Method test_closing_error

Lib/test/test_contextlib.py:419–430

(self)

        self.assertEqual(state, [1])

    def test_closing_error(self):
        state = []
        class C:
            def close(self):
                state.append(1)
        x = C()
        self.assertEqual(state, [])
        with self.assertRaises(ZeroDivisionError):
            with closing(x) as y:
                self.assertEqual(x, y)
                1 / 0
        self.assertEqual(state, [1])


class NullcontextTestCase(unittest.TestCase):