我试图在下面的函数createrequest（temp）中存根一个方法调用的响应。我在单元测试中 Mockito.when(soapMessageFactory.createRequest()).thenReturn(Mockito.mock(SOAPMessage.class)) 我需要一个soapmessage.class的示例，但是当前它返回null我有一个mock messagefactory，并将我的测试类注解为， @SpringBootTest . 我还试着做了一个 when() 对于整个 callSoapService 只是回一个电话 List<String> 但这也没有达到我的预期。单元测试的结果返回大小0并抛出空指针，因为soapmessage为空。

public List<String> callSoapService(String a, String b, List<String> temp) throws SOAPException, IOException, XWSSecurityException{

        SOAPMessage request = createRequest(temp);
        return null;  // dont worry about this for now
}

soapmessagefactory.createmessage（）

public SOAPMessage createRequest(String a) throws SOAPException {
        SOAPMessage message = soapMessageFactory.createMessage();
        message.getMimeHeaders().addHeader("SOAPAction",
            testManagerConfiguration.getSOAPUrl() + "/endpoint");   // fails here, null pointer
    }

下面是我的单元测试

@Before
    public void setUp(){
     MockitoAnnotations.openMocks(this);
    }

    @InjectMocks
    private SoapClientImpl soapClient;

    @Mock
    private MessageFactory soapMessageFactory;

    @Test
    public void testSOAP() {

Mockito.when(soapMessageFactory.createRequest()).thenReturn(Mockito.mock(SOAPMessage.class));
            List<String> result = soapClient.callSoapService("name","b",Arrays.asList("1112567"));
            Assertions.assertEquals(result.size(),1);
        }