java - 使用mockito调用Service类的嵌套方法时出现NullPointerException

Question

我正在为我的服务类编写 JUnit 测试用例。我创建了虚拟数据来理解我的场景。

@Service
MainClass {
    @Autowired
    C c;
    public void someServiceMethod(){
        ResultClass someResult = c.getResult(string,string, int, int, List<String>,boolean);
    }
}

@Service
public class C {
    @Autowired
    SomeRepository someRepository;
    public ResultClass getResult(string,string, int, int, List<String>,boolean){
        ABC returnSomeClassObject = someRepository.getSomeData(String,int,int);
    }
}

@Test
MainClassTest {
    @MockBean
    SomeRepository someRepository;
    when(someRepository.getSomeData(anyString(),anyInt(),anyInt())).thenReturn(SomeRepository);

    //calling MainClass method
    MainClass.someServiceMethod();
}

C 类的 getSomeData() 方法返回 ABC 类对象，该对象为 NULL，然后设置为另一个相同的类类型对象。设置值后，我收到 NULLPointerException 因为 ABC 为 NULL。有人知道我哪里出错了吗？

Answer 1

编写模拟语句时没有返回预期的对象

    @Service
public class C {
    @Autowired
    SomeRepository someRepository;
    public ResultClass getResult(string,string, int, int, List<String>,boolean){
        ABC returnSomeClassObject = someRepository.getSomeData(String,int,int);

        //Your return type should be ResultClass 
        // Where your return statement
        // What is ABC?
    }
}

@Test
MainClassTest {
    @MockBean
    SomeRepository someRepository;
    when(someRepository.getSomeData(anyString(),anyInt(),anyInt())).thenReturn(SomeRepository);
    // Why are you returning SomeRepository, This Should return object of ABC

@MockBean 
ABC mockResultClass
when(someRepository.getSomeData(anyString(),anyInt(),anyInt())).thenReturn(mockResultClass);

    //calling MainClass method
    MainClass.someServiceMethod();
}