When all of the unit tests pass, run the original functional test to see if it is passing or if it needs modification.

当所有的单元测试都结束以后，运行最初的功能测试，看看它是否能够通过，或者是否需要修改。

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If a unit test crosses class boundaries, it might be a functional test.

如果单元测试跨越类边界，则它就可能是功能测试。

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If a unit test is becoming very complicated, it might be a functional test.

如果单元测试变得很复杂，则它可能是功能测试。

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