弹簧jdbcTemplate Junit

Question

我有一个DAO应用程序，如下所示。我想上这节课。我的班长得像这样。

    public class DaoImpl implements Dao{

    @Override
    public User getUserInfo(String userid) {
        return getTemplate().queryForObject(QUERY, new Object[] { userid },
                new BeanPropertyRowMapper<User>(User.class));
     }

   }

我的junit类看起来像这样

@RunWith(SpringJUnit4ClassRunner.class)
public class DaoImplTests{

    @Autowired
    private Dao dao;

    @Mock
    JdbcTemplate jdbcTemplate;

    @Test
    public void testUsingMockito() {
        try {
            User mockedUserInfo = new User();
            //setters
            mockedUserInfo.setXXX;
            mockedUserInfo.setYYY;

            Mockito.when(((JdbcDaoSupport)dao.getTemplate())).thenReturn(jdbcTemplate);
            Mockito.when(jdbcTemplate.queryForObject(Mockito.anyString(), Mockito.any(Object[].class),
                    Mockito.any(RowMapper.class))).thenReturn(mockedUserInfo);
            User userInfo = dao.getUserInfo("");
            Assert.assertNotNull(userInfo);
            Assert.assertEquals(mockedUserInfo.getXXX(), userInfo.getXXX());
            //few more assertions
        } catch (Exception e) {
            Assert.fail(" : " + e.getMessage());
        }
    }

}

当我执行这个测试用例时，我会得到mockito的以下异常。

org.mockito.exceptions.misusing.MissingMethodInvocationException: 
when() requires an argument which has to be 'a method call on a mock'.
For example:
    when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
   Those methods *cannot* be stubbed/verified.
2. inside when() you don't call method on mock but on some other object.
3. the parent of the mocked class is not public.
   It is a limitation of the mock engine.

我的问题是：

1. 如何让我的班级
2. 之所以会出现此异常，是因为getJdbcTemplate是最终的JdbcDaoSupport类。对这种方法有什么替代办法吗？

我用post Spring jdbcTemplate unit testing编写了我的junit

但是，看起来不起作用。

Answer 1

你的问题在于这一行：

Mockito.when(((JdbcDaoSupport)dao.getTemplate())).thenReturn(jdbcTemplate);

您已经用@Autowired注释了dao，所以它不是一个模拟的对象。您可能要做的是使用SpringTestReflectionUtils将dao中的jdbcTemplate设置为模拟对象。