如何用mockMvc检查响应体中的字符串

Question

我有简单的集成测试

@Test
public void shouldReturnErrorMessageToAdminWhenCreatingUserWithUsedUserName() throws Exception {
    mockMvc.perform(post("/api/users").header("Authorization", base64ForTestUser).contentType(MediaType.APPLICATION_JSON)
        .content("{\"userName\":\"testUserDetails\",\"firstName\":\"xxx\",\"lastName\":\"xxx\",\"password\":\"xxx\"}"))
        .andDo(print())
        .andExpect(status().isBadRequest())
        .andExpect(?);
}

在最后一行中，我想比较响应体中接收到的字符串和预期的字符串

我得到的答复是：

MockHttpServletResponse:
          Status = 400
   Error message = null
         Headers = {Content-Type=[application/json]}
    Content type = application/json
            Body = "Username already taken"
   Forwarded URL = null
  Redirected URL = null

尝试了content()、body()的一些技巧，但没有效果。

Answer 1

@Sotirios Delimanolis答案完成该工作，但是我正在这个mockMvc断言中查找比较字符串

所以它在这里

.andExpect(content().string("\"Username already taken - please try with different username\""));

我断言当然失败了：

java.lang.AssertionError: Response content expected:
<"Username already taken - please try with different username"> but was:<"Something gone wrong">

因为：

  MockHttpServletResponse:
            Body = "Something gone wrong"

所以这就是它工作的证明！

Answer 2

您可以调用andreturn()并使用返回的MVCRESULT对象来获取作为字符串的内容。

见下文：

MvcResult result = mockMvc.perform(post("/api/users").header("Authorization", base64ForTestUser).contentType(MediaType.APPLICATION_JSON)
            .content("{\"userName\":\"testUserDetails\",\"firstName\":\"xxx\",\"lastName\":\"xxx\",\"password\":\"xxx\"}"))
            .andDo(MockMvcResultHandlers.print())
            .andExpect(status().isBadRequest())
            .andReturn();

String content = result.getResponse().getContentAsString();
// do what you will