Method test_set_update

Lib/test/test_capi/test_set.py:230–252

(self)

class TestInternalCAPI(BaseSetTests, unittest.TestCase):
    def test_set_update(self):
        update = _testinternalcapi.set_update
        for cls in (set, set_subclass):
            for it in ('ab', ('a', 'b'), ['a', 'b'],
                       set('ab'), set_subclass('ab'),
                       frozenset('ab'), frozenset_subclass('ab')):
                with self.subTest(cls=cls, it=it):
                    instance = cls()
                    self.assertEqual(update(instance, it), 0)
                    self.assertEqual(instance, {'a', 'b'})
                    instance = cls(it)
                    self.assertEqual(update(instance, it), 0)
                    self.assertEqual(instance, {'a', 'b'})
            with self.assertRaisesRegex(TypeError, 'object is not iterable'):
                update(cls(), 1)
            with self.assertRaisesRegex(TypeError, "unhashable type: 'dict'"):
                update(cls(), [{}])
        with self.assertRaises(SystemError):
            update(object(), 'ab')
        self.assertImmutable(update, 'ab')
        # CRASHES: update(NULL, object())
        # CRASHES: update(instance, NULL)
        # CRASHES: update(NULL, NULL)

    def test_set_next_entry(self):
        set_next = _testinternalcapi.set_next_entry