关于junit5:Spring-MVC-Rest-Controller-Tests

Using JsonPath in MockMVC Test

BeerController

@RequestMapping("/api/v1/beer")
@RestController
public class BeerController {

    private final BeerService beerService;

    @GetMapping(path = {"/{beerId}"},produces = { "application/json" })
    public ResponseEntity<BeerDto>  getBeerById(@PathVariable("beerId") UUID beerId){

        return new ResponseEntity<>(beerService.findBeerById(beerId), HttpStatus.OK);
    }
}

BeerControllerTest

import static org.hamcrest.core.Is.is;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.BDDMockito.given;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

@ExtendWith(MockitoExtension.class)
class BeerControllerTest {

    @Mock
    BeerService beerService;

    @InjectMocks
    BeerController beerController;

    MockMvc mockMvc;

    BeerDto validBeer;

    @BeforeEach
    void setUp() {
        validBeer = BeerDto.builder().id(UUID.randomUUID())
                .version(1)
                .beerName("Beer1")
                .beerStyle(BeerStyleEnum.PALE_ALE)
                .price(new BigDecimal("12.99"))
                .quantityOnHand(4)
                .upc(123456789012L)
                .createdDate(OffsetDateTime.now())
                .lastModifiedDate(OffsetDateTime.now())
                .build();

        mockMvc = MockMvcBuilders.standaloneSetup(beerController).build();
    }

    @Test
    void testGetBeerById() throws Exception {
        given(beerService.findBeerById(any())).willReturn(validBeer);

        mockMvc.perform(get("/api/v1/beer/" + validBeer.getId()))
                .andExpect(status().isOk())
                .andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8))
                .andExpect(jsonPath("$.id", is(validBeer.getId().toString())))
                .andExpect(jsonPath("$.beerName", is("Beer1")));

    }
}