java - 如何在 Controller 测试中注入(inject)依赖项？

Question

这是我的类及其构造函数和依赖项。

public class FavouriteProfilesController extends BaseController implements CurrentUser, JsonHelper {

    private final UserProvider userProvider;
    private MessagesApi msg;

    @javax.inject.Inject
    public FavouriteProfilesController(
            UserProvider userProvider,
            MessagesApi msgApi) {
        this.userProvider = userProvider;
        this.msg = msgApi;
    } 
    // methods etc... 

这是我刚刚从文档复制的测试代码:

public class FavouriteProfilesControllerTest extends WithApplication {

   @Override
   protected Application provideApplication() {
      return new GuiceApplicationBuilder()
              .configure("play.http.router", "javaguide.tests.Routes")
              .build();
   }

   @Test
   public void testIndex() {
      Result result = new FavouriteProfilesController().index(); // Inject dependencies here
      assertEquals(OK, result.status());
      assertEquals("text/html", result.contentType().get());
      assertEquals("utf-8", result.charset().get());
      assertTrue(contentAsString(result).contains("Welcome"));
   }


}

Controller 有 2 个依赖项，UserProvider 和 MessagesApi，如何将它们注入(inject)/模拟到 Controller 测试中？

Answer 1

如果你使用 Mockito，你可以像这样模拟它们:

@RunWith(MockitoJUnitRunner.class)
public class FavouriteProfilesControllerTest extends WithApplication {

   @InjectMocks
   private FavouriteProfilesController controller;

   @Mock
   private UserProvider userProvider;

   @Mock
   private MessagesApi msg;

   @Test
   public void test() {
     Assert.assertNotNull(userProvider);
     Assert.asserNotNull(msg);
   }
}