英文:
Why mocked mvc test fails with exception when service is mocked?
问题
以下是翻译好的内容：
我不明白为什么这个测试会因为异常而失败？
服务类已被模拟...
@Autowired
private MockMvc mockMvc;
@MockBean
private InventoryService inventoryService;
private List<InventoryDTO> inventoryList;
@BeforeEach
void setup() {
...
}
@Test
@DisplayName("POST /inventory 测试 - 状态 200")
@WithMockUser(roles = {"PUBLISHER", "USER"})
void addItem() throws Exception {
doReturn(inventoryList.get(0)).when(inventoryService).add(any());
mockMvc.perform(
MockMvcRequestBuilders.post("/inventory")
.content(asJsonString(inventoryList.get(0)))
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON))
.andDo(MockMvcResultHandlers.print())
.andExpect(status().isOk())
.andExpect(content().json("{'name':'test1','description':'test-1-description','price':10}"))
.andReturn();
}
以下是被测试的控制器：
@RestController
public class InventoryController {
private final InventoryService inventoryService;
public InventoryController(InventoryService inventoryService) {
this.inventoryService = inventoryService;
}
@GetMapping("/inventory")
@ResponseBody
public List<InventoryDTO> allInventory(){
return inventoryService.findAll();
}
@PostMapping("/inventory")
@ResponseBody
public InventoryDTO addInventory(@RequestBody InventoryDTO inventoryDTO){
return inventoryService.add(inventoryDTO);
}
}
以下是异常信息：
org.springframework.web.util.NestedServletException: 请求处理失败；嵌套异常为 org.springframework.http.converter.HttpMessageConversionException: 类型定义错误：[simple type, class com.teamcompetencymatrix.www.dto.AuditDTO]；嵌套异常为 com.fasterxml.jackson.databind.exc.InvalidDefinitionException: 无法构造 `com.teamcompetencymatrix.www.dto.AuditDTO` 的实例（没有构造器，例如默认构造器）：无法从对象值进行反序列化（没有委托或基于属性的构造器）；位置：[源：(PushbackInputStream)；行：1，列：72]（通过引用链：com.teamcompetencymatrix.www.dto.InventoryDTO["audit"]）
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
...
据我理解，Mockito 应该模拟服务类，而测试不会进入其中...
据我所知，审计员与控制器类无关。
英文:
I don't understand why this test fails with an exception?
The service class is mocked...
@Autowired
private MockMvc mockMvc;
@MockBean
private InventoryService inventoryService;
private List<InventoryDTO> inventoryList;
@BeforeEach
void setup() {
...
}
@Test
@DisplayName("POST /inventory test - status 200")
@WithMockUser(roles = {"PUBLISHER", "USER"})
void addItem() throws Exception {
doReturn(inventoryList.get(0)).when(inventoryService).add(any());
mockMvc.perform(
MockMvcRequestBuilders.post("/inventory")
.content(asJsonString(inventoryList.get(0)))
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON))
.andDo(MockMvcResultHandlers.print())
.andExpect(status().isOk())
.andExpect(content().json("{'name':'test1','description':'test-1-description','price':10}"))
.andReturn();
}
And here is the tested controller:
@RestController
public class InventoryController {
private final InventoryService inventoryService;
public InventoryController(InventoryService inventoryService) {
this.inventoryService = inventoryService;
}
@GetMapping("/inventory")
@ResponseBody public List<InventoryDTO> allInventory(){
return inventoryService.findAll();
}
@PostMapping("/inventory")
@ResponseBody public InventoryDTO addInventory(@RequestBody InventoryDTO inventoryDTO){
return inventoryService.add(inventoryDTO);
}
And the exception:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class com.teamcompetencymatrix.www.dto.AuditDTO]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.teamcompetencymatrix.www.dto.AuditDTO` (no Creators, like default constructor, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: (PushbackInputStream); line: 1, column: 72] (through reference chain: com.teamcompetencymatrix.www.dto.InventoryDTO["audit"])
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:72)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167)
As I understand mockito should mock the Service class, and the test doesn't go inside of it...
The Auditor has nothing to the Controller class as far as I know.
答案1
得分: 1
错误信息已经表明了一切：
> 无法构造com.teamcompetencymatrix.www.dto.AuditDTO的实例（没有像默认构造函数这样的创建者存在）
请求正文无法转换为DTO，请尝试为AuditDTO添加一个空构造函数和setter。
英文:
The error says it all:
> Cannot construct instance of
> com.teamcompetencymatrix.www.dto.AuditDTO (no Creators, like default
> constructor, exist)
The request body can't be transformed into the DTO, Try adding an empty constructor and setters to the AuditDTO
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论