How to test GET request with body in Spring RestController? - spring

Question

I have a rest controller like this;
#RestController
#RequiredArgsConstructor
#RequestMapping(PO)
public class PoController {
private final PoService service;
#GetMapping(value = FILTER, produces = APPLICATION_JSON_VALUE)
public ResponseEntity<List<PoDTO>> filter(PoFilterCriteria poFilterCriteria) {
return ok().body(service.getPos(poFilterCriteria));
}
}
And I want to write an unit test for it but I couldn't achieve to mock the service to return list.
This is my poFilterCriteria model;
#Data
public class PoFilterCriteria {
private double hp;
private FilterOperationType hpOperationType;
private double attack;
private FilterOperationType attackOperationType;
private double defense;
private FilterOperationType defenseOperationType;
}
And this is my test;
#WebMvcTest(value = PoController.class)
class PoControllerTest {
#Autowired
private MockMvc mockMvc;
#MockBean
private PoService service;
private PoDTO poDTO;
private List<PoDTO> poDTOList;
#BeforeEach
void setUp() {
poDTOList = new ArrayList<>();
poDTO = new Po();
poDTOList.add(poDTO);
}
#Test
public void filter_success() throws Exception {
PoFilterCriteria poFilterCriteria= new PoFilterCriteria ();
poFilterCriteria.setAttack(40);
poFilterCriteria.setAttackOperationType(GT);
poFilterCriteria.setHp(49);
poFilterCriteria.setHpOperationType(EQ);
poFilterCriteria.setDefense(60);
poFilterCriteria.setDefenseOperationType(LT);
when(service.getPos(poFilterCriteria)).thenReturn(poDTOList);
mockMvc.perform(get(PO + FILTER)
.param("hp", String.valueOf(40))
.param("hpOperationType", String.valueOf(GT))
.param("attack", String.valueOf(49))
.param("attackOperationType", String.valueOf(EQ))
.param("defense", String.valueOf(60))
.param("defenseOperationType", String.valueOf(LT))
.contentType(APPLICATION_JSON))
.andExpect(status().isOk())
.andExpect(content().json(new ObjectMapper().writeValueAsString(poDTOList)));
}
}
But the list that should return with size of 1 is returning empty.
What did I do wrong?

Answer 1

org.mockito.ArgumentMatchers#any(java.lang.Class)
when(service.getPos(any(PoFilterCriteria.class))).thenReturn(poDTOList);
or
org.mockito.ArgumentMatchers#same
when(service.getPos(same(poFilterCriteria))).thenReturn(poDTOList);