Mock MVC - Add Request Parameter to test

Question

I am using spring 3 2 mock mvc to test my controller My code is    Autowired      private Client client         RequestMapping value     user   method   RequestMethod GET          public String initUserSearchForm ModelMap modelMap                User user   new User                modelMap addAttribute  User   user               return  user                       RequestMapping value     byName   method   RequestMethod GET           ResponseStatus HttpStatus OK          public          ResponseBody         String getUserByName              RequestParam  firstName   String firstName              RequestParam  lastName   String lastName              ModelAttribute  userClientObject   UserClient userClient                return client getUserByName userClient  firstName  lastName               and I wrote following test    Test public void testGetUserByName   throws Exception           String firstName    Jack           String lastName    s                  this userClientObject   client createClient            mockMvc perform get   byName                    sessionAttr  userClientObject   this userClientObject                   param  firstName   firstName                   param  lastName   lastName                           andExpect status   isOk                     andExpect content   contentType  application json                     andExpect jsonPath    0  id   exists                     andExpect jsonPath    0  fn   value  Marge         what i get is   java lang AssertionError  Status expected  lt 200 gt  but was  lt 400 gt      at org springframework test util AssertionErrors fail AssertionErrors java 60      at org springframework test util AssertionErrors assertEquals AssertionErrors java 89      at org springframework test web servlet result StatusResultMatchers 5 match StatusResultMatchers java 546      at org springframework test web servlet MockMvc 1 andExpect MockMvc java 141    Why this happens  Is it right way to pass the  RequestParam

User · Accepted Answer

When i analyzed your code  I have also faced the same problem but my problem is if i give value for both first and last name means it is working fine  but when i give only one value means it says 400  anyway use the  andDo print    method to find out the error  public void testGetUserByName   throws Exception       String firstName    Jack       String lastName    s              this userClientObject   client createClient        mockMvc perform get   byName                sessionAttr  userClientObject   this userClientObject               param  firstName   firstName               param  lastName   lastName                       andDo print          andExpect status   isOk                 andExpect content   contentType  application json                 andExpect jsonPath    0  id   exists                 andExpect jsonPath    0  fn   value  Marge         If your problem is org springframework web bind missingservletrequestparameterexception you have to change your code to    RequestMapping value     byName   method   RequestMethod GET       ResponseStatus HttpStatus OK      public      ResponseBody     String getUserByName           RequestParam  value  firstName  required   false  String firstName           RequestParam value  lastName  required   false  String lastName            ModelAttribute  userClientObject   UserClient userClient                 return client getUserByName userClient  firstName  lastName

User · Answer

ModelAttribute is a Spring mapping of request parameters to a particular object type   so your parameters might look like userClient username and userClient firstName  etc   as MockMvc imitates a request from a browser  you ll need to pass in the parameters that Spring would use from a form to actually build the UserClient object    i think of ModelAttribute is kind of helper to construct an object from a bunch of fields that are going to come in from a form  but you may want to do some reading to get a better definition

User · Answer

If anyone came to this question looking for ways to add multiple parameters at the same time  my case   you can use  params with a MultivalueMap instead of adding each  param    LinkedMultiValueMap lt String  String gt  requestParams   new LinkedMultiValueMap lt  gt    requestParams add  id    1    requestParams add  name    john    requestParams add  age    30     mockMvc perform get  my endpoint   params requestParams   andExpect status   isOk

[spring] Mock MVC - Add Request Parameter to test

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