单元测试遇到的坑

使用Mockito来来模拟外部依赖的对象，完成单元测试。结果发现when(mock.someMethod()).thenReturn 对static修饰的方法是无法设置方法调用的预期返回，与我所需的单元测试不符合。遂改用PowerMockito，PowerMock扩展了EasyMock和Mockito框架，增加了对static、final和pricvate方法mock支持等功能。

改用PowerMockito： PowerMockito.mockStatic(HttpTest.class); PowerMockito.when(HttpTest.doPost(requestOc,request,1000*20)).thenReturn(response); 报错为： org.powermock.api.mockito.ClassNotPreparedException: The class com.sf.cx.util.HttpTest not prepared for test. To prepare this class, add class to the ‘@PrepareForTest’ annotation. In case if you don’t use this annotation, add the annotation on class or method level. 解决办法是加上，@RunWith(PowerMockRunner.class) @PrepareForTest(HttpTest.class)

这是PowerMock的两个重要的注解： @RunWith(PowerMockRunner.class)语句告诉JUnit用PowerMockRunner来执行测试。 @PrepareForTest(Employee.class)语句告诉PowerMock准备Employee类进行测试。适用于模拟final类或有final, private, static, native方法的类。