try {
Map<String, Integer> map = new HashMap<String, Integer>();
map.put("mapKey", 1);
ObjectMapper mapper = new ObjectMapper();
mockMvc.perform(post("/users/map")
.body(mapper.writeValueAsBytes(map))
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON))
.andDo(print())
.andExpect(status().isOk());