说明：  《.NET单元测试艺术》针对单元测试艺术这个重要主题展开讨论,引导读者从简单的测试开始,逐渐过渡到如何写出可维护、可读、可信赖的测试。
(The.net unit test art discusses the art of unit testing this important subject, guides the reader from the beginning of the simple test, gradually transition to the how to write maintainable, readable, reliable testing.)