Check if object exists in array MockMvcResultMatchers

Question

I'm writing tests using MockMvc in Spring. So I want to check if my response contains element I'm saving to repository, like so:

    @Test
    void getScreeningsShouldReturn200() throws Exception {
        //given
        Screening screening = Screening.createScreeningWithRoom(Movie.createMovieWithTitle("Interstellar"), ZonedDateTime.now().plusMinutes(240), Room.createRoom());
        screeningRepository.save(screening);

        List<Screening> screeningList = new ArrayList<>();
        screeningList.add(screening);

        System.out.println(mapper.writer().writeValueAsString(screening));

        //TODO check below value if contains certain data
        //when
        mvc.perform(MockMvcRequestBuilders.get(url).contentType(MediaType.APPLICATION_JSON))
                //then
                .andExpect(status().isOk())
                .andExpect(MockMvcResultMatchers.content().string(mapper.writer().writeValueAsString(screeningList)))
                .andReturn();
    }

This way it works, but what if there would me many objects that I got from response, how would I find if this one exists inside array of many?

Thanks!

Answer 1

Use this code :

.andExpect(jsonPath("$.rootObjectName.listName[0].fieldName").exists())

And as a personal advice, do two tests :

1. should_return_ok : .andExpect(status().isOk())
2. should_return_correct_data : .andExpect(jsonPath("$.rootObjectName.listName[0].fieldName").value(<yourValue>))

• if you don't use result of .andReturn(); do implement it