测试驱动开发，英文全称Test-Driven Development，简称TDD，是一种不同于传统软件开发流程的新型的开发方法。它要求在编写某个功能的代码之前先编写测试代码，然后只编写使测试通过的功能代码，通过测试来推动整个开发的进行。这有助于编写简洁可用和高质量的代码，并加速开发过程。-Test-driven Development, English full name Test- Driven Development, hereinafter referred to as TDD, is a kind of different　traditional software Development process of the Development of new methods.It first before writing a feature code to write test code, and then make the function of the test pass code, only through the test to promote the overall development.It helps to write concise and high quality code available, and accelerate the development process.