Method test_makefile_invalid_mode

Lib/test/test_socket.py:1929–1934

(self)

                        self.assertEqual(fp.mode, mode)

    def test_makefile_invalid_mode(self):
        for mode in 'rt', 'x', '+', 'a':
            with self.subTest(mode=mode):
                with socket.socket() as sock:
                    with self.assertRaisesRegex(ValueError, 'invalid mode'):
                        sock.makefile(mode)

    def test_pickle(self):
        sock = socket.socket()