def test_add_web_asset(self): from pyramid_webassets import add_webasset config = Mock() config.registry = Mock() queryUtility = Mock() env = Mock() register = Mock() env.register = register queryUtility.return_value = env config.registry.queryUtility = queryUtility add_webasset(config, 'foo', 'bar') register.assert_called_with('foo', 'bar')