test_standard_library.py 文件源码

def test_detect_hooks(self):
        """
        Tests whether the future.standard_library.detect_hooks is doing
        its job.
        """
        standard_library.install_hooks()
        if utils.PY2:
            self.assertTrue(standard_library.detect_hooks())

        meta_path = copy.copy(sys.meta_path)

        standard_library.remove_hooks()
        if utils.PY2:
            self.assertEqual(len(meta_path), len(sys.meta_path) + 1)
            self.assertFalse(standard_library.detect_hooks())