def test_visit(self):
obj = Base(None, None)
obj.called = Mock()
obj.visit("called", "with", keyword="args")
obj.called.assert_called_once_with("with", keyword="args")
def test_nop_visit(self):
obj = Base(None, None)
obj.not_called = Mock()
obj.visit("missing_method")
obj.not_called.assert_not_called()