self.addCleanup(
+                sys.modules.__setitem__, "requests", sys.modules["requests"],
+            )
+        sys.modules["requests"] = ReallyFakeRequests({"http://bar": schema})
+
+        with self.resolver.resolving(ref) as resolved:
+            self.assertEqual(resolved, 12)
+
+    def test_it_retrieves_unstored_refs_via_urlopen(self):
+        ref = "http://bar#baz"
+        schema = {"baz": 12}
+
+        if "requests" in sys.modules:  # pragma: no cover
+            self.addCleanup(
+                sys.modules.__setitem__, "requests", sys.modules["requests"],
+            )
+        sys.modules["requests"] = None
+
+        @contextmanager
+        def fake_urlopen(url):
+            self.assertEqual(url, "http://bar")
+            yield BytesIO(json.dumps(schema).encode("utf8"))
+
+        self.addCleanup(setattr, validators, "urlopen", validators.urlopen)
+        validators.urlopen = fake_urlopen
+
+        with self.resolver.resolving(ref) as resolved:
+            pass
+        self.assertEqual(resolved, 12)
+
+    def test_it_retrieves_local_refs_via_urlopen(self):
+        with tempfile.NamedTemporaryFile(delete=False, mode="wt") as tempf:
+            self.addCleanup(os.remove, tempf.name)
+            json.dump({"foo": "bar"}, tempf)
+
+        ref = f"file://{pathname2url(tempf.name)}#foo"
+        with self.resolver.resolving(ref) as resolved:
+            self.assertEqual(resolved, "bar")
+
+    def test_it_can_construct_a_base_uri_from_a_schema(self):
+        schema = {"id": "foo"}
+        resolver = validators._RefResolver.from_schema(
+            schema,
+            id_of=lambda schema: schema.get("id", ""),
+        )
+        self.assertEqual(resolver.base_uri, "foo")
+        self.assertEqual(resolver.resolution_scope, "foo")
+        with resolver.resolving("") as resolved:
+            self.assertEqual(resolved, schema)
+        with resolver.resolving("#") as resolved:
+            self.assertEqual(resolved, schema)
+        with resolver.resolving("foo") as resolved:
+            self.assertEqual(resolved, schema)
+        with resolver.resolving("foo#") as resolved:
+            self.assertEqual(resolved, schema)
+
+    def test_it_can_construct_a_base_uri_from_a_schema_without_id(self):
+        schema = {}
+        resolver = validators._RefResolver.from_schema(schema)
+        self.assertEqual(resolver.base_uri, "")
+        self.assertEqual(resolver.resolution_scope, "")
+        with resolver.resolving("") as resolved:
+            self.assertEqual(resolved, schema)
+        with resolver.resolving("#") as resolved:
+            self.assertEqual(resolved, schema)
+
+    def test_custom_uri_scheme_handlers(self):
+        def handler(url):
+            self.assertEqual(url, ref)
+            return schema
+
+        schema = {"foo": "bar"}
+        ref = "foo://bar"
+        resolver = validators._RefResolver("", {}, handlers={"foo": handler})
+        with resolver.resolving(ref) as resolved:
+            self.assertEqual(resolved, schema)
+
+    def test_cache_remote_on(self):
+        response = [object()]
+
+        def handler(url):
+            try:
+                return response.pop()
+            except IndexError:  # pragma: no cover
+                self.fail("Response must not have been cached!")
+
+        ref = "foo://bar"
+        resolver = validators._RefResolver(
+            "", {}, cache_remote=True, handlers={"foo": handler},
+        )
+        with resolver.resolving(ref):
+            pass
+        with resolver.resolving(ref):
+            pass
+
+    def test_cache_remote_off(self):
+        response = [object()]
+
+        def handler(url):
+            try:
+                return response.pop()
+            except IndexError:  # pragma: no cover
+                self.fail("Handler called twice!")
+
+        ref = "foo://bar"
+        resolver = validators._RefResolver(
+            "", {}, cache_remote=False, handlers={"foo": handler},
+        )
+        with resolver.resolving(ref):
+            pass
+
+    def test_if_you_give_it_junk_you_get_a_resolution_error(self):
+        error = ValueError("Oh no! What's this?")
+
+        def handler(url):
+            raise error
+
+        ref = "foo://bar"
+        resolver = validators._RefResolver("", {}, handlers={"foo": handler})
+        with self.assertRaises(exceptions._RefResolutionError) as err:  # noqa: SIM117
+            with resolver.resolving(ref):
+                self.fail("Shouldn't get this far!")  # pragma: no cover
+        self.assertEqual(err.exception, exceptions._RefResolutionError(error))
+
+    def test_helpful_error_message_on_failed_pop_scope(self):
+        resolver = validators._RefResolver("", {})
+        resolver.pop_scope()
+        with self.assertRaises(exceptions._RefResolutionError) as exc:
+            resolver.pop_scope()
+        self.assertIn("Failed to pop the scope", str(exc.exception))
+
+    def test_pointer_within_schema_with_different_id(self):
+        """
+        See #1085.
+        """
+        schema = validators.Draft7Validator.META_SCHEMA
+        one = validators._RefResolver("", schema)
+        validator = validators.Draft7Validator(schema, resolver=one)
+        self.assertFalse(validator.is_valid({"maxLength": "foo"}))
+
+        another = {
+            "allOf": [{"$ref": validators.Draft7Validator.META_SCHEMA["$id"]}],
+        }
+        two = validators._RefResolver("", another)
+        validator = validators.Draft7Validator(another, resolver=two)
+        self.assertFalse(validator.is_valid({"maxLength": "foo"}))
+
+    def test_newly_created_validator_with_ref_resolver(self):
+        """
+        See https://github.com/python-jsonschema/jsonschema/issues/1061#issuecomment-1624266555.
+        """
+
+        def handle(uri):
+            self.assertEqual(uri, "http://example.com/foo")
+            return {"type": "integer"}
+
+        resolver = validators._RefResolver("", {}, handlers={"http": handle})
+        Validator = validators.create(
+            meta_schema={},
+            validators=validators.Draft4Validator.VALIDATORS,
+        )
+        schema = {"$id": "http://example.com/bar", "$ref": "foo"}
+        validator = Validator(schema, resolver=resolver)
+        self.assertEqual(
+            (validator.is_valid({}), validator.is_valid(37)),
+            (False, True),
+        )
+
+    def test_refresolver_with_pointer_in_schema_with_no_id(self):
+        """
+        See https://github.com/python-jsonschema/jsonschema/issues/1124#issuecomment-1632574249.
+        """
+
+        schema = {
+            "properties": {"x": {"$ref": "#/definitions/x"}},
+            "definitions": {"x": {"type": "integer"}},
+        }
+
+        validator = validators.Draft202012Validator(
+            schema,
+            resolver=validators._RefResolver("", schema),
+        )
+        self.assertEqual(
+            (validator.is_valid({"x": "y"}), validator.is_valid({"x": 37})),
+            (False, True),
+        )
+
+
+
+def sorted_errors(errors):
+    def key(error):
+        return (
+            [str(e) for e in error.path],
+            [str(e) for e in error.schema_path],
+        )
+    return sorted(errors, key=key)
+
+
+@define
+class ReallyFakeRequests:
+
+    _responses: dict[str, Any]
+
+    def get(self, url):
+        response = self._responses.get(url)
+        if url is None:  # pragma: no cover
+            raise ValueError("Unknown URL: " + repr(url))
+        return _ReallyFakeJSONResponse(json.dumps(response))
+
+
+@define
+class _ReallyFakeJSONResponse:
+
+    _response: str
+
+    def json(self):
+        return json.loads(self._response)