test_warnings.py 文件源码

def test_warn_explicit_type_errors(self):
        # warn_explicit() should error out gracefully if it is given objects
        # of the wrong types.
        # lineno is expected to be an integer.
        self.assertRaises(TypeError, self.module.warn_explicit,
                            None, UserWarning, None, None)
        # Either 'message' needs to be an instance of Warning or 'category'
        # needs to be a subclass.
        self.assertRaises(TypeError, self.module.warn_explicit,
                            None, None, None, 1)
        # 'registry' must be a dict or None.
        self.assertRaises((TypeError, AttributeError),
                            self.module.warn_explicit,
                            None, Warning, None, 1, registry=42)