最终，你将创建越来越多的可调用的例行程序来支持测试。

Eventually, you create more and more of these callable routines to support the tests.

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相反，他们处理可调用例行程序提供的抽象注册界面。

Instead, they deal with the abstract login interface that the callable routine provides.

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你可以在每一个测试程序中通过复制代码来为注册用户编号，或者你可以使它成为一个单一的，可调用的例行程序。

You could copy the code to handle the login into every test program, or you can make it into a single, callable routine.

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