Mockito - thenReturn always returns null object

Question

I'm trying to implement Mockito to test a particular method but the .thenReturn(...) seems to always be returning a null object instead of what I intended:

CUT:

public class TestClassFacade {    // injected via Spring   private InterfaceBP bpService;    public void setBpService(InterfaceBP bpService) {        this.bpService = bpService;   }    public TestVO getTestData(String testString) throws Exception {      BPRequestVO bpRequestVO = new BPRequestVO();      bpRequestVO.setGroupNumber(testString) ;     bpRequestVO.setProductType("ALL") ;                bpRequestVO.setProfileType("Required - TEST") ;      IBPServiceResponse serviceResponse = bpService.getProduct(bpRequestVO);  //PROBLEM      if (serviceResponse.getMessage().equalsIgnoreCase("BOB")) {          throw new Exception();      } else {          TestVO testVO = new TestVO();     }      return testVO;   }  } 

Spring Configuration:

<bean id="testClass" class="com.foo.TestClassFacade">     <property name="bpService" ref="bpService" />  </bean>  <bean id="bpService" class="class.cloud.BPService" /> 

Mockito Test Method:

@RunWith(MockitoJUnitRunner.class) public class BaseTest {      @Mock BPService mockBPService;     @InjectMocks TestClassFacade mockTestClassFacade;      private String testString = null;     private BPRequestVO someBPRequestVO = new BPRequestVO();     private IBPServiceResponse invalidServiceResponse = new BPServiceResponse();      @Test (expected = Exception.class)     public void getBPData_bobStatusCode_shouldThrowException() throws Exception {          invalidServiceResponse.setMessage("BOB");          someBPRequestVO.setGroupNumber(null);         someBPRequestVO.setProductType("ALL");         someBPRequestVO.setProfileType("Required - TEST");          System.out.println("1: " + someBPRequestVO.getGroupNumber());         System.out.println("2: " + someBPRequestVO.getProductType());         System.out.println("3: " + someBPRequestVO.getProfileType());         System.out.println("4: " + someBPRequestVO.getEffectiveDate());          when(mockBPService.getProduct(someBPRequestVO)).thenReturn(invalidServiceResponse);          mockTestClassFacade.getTestData(testString);          verify(mockBPService).getProduct(someBPRequestVO);     } } 

System output:

1: null 2: ALL 3: Required - TEST 4: null 

What's happening here is that when I run the test the serviceResponse object is null on the line in the CUT marked with //PROBLEM above. My desire is to have that object be populated with my "invalidServiceResponse" object from my test method. Judging from the output of my System.out.println's it appears that my bpRequestVO matches my someBPRequestVO in content.

Could some one show me what I'm missing here?

Thanks for your time!

Answer 1

Instead of creating a equals method in your BPRequestVO class you can create a mock argument with "any(YourObject.class)" like this:

when(mockBPService.getProduct(any(BPRequestVO.class))).thenReturn(invalidServiceResponse);