如何在mockMvc中使用kotlin风格？

Question

我用mockMvc进行了经典风格测试，它有效：

    val result = mockMvc.perform(
        post(path)
            .contentType(MediaType.APPLICATION_JSON)
            .content(objectMapper.writeValueAsString(groupCreateDto)),
    ).andExpect(status().isBadRequest)
        .andReturn()    

我在这里认识到Kotlin有特定的风格，我决定重写：

val result = mockMvc.post(path) {
    contentType = MediaType.APPLICATION_JSON
    content = content().string(objectMapper.writeValueAsString(groupCreateDto))
}.andExpect { status().isBadRequest }
    .andReturn()

但它不起作用：

2023-10-03T13:19:34.536+03:00 ERROR 17912 --- [    Test worker] ***.RestExceptionHandler   : JSON parse error: Unrecognized token 'org': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')

MockHttpServletRequest:
      HTTP Method = POST
      Request URI = /api/v1/groups
       Parameters = {}
          Headers = [Content-Type:"application/json", Content-Length:"106"]
             Body = <no character encoding set>
    Session Attrs = {}

Handler:
             Type = ****.MyGroupController
           Method = ****.MyGroupController#createGroup(GroupCreateRequestDto)

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = org.springframework.http.converter.HttpMessageNotReadableException

ModelAndView:
        View name = null
             View = null
            Model = null

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 500
    Error message = null
          Headers = [Content-Type:"application/json"]
     Content type = application/json
             Body = {"code":500,"reason":"JSON parse error: Unrecognized token 'org': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')"}
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

BRW 我在

objectMapper.writeValueAsString(groupCreateDto)

 生成的字符串中没有 org
有什么想法吗？

Answer 1

问题是由 Kotlin 翻译中的这一行引起的：

content = content().string(objectMapper.writeValueAsString(groupCreateDto)) 应该只是

content = objectMapper.writeValueAsString(groupCreateDto) 后一个代码将反映原始代码中的同一行。另一方面，

content().string...

 构造创建了 

RequestMatcher

，这不是您想要的，因为此时您不在代码的断言部分。