generated from daniil-berg/boilerplate-py
56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
from typing import Generic, TypeVar
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from unittest import TestCase
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from unittest.mock import MagicMock, patch
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from marshmallow_generic import _util
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class GenericInsightMixinTestCase(TestCase):
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@patch.object(_util, "super")
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def test___init_subclass__(self, mock_super: MagicMock) -> None:
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mock_super_meth = MagicMock()
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mock_super.return_value = MagicMock(__init_subclass__=mock_super_meth)
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# Should be `None` by default:
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self.assertIsNone(
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_util.GenericInsightMixin._type_arg # type: ignore[misc]
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)
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# If the mixin type argument was not specified (still generic),
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# ensure that the attribute remains `None` on the subclass:
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t = TypeVar("t")
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class Foo:
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pass
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class Bar(Generic[t]):
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pass
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class TestSchema1(Bar[str], _util.GenericInsightMixin[t]):
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pass
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self.assertIsNone(TestSchema1._type_arg) # type: ignore[misc]
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mock_super.assert_called_once()
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mock_super_meth.assert_called_once_with()
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mock_super.reset_mock()
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mock_super_meth.reset_mock()
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# If the mixin type argument was specified,
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# ensure it was assigned to the attribute on the child class:
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class TestSchema2(Bar[str], _util.GenericInsightMixin[Foo]):
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pass
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self.assertIs(Foo, TestSchema2._type_arg) # type: ignore[misc]
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mock_super.assert_called_once()
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mock_super_meth.assert_called_once_with()
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def test__get_type_arg(self) -> None:
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with self.assertRaises(AttributeError):
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_util.GenericInsightMixin._get_type_arg()
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_type = object()
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with patch.object(_util.GenericInsightMixin, "_type_arg", new=_type):
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self.assertIs(_type, _util.GenericInsightMixin._get_type_arg())
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