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"""Test cases for functions defined in monads.py"""
import pytest
from pymonad.maybe import Just, Nothing
from gn3.monads import MonadicDict
@pytest.mark.unit_test
@pytest.mark.parametrize(
("key", "value", "expected"),
(
("foo", Just(1), Just(1)),
("bar", Nothing, Nothing),
),
)
def test_monadic_dict(key, value, expected):
"""Test basic Monadic Dict operations"""
_test_dict = MonadicDict()
_test_dict[key] = value
_test_dict |= {"test_update": "random"}
assert _test_dict[key] == expected
assert _test_dict["test_update"] == Just("random")
assert _test_dict["non-existent"] == Nothing
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