As I said last month, writing just enough code to make a test pass keeps code simpler and keeps me focused on the task at hand.
正如我上月所述，编写足够的代码以使测试通过可以简化程序代码，从而有更多的精力关注手边的工作。
TDD requires that you do the opposite: write the test first and allow it to inform how you write the code that makes the test pass.
TDD要求您反过来做：先编写测试，并让它来提示如何编写可以让测试通过的代码。
You are not allowed to write any production code unless it is to make a failing unit test pass.
在写完“红色”(无法通过测试)的单元测试代码之前，不允许写任何的产品代码。
You are not allowed to write any production code unless it is to make a failing unit test pass.
在写完“红色”(无法通过测试)的单元测试代码之前，不允许写任何的产品代码。
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