mock时忽略不必要的初始化

PowerMockito.mockStatic时忽略加载类的静态field，比如想PowerMockito.mockStatic(ClassA.class)，ClassA如下

public class ClassA {
 
private static final boolean CONF_FLAG = Configuration.getConfig()
.get(Status.Initialization).getConfFlag(); // throws an NPE
 
public static methodTobeCalledByOtherTestMethod(TestObject a){
...
 }
}

filed CONF_FLAG需要调用一些其他依赖，而这些依赖不可获得，当mock时会抛异常，可以使用：

@RunWith(PowerMockRunner.class)
@PrepareForTest({ClassA.class})
@SuppressStaticInitializationFor("com.xxx.xxx.ClassA")
public class XXXTest {
 
    @Test
    public void testXXX() {
        PowerMockito.mockStatic(ClassA.class);
        ....
    }
}

使用SuppressStaticInitializationFor就不会去初始化CONF_FLAG。

另外其他忽略的配置请见：Suppress Unwanted Behavior

参考：What am I doing wrong mocking this private static final variable using mockito and reflection?

修改某个静态函数的返回值：PowerMock, mock a static method, THEN call real methods on all other statics