PN-2510

{
  ResultActions result = mockMvc.perform(post(USERS)
      .contentType(APPLICATION_JSON_UTF8)
      .content(toJson(new UserRequest("user")))
      .accept(APPLICATION_JSON)
  );

  result.andExpect(status().isCreated())
        .andExpect(content().contentType(APPLICATION_JSON_UTF8));

  // One way:
  result
      .andExpect(jsonPath("$.id", notNullValue()))
      .andExpect(jsonPath("$.name", is("user")));

  // Another:
  var expected = new UserResponse("user");		
  assertBody(result, expected, "id") // ignore 'id' field
      .satisfies(body -> assertThat(body.getId()).isNotNull());
}


// Helpers

private <T> ObjectAssert<T> assertBody(ResultActions result, T expected, String... ignoredFields) throws Exception {
    String body = result.andReturn().getResponse().getContentAsString();
    //noinspection unchecked
    return (ObjectAssert<T>) assertThat(objectMapper.readValue(body, expected.getClass())).isEqualToIgnoringGivenFields(expected, ignoredFields);
}

private String toJson(Object object) throws JsonProcessingException {
    return objectMapper.writeValueAsString(object);
}

e.g. for json path: https://github.com/json-path/JsonPath