Spring Test : JUnit 5 Mockito Unit Test

1.  JUnit 5가 되면 @RunWith 대신 @ExtendWith를 가지고 특정 기능만 활성화하여 테스트 할 수 있다.

 

2. Controller 테스트 방법은 MockMvc을 사용하면 좀 더 편리하다.

  2-0 Mock fixture의 초기화는 MockitoAnnotations.initMocks(this), @ExtendWith 둘 중 하나를 쓸 수 있다.

    2-0-1 아래는 initMocks을 사용하였다. @ExtendWith를 사용하면 자동으로 initMocks 호출을 포함한다.

  2-1 물론 MockMvc를 사용하지 않고도 테스트는 가능하다.

  2-2 MockMvc를 사용하게 되면 특정 url의 호출을 시뮬레이션할 수 있고 결과를 한번에 체크 가능하다.

  2-3 아래의 listOwners 메소드는 MockMvc없이 작성한 테스트 코드이다.

  2-4 listOwnersWithMock, listOwnersWithMockByIndex, findOwner는 MockMvc를 사용한 코드이다.

  2-5 findOwner의 verifyNoInteractions는 예전의 verifyZeroInteractions을 대체하는 메소드이다.

 

package pe.pilseong.petclinic.controller;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoInteractions;
import static org.mockito.Mockito.when;

import java.util.HashSet;
import java.util.Set;

import org.hamcrest.Matchers;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.ui.Model;

import pe.pilseong.petclinic.domain.Owner;
import pe.pilseong.petclinic.service.OwnerService;

// @ExtendWith(MockitoExtension.class)
public class OwnerControllerTest {

  @InjectMocks
  OwnerController ownerController;

  @Mock
  OwnerService ownerService;

  @Mock
  Model model;

  MockMvc mockMvc;

  Owner owner;
  Set<Owner> returnOwners ;
  

  @BeforeEach
  public void setup() {

    MockitoAnnotations.initMocks(this);

    returnOwners = new HashSet<>();
    returnOwners.add(Owner.builder().id(1L).lastName("Heo").build());
    returnOwners.add(Owner.builder().id(2L).lastName("Choi").build());

    owner = Owner.builder().id(1L).lastName("Heo").build();

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

  @Test
  void listOwners() {

    when(ownerService.findAll()).thenReturn(returnOwners);

    String viewName = ownerController.listOwners(model);

    assertEquals("owners/index", viewName);

    verify(model).addAttribute(anyString(), any());
  }

  @Test
  void listOwnersWithMock() throws Exception {

    when(ownerService.findAll()).thenReturn(returnOwners);

    mockMvc.perform(MockMvcRequestBuilders.get("/owners"))
      .andExpect(MockMvcResultMatchers.status().isOk())
      .andExpect(MockMvcResultMatchers.view().name("owners/index"))
      .andExpect(MockMvcResultMatchers.model().attribute("owners", Matchers.hasSize(2)));

  }

  @Test
  void listOwnersWithMockByIndex() throws Exception {

    when(ownerService.findAll()).thenReturn(returnOwners);

    mockMvc.perform(MockMvcRequestBuilders.get("/owners/index"))
      .andExpect(MockMvcResultMatchers.status().isOk())
      .andExpect(MockMvcResultMatchers.view().name("owners/index"))
      .andExpect(MockMvcResultMatchers.model().attribute("owners", Matchers.hasSize(2)));

  }

  @Test
  void findOwner() throws Exception {
    mockMvc.perform(MockMvcRequestBuilders.get("/owners/find"))
      .andExpect(MockMvcResultMatchers.status().isOk())
      .andExpect(MockMvcResultMatchers.view().name("notimplemented"));

      verifyNoInteractions(ownerService);
  }

  @Test
  public void test() {

  }
}