不推荐使用 MockitoJUnitRunner

I'm trying to make a unit test with @InjectMocks and @Mock.

@RunWith(MockitoJUnitRunner.class)
public class ProblemDefinitionTest {

    @InjectMocks
    ProblemDefinition problemDefinition;

    @Mock
    Matrix matrixMock;    

    @Test
    public void sanityCheck() {
        Assert.assertNotNull(problemDefinition);
        Assert.assertNotNull(matrixMock);
    }
}

当我不包含 @RunWith 注释时，测试会失败.但是