Calculator is the component directory.
Calculator就是组件目录。
Using this technique, all unit tests will reside in a unit directory, all component tests in a component directory, and so on.
使用这项技术,所有的单元测试将驻留在一个unit目录中,所有的组件测试将驻留在一个component目录中,依此类推。
If you're not sure what each component, file, and directory does, the application can appear a bit overwhelming — at least at first.
如果不能确定每个组件、文件和目录的具体用途,应用程序能够显示出一些它们的主要用处——至少在开始时。
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