diff options
Diffstat (limited to 'Lib/test/test_unittest/testmock/testhelpers.py')
-rw-r--r-- | Lib/test/test_unittest/testmock/testhelpers.py | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/Lib/test/test_unittest/testmock/testhelpers.py b/Lib/test/test_unittest/testmock/testhelpers.py index c9c20f008ca..f260769eb8c 100644 --- a/Lib/test/test_unittest/testmock/testhelpers.py +++ b/Lib/test/test_unittest/testmock/testhelpers.py @@ -8,8 +8,10 @@ from unittest.mock import ( Mock, ANY, _CallList, patch, PropertyMock, _callable ) +from dataclasses import dataclass, field, InitVar from datetime import datetime from functools import partial +from typing import ClassVar class SomeClass(object): def one(self, a, b): pass @@ -1034,6 +1036,76 @@ class SpecSignatureTest(unittest.TestCase): self.assertEqual(mock.mock_calls, []) self.assertEqual(rv.mock_calls, []) + def test_dataclass_post_init(self): + @dataclass + class WithPostInit: + a: int = field(init=False) + b: int = field(init=False) + def __post_init__(self): + self.a = 1 + self.b = 2 + + for mock in [ + create_autospec(WithPostInit, instance=True), + create_autospec(WithPostInit()), + ]: + with self.subTest(mock=mock): + self.assertIsInstance(mock.a, int) + self.assertIsInstance(mock.b, int) + + # Classes do not have these fields: + mock = create_autospec(WithPostInit) + msg = "Mock object has no attribute" + with self.assertRaisesRegex(AttributeError, msg): + mock.a + with self.assertRaisesRegex(AttributeError, msg): + mock.b + + def test_dataclass_default(self): + @dataclass + class WithDefault: + a: int + b: int = 0 + + for mock in [ + create_autospec(WithDefault, instance=True), + create_autospec(WithDefault(1)), + ]: + with self.subTest(mock=mock): + self.assertIsInstance(mock.a, int) + self.assertIsInstance(mock.b, int) + + def test_dataclass_with_method(self): + @dataclass + class WithMethod: + a: int + def b(self) -> int: + return 1 + + for mock in [ + create_autospec(WithMethod, instance=True), + create_autospec(WithMethod(1)), + ]: + with self.subTest(mock=mock): + self.assertIsInstance(mock.a, int) + mock.b.assert_not_called() + + def test_dataclass_with_non_fields(self): + @dataclass + class WithNonFields: + a: ClassVar[int] + b: InitVar[int] + + msg = "Mock object has no attribute" + for mock in [ + create_autospec(WithNonFields, instance=True), + create_autospec(WithNonFields(1)), + ]: + with self.subTest(mock=mock): + with self.assertRaisesRegex(AttributeError, msg): + mock.a + with self.assertRaisesRegex(AttributeError, msg): + mock.b class TestCallList(unittest.TestCase): |