test_warnings.py 文件源码

def test_default_action(self):
        # Replacing or removing defaultaction should be okay.
        message = UserWarning("defaultaction test")
        original = self.module.defaultaction
        try:
            with original_warnings.catch_warnings(record=True,
                    module=self.module) as w:
                self.module.resetwarnings()
                registry = {}
                self.module.warn_explicit(message, UserWarning, "<test>", 42,
                                            registry=registry)
                self.assertEqual(w[-1].message, message)
                self.assertEqual(len(w), 1)
                # One actual registry key plus the "version" key
                self.assertEqual(len(registry), 2)
                self.assertIn("version", registry)
                del w[:]
                # Test removal.
                del self.module.defaultaction
                __warningregistry__ = {}
                registry = {}
                self.module.warn_explicit(message, UserWarning, "<test>", 43,
                                            registry=registry)
                self.assertEqual(w[-1].message, message)
                self.assertEqual(len(w), 1)
                self.assertEqual(len(registry), 2)
                del w[:]
                # Test setting.
                self.module.defaultaction = "ignore"
                __warningregistry__ = {}
                registry = {}
                self.module.warn_explicit(message, UserWarning, "<test>", 44,
                                            registry=registry)
                self.assertEqual(len(w), 0)
        finally:
            self.module.defaultaction = original