test_fileinput.py 文件源码

def do_test_use_builtin_open(self, filename, mode):
        original_open = self.replace_builtin_open(self.fake_open)
        try:
            result = fileinput.hook_compressed(filename, mode)
        finally:
            self.replace_builtin_open(original_open)

        self.assertEqual(self.fake_open.invocation_count, 1)
        self.assertEqual(self.fake_open.last_invocation,
                         ((filename, mode), {}))