有时它会被引用作为不同的分支、路径，或者变异性识别，在测试设计者识别各种方法的所有用例中，用户或者外部的系统都可以执行这个用例。

While it is variously referred to as branch, path, or variability identification, in all cases the test designer identifies the various ways the user or external system can execute the use case.

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诸如Litmusapp这样的服务可以集成到您的测试和开发流程中，提供版本化支持和方法，向外部客户机发布测试结果。

Some services, like Litmusapp, can integrate with your testing and development workflows, offering versioning support and ways to publish test results to external clients.

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为了测试Team Room的通知功能，而不必访问外部网络，也不使用电子邮件检验系统，我们可以编写mock测试方法。

In order to test our Team Room notification function without accessing the external network or having an email validation system in place, we can write mock test methods.

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