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How to use subclasscheck method in freezegun

Best Python code snippet using freezegun

test_typechecks.py

Source:test_typechecks.py

...3from test import test_support4class ABC(type):5    def __instancecheck__(cls, inst):6        """Implement isinstance(inst, cls)."""7        return any(cls.__subclasscheck__(c)8                   for c in set([type(inst), inst.__class__]))9    def __subclasscheck__(cls, sub):10        """Implement issubclass(sub, cls)."""11        candidates = cls.__dict__.get("__subclass__", set()) | set([cls])12        return any(c in candidates for c in sub.mro())13class Integer:14    __metaclass__ = ABC15    __subclass__ = set([int])16class SubInt(Integer):17    pass18class TypeChecksTest(unittest.TestCase):19    def testIsSubclassInternal(self):20        self.assertEqual(Integer.__subclasscheck__(int), True)21        self.assertEqual(Integer.__subclasscheck__(float), False)22    def testIsSubclassBuiltin(self):23        self.assertEqual(issubclass(int, Integer), True)24        self.assertEqual(issubclass(int, (Integer,)), True)25        self.assertEqual(issubclass(float, Integer), False)26        self.assertEqual(issubclass(float, (Integer,)), False)27    def testIsInstanceBuiltin(self):28        self.assertEqual(isinstance(42, Integer), True)29        self.assertEqual(isinstance(42, (Integer,)), True)30        self.assertEqual(isinstance(3.14, Integer), False)31        self.assertEqual(isinstance(3.14, (Integer,)), False)32    def testIsInstanceActual(self):33        self.assertEqual(isinstance(Integer(), Integer), True)34        self.assertEqual(isinstance(Integer(), (Integer,)), True)35    def testIsSubclassActual(self):36        self.assertEqual(issubclass(Integer, Integer), True)37        self.assertEqual(issubclass(Integer, (Integer,)), True)38    def testSubclassBehavior(self):39        self.assertEqual(issubclass(SubInt, Integer), True)40        self.assertEqual(issubclass(SubInt, (Integer,)), True)41        self.assertEqual(issubclass(SubInt, SubInt), True)42        self.assertEqual(issubclass(SubInt, (SubInt,)), True)43        self.assertEqual(issubclass(Integer, SubInt), False)44        self.assertEqual(issubclass(Integer, (SubInt,)), False)45        self.assertEqual(issubclass(int, SubInt), False)46        self.assertEqual(issubclass(int, (SubInt,)), False)47        self.assertEqual(isinstance(SubInt(), Integer), True)48        self.assertEqual(isinstance(SubInt(), (Integer,)), True)49        self.assertEqual(isinstance(SubInt(), SubInt), True)50        self.assertEqual(isinstance(SubInt(), (SubInt,)), True)51        self.assertEqual(isinstance(42, SubInt), False)52        self.assertEqual(isinstance(42, (SubInt,)), False)53    def test_oldstyle(self):54        # These should just be ignored.55        class X:56            def __instancecheck__(self, inst):57                return True58            def __subclasscheck__(self, cls):59                return True60        class Sub(X): pass61        self.assertNotIsInstance(3, X)62        self.assertIsInstance(X(), X)63        self.assertFalse(issubclass(int, X))64        self.assertTrue(issubclass(Sub, X))65def test_main():66    test_support.run_unittest(TypeChecksTest)67if __name__ == "__main__":...

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