PHP 的测试
PHPUNIT 安装上。
引入基本的前置环境及条件。
写主要的边界条件。
考虑解耦。
细点的说，就是把代码写成类，方法的样子。
不要是面向过程的。一行接一行的。这样子的话，不加入断点就没法测试了。
但是加入断点就不是我们追求的了。不干扰工作代码的单元测试。
关于解耦：还有一点就是方便比较小的单元来测试
这样方便判断测试结果。
但是又不能过小，过小测试的意义不大了。
单元测试还必须在开发过程中写。
关于测试的文章，主要是单元测试：
http://segmentfault.com/q/1010000000692485
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