这些任务可以在记录测试完成之后执行，然而通常一边记录一边执行会更加方便和有效。
These tasks can be performed after recording the test as well but it is often more convenient and efficient to perform them while recording.
JUnit一直是一个单元测试框架，也就是说，其构建目的是促进单个对象的测试，它确实能够极其有效地完成此类任务。
JUnit has always been a unit-testing framework, meaning that it was built to facilitate testing single objects, and it does so quite effectively.
这个测试之所以有效，是因为计算机无法完成；而计算机不能完成的任务正在变的越来越少。
They work only because there are things computers can't do, and there are fewer and fewer of those things all the time.
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