只向组件传递有效数据，并且确保这些数据会按照您期望的一样进行处理。

Pass only valid data to a component and be sure that it will be interpreted as you expect.

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只有当at所交互的软件和硬件拥有使其易访问的所有必要组件时，AT才是有效的。

An AT can be effective only when the software and hardware with which it interfaces has all of the components necessary to make it accessible.

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对于进行测试的组件中的每个有效操作，确保从测试器组件中创建一个到它的连接。

For each valid action in the component under test, ensure that a wire is created to it from the tester component.

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