Question

我正在尝试测试使用dao的类。在我的测试类中，我已经模拟了DAO并将模拟注入到我测试的类的实例中。我正在尝试制作DAO类的假对象。

@RunWith(MockitoJUnitRunner.class)
public class UserManagerTest {

    @Mock
    private UserManagerDao umDao;

    @InjectMocks
    private UserManager um = new UserManager();

    @Before
    public void initializeMockito() {
        MockitoAnnotations.initMocks(this);
    }

    public void testGetUserId() {       

    }

这是UserManager.class和Dao类

中的方法

userManager.class

public long getUserId(String email) throws Exception {
    String[] partsOfMail = email.split("@");        
    return umDao.getUserId(partsOfMail[0], partsOfMail[1]);
}

Dao class

public long getUserId(String userName, String domain) throws Exception {
    String sql = msa.getMessage("sql.select.user_id");
    Object[] params = new Object[] { userName, domain };

    List<Long> result = getJdbcTemplate().queryForList(sql, params, Long.class);

    if (result.size() > 0) {
        return result.get(0);
    }

    return 0;
}

Answer 1

见评论：

@RunWith(MockitoJUnitRunner.class)
public class UserManagerTest {

    @Mock
    private UserManagerDao umDao; // a mock object should present here 

    /* @InjectMocks should be able to create an instance 
       with mocks injected for you - you don't need to create it 
       yourself */
    @InjectMocks
    private UserManager um; // = new UserManager(); 

    /* Not required as you're using the MockitoJUnitRunner
       @Before
       public void initializeMockito() {
           MockitoAnnotations.initMocks(this);
       } */

    // Add test annotation (assuming JUnit4 as you're not extending TestCase)
    @Test 
    public void testGetUserId() {   
        // Both these fields should not be null
        Assert.assertNotNull(umDao);
        Assert.assertNotNull(um);
    }

有关详细信息，请查看MockitoJUnitRunner和InjectMocks文档。

Mockito的文档，其中包含许多示例，可以找到here。

Answer 2

你的问题是什么？如果你问如何在DAO中模拟一些方法，这是一个简单的例子。

@Test
public void testGetUserId() {       
    when(umDao.getUserId(<PARS>)).thenReturn(1L);
    assertThat(um.getUserId(<PAR>)).isEqualTo(1L);
}

JUnit创建dao假对象JAVA

2 个答案: