什么是Mockito？
官网解释：
Mockito is a mocking framework that tastes really good. It lets you write beautiful tests with a clean & simple API. Mockito doesn’t give you hangover because the tests are very readable and they produce clean verification errors.
也就是说Mocket 非常具有可读性，并且产出非常干净的错误输出。我使用的原因是不想链接数据库，所以使用它。
可以查看下面的Blog：因为我也是从此转载的
http://blog.csdn.net/sdyy321/article/details/38757135/
详细讲解：
http://blog.csdn.net/bboyfeiyu/article/details/52127551
碰到的问题：
Could not initialize plugin: interface org.mockito.plugins.MockMaker
需要添加下面的Jar包
- byte-buddy-1.6.5.jar
- byte-buddy-agent-1.6.5.jar
- objenesis-2.5.jar
Since Mockito 2.0.2 beta, Mockito-core has dependencies.