Test-Driven Development

测试驱动开发

Write a test that describes the behavior you want. Run it. It should fail.

编写描述预期实现行为的测试用例，运行测试，此时测试应当失败。

Write the minimum code to make the test pass.

编写最少的代码让测试通过即可。

Make the code good. Tests must still pass.

优化代码质量，此过程中必须保证所有测试仍然通过。

A good test:

一个优质的测试需要具备以下特性：