测试类@Transcational影响事务服务层的工作方式

我正在为我的Spring Boot应用程序Rest控制器编写集成测试。

当我用它注释测试类时，它不能按预期工作，当我删除注释时，它通过得很好。@Transactional

1. 在测试类上使用是否意味着绝对不会将任何内容写入数据库？我的其他测试工作正常！他们或多或少做同样的工作。它们写入/更新/读取，但此测试测试删除终结点。@Transactional

2. 如果用@Transactional注释测试类意味着无法控制数据持久性，那么为什么人们甚至在测试中使用它呢？我将实体管理器注入测试类并调用和，它没有帮助。flushclear

3. 即使数据没有写入数据库，它们也会持久化，对吧？调用难道不应该从持久性上下文中删除该项目吗？repository.delete

4. 不影响数据库（删除）的代码位于服务层中。它是从我正在测试的控制器内部调用的，而不是从测试类中调用的。我期望它能工作，无论测试类是否带有注释。@Transacational

注意服务层为@Transactional

它位于服务层中，由控制器调用。它在测试中不称为表单。

public void delete(long groupId, String username) {
    Group group = this.loadById(groupId);
    User user = userService.loadByUsername(username);
    groupRepository.delete(groupId);
}

编辑 1

失败的测试的代码：

/*
 * Deleting a group shouldn't delete the members of that group
 */
@Test
public void testDeleteGroupWithMembers() throws Exception {
    Principal mockPrincipal = Mockito.mock(Principal.class);
    Mockito.when(mockPrincipal.getName()).thenReturn(DUMMY_USERNAME);

    User admin = userTestingUtil.createUser(DUMMY_USERNAME, DUMMY_USER_NAME, null, null);
    Group group = groupTestingUtil.createGroup(DUMMY_GROUP_NAME, DUMMY_GROUP_DESCRIPTION, DUMMY_IMAGE_ID, admin);

    User member = userTestingUtil.createUser("test1@test.test", "testUser1" , null, null);
    group.addMember(member);

    RequestBuilder requestBuilder = MockMvcRequestBuilders
            .delete(GROUP_ENDPOINT_URL + group.getId())
            .accept(MediaType.APPLICATION_JSON)
            .contentType(MediaType.APPLICATION_JSON)
            .principal(mockPrincipal);

    MvcResult result = mockMvc.perform(requestBuilder).andReturn();
    MockHttpServletResponse response = result.getResponse();
    int status = response.getStatus();
    String content = response.getContentAsString();
    Assert.assertEquals("wrong response status", 200, status);
    Assert.assertEquals("wrong response content", "", content);
    //This test fails, as the group is not yet deleted from the repo
    Assert.assertEquals("there should be no group left", 0, Lists.newArrayList(groupRepository.findAll()).size());
    Assert.assertEquals("wrong number of users exist", 2, Lists.newArrayList(userRepository.findAll()).size());
    Assert.assertTrue("admin shouldn't get deleted when deleting a group", userRepository.findById(admin.getId()) != null);
    Assert.assertTrue("group members shouldn't get deleted when deleting a group", userRepository.findById(member.getId()) != null);
}

在同一测试类中工作的测试的代码：

@Test
public void testCreateGroup() throws Exception {
    Principal mockPrincipal = Mockito.mock(Principal.class);
    Mockito.when(mockPrincipal.getName()).thenReturn(DUMMY_USERNAME);

    User user = userTestingUtil.createUser(DUMMY_USERNAME, DUMMY_USER_NAME, null, null);

    JSONObject jo = new JSONObject();
    jo.put(NAME_FIELD_NAME, DUMMY_GROUP_NAME);
    jo.put(DESCRIPTION_FIELD_NAME, DUMMY_GROUP_DESCRIPTION);
    jo.put(IMAGE_FIELD_NAME, DUMMY_IMAGE);
    String testGroupJson = jo.toString();

    RequestBuilder requestBuilder = MockMvcRequestBuilders
            .post(GROUP_ENDPOINT_URL).content(testGroupJson)
            .accept(MediaType.APPLICATION_JSON)
            .contentType(MediaType.APPLICATION_JSON)
            .principal(mockPrincipal);

    MvcResult result = mockMvc.perform(requestBuilder).andReturn();
    MockHttpServletResponse response = result.getResponse();
    int status = response.getStatus();
    String content = response.getContentAsString();

    List<Group> createdGroups = Lists.newArrayList(groupRepository.findAll());
    Group createdGroup = createdGroups.get(0);

    Assert.assertEquals("wrong response status", 200, status);
    Assert.assertEquals("wrong response content", "", content);
    Assert.assertEquals("wrong number of groups created", 1, createdGroups.size());
    Assert.assertEquals("wrong group name", DUMMY_GROUP_NAME, createdGroup.getName());
    Assert.assertEquals("wrong group description", DUMMY_GROUP_DESCRIPTION, createdGroup.getDescription());
    Assert.assertEquals("wrong admin is assigned to the group", user.getId(), createdGroup.getAdmin().getId());
    List<Group> groups = userTestingUtil.getOwnedGroups(user.getId());
    Assert.assertEquals("wrong number of groups created for the admin", 1, groups.size());
    Assert.assertEquals("wrong group is assigned to the admin", user.getOwnedGroups().get(0).getId(), createdGroup.getAdmin().getId());
    Assert.assertTrue("image file was not created", CommonUtils.getImageFile(createdGroup.getImageId()).exists());
}

在 中创建和删除方法：GroupService

public void create(String groupName, String description, String image, String username) throws IOException {
    User user = userService.loadByUsername(username);
    Group group = new Group();
    group.setAdmin(user);
    group.setName(groupName);
    group.setDescription(description);
    String imageId = CommonUtils.decodeBase64AndSaveImage(image);
    if (imageId != null) {
        group.setImageId(imageId);
    }
    user.addOwnedGroup(group);
    groupRepository.save(group);
    logger.debug("Group with name " + group.getName() + " and id " + group.getId() + " was created");
}

public void delete(long groupId, String username) {
    Group group = this.loadById(groupId);
    User user = userService.loadByUsername(username);
    validateAdminAccessToGroup(group, user);
    groupRepository.delete(groupId);
    logger.debug("Group with id " + groupId + " was deleted");
}

其余控制器的代码：

/*
 * Create a group
 */
@RequestMapping(path = "", method = RequestMethod.POST)
public void create(@RequestBody PostGroupDto groupDto, Principal principal, BindingResult result) throws IOException {
    createGroupDtoValidator.validate(groupDto, result);
    if (result.hasErrors()) {
        throw new ValidationException(result.getFieldError().getCode());
    }
    groupService.create(groupDto.getName(), groupDto.getDescription(), groupDto.getImage(), principal.getName());
}

/*
 * Delete a group
 */
@RequestMapping(path = "/{groupId}", method = RequestMethod.DELETE)
public void delete(@PathVariable long groupId, Principal principal) {
    groupService.delete(groupId, principal.getName());
}

编辑 2

我尝试删除而不是，它也不起作用。在相同的方法（组服务层的方法）中，创建组可以工作，但删除不起作用！UserGroupdelete