spring mockMVC testing method GET

Question

i created post method in mockMVC (in spring boot project) This is my method testing

This is my method testing

@Test
public void createAccount() throws Exception {
     AccountDTO accountDTO = new AccountDTO("SAVINGS", "SAVINGS");
     when(addaccountService.findByName("SAVING")).thenReturn(Optional.empty());
     when(addaccountService.createAccount(any())).thenReturn(createdAccountDTO);
    CreatedAccountDTO createdAccountDTO = new CreatedAccountDTO("[email protected]", "SAVINGS", "1234rds", uuid);

    mockMvc.perform(
             post("/account").contentType(MediaType.APPLICATION_JSON)
              .content(asJsonString(AccountNewDTO)))
            .andExpect(status().isCreated())
            .andExpect(header().string("location", containsString("/account/"+uuid.toString())));
    System.out.println("aaa");
}

I want to write GET method.

how to write a get method in mock mvc? how to verify whether what I threw was returned?

Answer 1

You can try the below for Mockmvc perform get and post methods
For get method

@Autowired
private MuffinRepository muffinRepository;

@Test
public void testgetMethod throws Exception(){
    Muffin muffin = new Muffin("Butterscotch");
    muffin.setId(1L);
    
    BddMockito.given(muffinRepository.findOne(1L)).
        willReturn(muffin);
        
    mockMvc.perform(MockMvcRequestBuilders.
        get("/muffins/1")).
        andExpect(MockMvcResultMatchers.status().isOk()).
        andExpect(MockMvcResultMatchers.content().string("{\"id\":1, \"flavor\":\"Butterscotch\"}"));   
}

//Test to do post operation
@Test
public void testgetMethod throws Exception(){
    Muffin muffin = new Muffin("Butterscotch");
    muffin.setId(1L);
    
    BddMockito.given(muffinRepository.findOne(1L)).
        willReturn(muffin);
        
    mockMvc.perform(MockMvcRequestBuilders.
        post("/muffins")
        .content(convertObjectToJsonString(muffin))
        .contentType(MediaType.APPLICATION_JSON)
        .accept(MediaType.APPLICATION_JSON))
        .andExpect(MockMvcResultMatchers.status().isCreated())
        .andExpect(MockMvcResultMatchers.content().json(convertObjectToJsonString(muffin)));    
}

If the response is empty then make sure to override equals() and hashCode() method on the Entity your repository is working with

//Converts Object to Json String
private String convertObjectToJsonString(Muffin muffin) throws JsonProcessingException{
    ObjectWriter writer = new ObjectWriter().writer().withDefaultPrettyPrinter();
    return writer.writeValueAsString(muffin);
}

Answer 2

You can use the static get method of the class MockMvcRequestBuilders, see: https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/test/web/servlet/request/MockMvcRequestBuilders.html#get-java.lang.String-java.lang.Object...-

Example:

mockMvc.perform(get("/account")).andExpect(...);

If you throw an exception within your controller method it will typically trigger execution of an exception handler which transforms the exception into a HTTP error response. By default, you could check if the status of the response was 500. If you have implemented your own exception handler you may want to check the response body as well to verify if it contains the expected error data.