How to POST Multipart Form Data in Mock MVC of Spring MVC

I am currently working on the unit testing of my controller, the content type should be Multipart_Form_Data. However when I am trying to run it, the body that it is returning is empty.

mockMvc.perform(post(path)
        .content(objectMapper.writeValueAsString(request))
        .servletPath(path)
        .headers(headers)
        .contentType(MediaType.MULTIPART_FORM_DATA)
        .accept(MediaType.MULTIPART_FORM_DATA))
        .andExpect(status().isBadRequest())
        .andDo(print())
        .andReturn();

Response:

MockHttpServletResponse:
       Status = 400
Error message = null
      Headers = []
 Content type = null
         Body = 
Forwarded URL = null

Redirected URL = null Cookies = []