说明：  集成测试的目的是确保各单元组合在一起后能够按既定意图协作运行，并确保增量的行为正 确。它所测试的内容包括单元间的接口以及集成后的功能。使用黑盒测试方法测试集成的功 能。并且对以前的集成进行回归测试。
(integration testing is designed to ensure that the modules can be combined according to the established after intention collaboration operations, and ensure the correct behavior increment. It will include testing the interface modules and integrated the functions. TESTING method to test the use of integrated functions. And right before the Integrated regression testing.)