def METHOD_NAME(self):
    self.validate_op.params = [
        MakoParam(name="split_string", type=Type.STRING),
        MakoParam(name="split_string", type=Type.STRING),
    ]
    try:
        self.validate_op._validate()
    except ValueError as e:
        self.assertEqual(str(e), "MakoTemplateOperation 字符串分割后拼接 found duplicate param")