Full coverage was very expensive and difficult to achieve, because we had to hand-inspect our code to determine which lines were and were not hit by the test.
完全的覆盖是非常昂贵的并且很难达到，因为我们必须要手工的检查我们的代码以确定哪一行代码没有被测试覆盖到。
I still want to have a test so I can have the confidence that comes from a full regression suite, but I have to write some code first, then write a test.
我仍然希望进行测试，这样我可以从完整的回归套件中获得信心，但我必须先编写一些代码，然后编写测试。
Listing 4 shows the full code of the test case object.
清单4显示了测试用例对象的完整代码。
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