Mock利器：PowerMock

powerMock不仅支持接口mock，final类、静态类、静态方法、私有方法都支持mock，还是很强大的；

1.gradle引用：

myonlycompile('org.powermock:powermock-module-junit4:1.6.4')
myonlycompile('org.powermock:powermock-api-mockito:1.6.4')

2.测试代码

@RunWith(PowerMockRunner.class)

@PrepareForTest(mockTest.FinalUser.class)

public class mockTest {

    @Test

    public void testMockInterface() {

        IService svc = PowerMockito.mock(IService.class);

        PowerMockito.when(svc.getMsg("aa")).thenReturn("my name is aa");

        assertEquals("my name is aa", svc.getMsg("aa"));

    }

    @Test

    public void testMockClass() {

        User user = PowerMockito.mock(User.class);

        PowerMockito.when(user.getCount()).thenReturn(5);

        assertEquals(5, user.getCount());

    }

    @Test

    public void testMockFinalClass() {

        FinalUser user = PowerMockito.mock(FinalUser.class);

        PowerMockito.when(user.getCount()).thenReturn(5);

        assertEquals(5, user.getCount());

        PowerMockito.when(user.getNum()).thenReturn(8);

        assertEquals(8, user.getNum());

    }

    @Test

    public void testMockStaticClass() {

        PowerMockito.mockStatic(FinalUser.class);

        PowerMockito.when(FinalUser.getName()).thenReturn("MY");

        assertEquals("MY", FinalUser.getName());

    }

    static interface IService {

        String getMsg(String msg);

        void addMsg(String msg);

    }

    static class User {

        private String name;

        public int getCount() {

            throw new NotImplementedException();

        }

    }

    static final class FinalUser {

        private String name;

        public static String getName() {

            throw new NotImplementedException();

        }

        public int getCount() {

            throw new NotImplementedException();

        }

        private int getNum(){

            throw new NotImplementedException();

        }

    }

}

如果是静态类、方法、final类、私有方法的需要加上

@RunWith(PowerMockRunner.class)
@PrepareForTest(mockTest.FinalUser.class)

Mock利器：PowerMock的相关教程结束。