1 files changed, 51 insertions, 0 deletions
diff --git a/tests/unit/auth/fixtures/migration_fixtures.py b/tests/unit/auth/fixtures/migration_fixtures.py
new file mode 100644
index 0000000..3e511b1
--- /dev/null
+++ b/tests/unit/auth/fixtures/migration_fixtures.py
@@ -0,0 +1,51 @@
+"""Fixtures and utilities for migration-related tests"""
+import pytest
+from yoyo.backends import DatabaseBackend
+from yoyo import get_backend, read_migrations
+from yoyo.migrations import Migration, MigrationList
+
+from gn3.auth import db
+from gn3.migrations import apply_migrations, rollback_migrations
+
+@pytest.fixture(scope="session")
+def auth_testdb_path(test_app_config): # pylint: disable=redefined-outer-name
+    """Get the test application's auth database file"""
+    return test_app_config["AUTH_DB"]
+
+@pytest.fixture(scope="session")
+def auth_migrations_dir(test_app_config): # pylint: disable=redefined-outer-name
+    """Get the test application's auth database file"""
+    return test_app_config["AUTH_MIGRATIONS"]
+
+def apply_single_migration(backend: DatabaseBackend, migration: Migration):# pylint: disable=[redefined-outer-name]
+    """Utility to apply a single migration"""
+    apply_migrations(backend, MigrationList([migration]))
+
+def rollback_single_migration(backend: DatabaseBackend, migration: Migration):# pylint: disable=[redefined-outer-name]
+    """Utility to rollback a single migration"""
+    rollback_migrations(backend, MigrationList([migration]))
+
+@pytest.fixture(scope="session")
+def backend(auth_testdb_path):# pylint: disable=redefined-outer-name
+    """Fixture: retrieve yoyo backend for auth database"""
+    return get_backend(f"sqlite:///{auth_testdb_path}")
+
+@pytest.fixture(scope="session")
+def all_migrations(auth_migrations_dir): # pylint: disable=redefined-outer-name
+    """Retrieve all the migrations"""
+    return read_migrations(auth_migrations_dir)
+
+@pytest.fixture(scope="function")
+def conn_after_auth_migrations(backend, auth_testdb_path, all_migrations): # pylint: disable=redefined-outer-name
+    """Run all migrations and return a connection to the database after"""
+    apply_migrations(backend, all_migrations)
+    with db.connection(auth_testdb_path) as conn:
+        yield conn
+
+    rollback_migrations(backend, all_migrations)
+
+def migrations_up_to(migration, migrations_dir):
+    """Run all the migration before `migration`."""
+    migrations = read_migrations(migrations_dir)
+    index = [mig.path for mig in migrations].index(migration)
+    return MigrationList(migrations[0:index])