Mockito NullPointerException

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问题描述

我按照@hoaz的建议。但是，我得到nullpointer异常

I followed what @hoaz suggested. However, I am getting nullpointer exception

@RunWith(MockitoJUnitRunner.class)
public class GeneralConfigServiceImplTest  {

@InjectMocks private GeneralConfigService generalConfigService;
@Mock private SomeDao someDao;
@Mock private ExternalDependencyClass externalDependencyObject

@Test
public void testAddGeneralConfigCallDAOSuccess() {
    when(someDao.findMe(any(String.Class))).thenReturn(new ArrayList<String>(Arrays.asList("1234")));

    //println works here, I am able to get collection from my mocked DAO

    // Calling the actual service function
    generalConfigService.process(externalDependencyObject)
    }
}

在我的代码中，它是这样的：

In my Code it's like this:

import com.xyz.ExternalDependencyClass;

public class  GeneralConfigService{

private SomeDao someDao;

public void process(ExternalDependencyClass externalDependencyObject){

// function using Mockito
Collection<String> result = someDao.findMe(externalDependencyObject.getId.toString())
    }
}

我也注意到DAO是空的所以我做了这个（只是提到，我做了下面的步骤尝试，我知道springUnit和Mockito或xyz之间的区别）：

I also notice that DAO was null so I did this(Just to mention, I did the below step to try, I know the difference between springUnit and Mockito or xyz):

@Autowired
private SomeDao someDao;

@John B解决方案解决了我的问题。不过我想提一下对我不起作用的东西。这是我更新的单元测试

@John B solution solved my problem. However I would like to mention what did not work for me. This is my updated unit test

@Test
public void testAddGeneralConfigCallDAOSuccess() {
    /*
    This does not work
    externalDependencyObject.setId(new ExternalKey("pk_1"));
    // verify statement works and I thought that the class in test when call the getId
    // it will be able to get the ExternalKey object
    //verify(externalDependencyObject.setId(new ExternalKey("pk_1")));
    */

    // This works
    when(externalDependencyObject.getId()).thenReturn(new ExternalKey("pk_1"));
    when(someDao.findMe(any(String.Class))).thenReturn(new ArrayList<String>(Arrays.asList("1234")));

    ....
    // Calling the actual service function
    generalConfigService.process(externalDependencyObject)
    }

在以下问题中引用此问题：

Referenced this question in :

externalDependencyObject

问题描述

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