对Mapper转换方法进行单元测试的正确方法

时间:2018-01-16 11:23:01

标签: java unit-testing mockito mapper

我有一个Mapper类,其中有一个方法可以将一种类型的用户转换为另一种类型的用户:

/**
 * Transform new {@link User} to legacy {@link com.whisbi.whisbiforstores.bo.bean.User}.
 * @param user User to transform.
 * @return Transformed user.
 * @throws MappingException If an error occurred when transforming.
 */
public com.whisbi.whisbiforstores.bo.bean.User transform(User user)
        throws MappingException {

    try {

        com.whisbi.whisbiforstores.bo.bean.User legacyUser =
                new com.whisbi.whisbiforstores.bo.bean.User();
        legacyUser.setIdUser(user.getIdUser());
        legacyUser.setIdUserType(user.getIdUserType());
        legacyUser.setName(user.getName());
        legacyUser.setSurname(user.getSurname());
        legacyUser.setEmail(user.getEmail());
        legacyUser.setUserAccount(user.getUserAccount());
        legacyUser.setPassword(user.getPassword());
        legacyUser.setUserType(user.getUserType());
        legacyUser.setIsOnlyAgent(user.isIsOnlyAgent());
        legacyUser.setAgentId(user.getAgentId());
        legacyUser.setIdVaAgent(user.getIdVaAgent());
        legacyUser.setDesktopUrl(user.getDesktopUrl());

        return legacyUser;

    } catch (Exception e){
        throw new MappingException("Error when mapping User to legacy User: "
                + e.getMessage());
    }
}

我已经编写了一个测试来确保映射成功:

@Test
public void GivenUser_WhenTransformToLegacyUser_LegacyUserIsReturned()
        throws Exception {

    final UUID userId = UUID.randomUUID();
    final UUID userTypeId = UUID.randomUUID();
    final String name = "name";
    final String surname = "surname";
    final String email = "email";
    final String userAccount = "user_account";
    final String password = "password";
    final String userType = "user_type";
    final boolean isOnlyAgent = getRandomBoolean();
    final UUID agentId = UUID.randomUUID();
    final UUID vaAgentId = UUID.randomUUID();
    final String desktopUrl = "desktop_url";

    final User user = mock(User.class);
    when(user.getIdUser()).thenReturn(userId);
    when(user.getIdUserType()).thenReturn(userTypeId);
    when(user.getName()).thenReturn(name);
    when(user.getSurname()).thenReturn(surname);
    when(user.getEmail()).thenReturn(email);
    when(user.getUserAccount()).thenReturn(userAccount);
    when(user.getPassword()).thenReturn(password);
    when(user.getUserType()).thenReturn(userType);
    when(user.isIsOnlyAgent()).thenReturn(isOnlyAgent);
    when(user.getAgentId()).thenReturn(agentId);
    when(user.getIdVaAgent()).thenReturn(vaAgentId);
    when(user.getDesktopUrl()).thenReturn(desktopUrl);

    com.whisbi.whisbiforstores.bo.bean.User legacyUser =
            mMapper.transform(user);

    assertEquals(legacyUser.getIdUser(), userId);
    assertEquals(legacyUser.getIdUserType(), userTypeId);
    assertEquals(legacyUser.getName(), name);
    assertEquals(legacyUser.getSurname(), surname);
    assertEquals(legacyUser.getEmail(), email);
    assertEquals(legacyUser.getUserAccount(), userAccount);
    assertEquals(legacyUser.getPassword(), password);
    assertEquals(legacyUser.getUserType(), userType);
    assertEquals(legacyUser.isIsOnlyAgent(), isOnlyAgent);
    assertEquals(legacyUser.getAgentId(), agentId);
    assertEquals(legacyUser.getIdVaAgent(), vaAgentId);
    assertEquals(legacyUser.getDesktopUrl(), desktopUrl);
}

问题是这个方法太冗长了,我的问题是:

  1. 这是在Mapper类中单元测试转换方法的正确方法吗?还有其他更优雅的方式来实现这个目标吗?
  2. 我有一个coleague谁说,因为这两个模型是POJO并且只包含sets()和gets(),所以验证每个成员没有任何意义,相反她只会测试最终转换后的User是否为null
  3. 感谢。

1 个答案:

答案 0 :(得分:2)

1)如果您尝试对应用中的每个dto映射器进行单元测试,那就太过分了。根据我的经验,只有最重要的DTO映射器才能以这种方式进行单元测试(User通常是关键测试之一。)

2)我不会对输入用户使用模拟。一般规则是,如果您不需要在单元测试中模拟对象,那么就不要这样做。这是一个POJO,没有外部依赖和复杂的逻辑。尝试合并构建器模式以在单元测试中创建dtos。