To me, unit tests are fast running tests that typically test individual classes that don't have heavy external dependencies like databases.
对我来说，单元测试是快速运行的 测试，通常测试没有大的外部依赖项（如数据库）的单独的类。
Obviously, I don't have a Person class yet so my test is having some trouble running — JUnit gives me a red bar.
显然，我还没有person类，所以运行该测试会出现问题—JUnit给出了一个红条。
Obviously, I don't have a Person class yet so my test is having some trouble running — JUnit gives me a red bar.
显然，我还没有person类，所以运行该测试会出现问题—JUnit给出了一个红条。
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