如何在2.7.x中使用Mockito.doReturn

Question

Mockito版：v2.7.5/19。

例外：

org.mockito.exceptions.misusing.UnfinishedStubbingException: 
Unfinished stubbing detected here:
-> at com.mckesson.dex.dao.code.CodeDaoMockTest.testExcluded(CodeDaoMockTest.java:33)

E.g. thenReturn() may be missing.
Examples of correct stubbing:
    when(mock.isOk()).thenReturn(true);
    when(mock.isOk()).thenThrow(exception);
    doThrow(exception).when(mock).someVoidMethod();
Hints:
 1. missing thenReturn()
 2. you are trying to stub a final method, which is not supported
 3: you are stubbing the behaviour of another mock inside before 'thenReturn' instruction if completed

这是我的代码：

@RunWith(MockitoJUnitRunner.class)
public class CodeDaoMockTest
{
    @Mock( name = "entityManager") private HibernateEntityManager entityManager;
    @Spy @InjectMocks
    private CodeDao dao;

    @Test
    public void testExcluded() throws Exception
    {

        LabTestClassification ltc1 = new LabTestClassification();
        LabTestClassification ltc2 = new LabTestClassification();

        Mockito.doReturn( 533965, 533966)
            .when( dao.getNextCodeIntegerFromSequence( ltc1  ) );

值得注意的是，如果我这样写：

Mockito.when( dao.getNextCodeIntegerFromSequence( ltc1  ) ).thenReturn( 533965 );

我在调用entityManager时得到一个空指针。我的理解是，如果我使用doReturn然后实际的getNext...永远不会被调用，这是目标。

Answer 1

你很亲密尝试使用不同的语法：

Mockito.doReturn(533965).when(dao).getNextCodeIntegerFromSequence(ltc1);