test_warnings.py 文件源码

def test_onceregistry(self):
        # Replacing or removing the onceregistry should be okay.
        global __warningregistry__
        message = UserWarning('onceregistry test')
        try:
            original_registry = self.module.onceregistry
            __warningregistry__ = {}
            with original_warnings.catch_warnings(record=True,
                    module=self.module) as w:
                self.module.resetwarnings()
                self.module.filterwarnings("once", category=UserWarning)
                self.module.warn_explicit(message, UserWarning, "file", 42)
                self.assertEqual(w[-1].message, message)
                del w[:]
                self.module.warn_explicit(message, UserWarning, "file", 42)
                self.assertEqual(len(w), 0)
                # Test the resetting of onceregistry.
                self.module.onceregistry = {}
                __warningregistry__ = {}
                self.module.warn('onceregistry test')
                self.assertEqual(w[-1].message.args, message.args)
                # Removal of onceregistry is okay.
                del w[:]
                del self.module.onceregistry
                __warningregistry__ = {}
                self.module.warn_explicit(message, UserWarning, "file", 42)
                self.assertEqual(len(w), 0)
        finally:
            self.module.onceregistry = original_registry