Method test_invocation

Lib/test/test_dis.py:2559–2583

(self)

            self.assertListEqual(res.splitlines(), expect.splitlines())

    def test_invocation(self):
        # test various combinations of parameters
        base_flags = [
            ('-C', '--show-caches'),
            ('-O', '--show-offsets'),
            ('-P', '--show-positions'),
            ('-S', '--specialized'),
        ]

        self.set_source('''
            def f():
                print(x)
                return None
        ''')

        for r in range(1, len(base_flags) + 1):
            for choices in itertools.combinations(base_flags, r=r):
                for args in itertools.product(*choices):
                    with self.subTest(args=args[1:]):
                        _ = self.invoke_dis(*args)

        with self.assertRaises(SystemExit):
            # suppress argparse error message
            with contextlib.redirect_stderr(io.StringIO()):
                _ = self.invoke_dis('--unknown')

    def test_show_cache(self):
        # test 'python -m dis -C/--show-caches'