无法使用MockRetrofit测试异步Retrofit2 API调用

Question

我正在尝试使用MockRetrofit测试retrofit2应用程序接口。我有以下服务API：

  interface AuthApi
  {
      public Call<Result> signin( String username, String pswd );
  }

Mock实现如下所示：

    public class MockAuthService implements AuthApi
    {
         BehaviorDelegate<AuthService> delegate;
         public MockAuthService( BehaviorDelegate<AuthService> d )
         {
             delegate = d;
         } 

         public Call<Result> signin( String username, String pswd )
         {
             return delegate.returningResponse( new Result() ).signin( usernam, pswd );

         }
    }

我的测试如下所示：

@Test
public void testSuccessfulLogin()
{
    // Create MockRetrofit object

    MockAuthService service = new MockAuthService( mockRetrofit.create(AuthService.class) );
    Call<Result> call = service.signin("user", "pswd" );
    call.execute(); //This works fine. I get the result obj and check status code and stuff
    call.enqueue(new Callback<Result>()  // This does not work
    {
        @Override
        public void onResponse( Call<Result> call, Response<SignInResult.Result> response )
        {
            System.out.println( "onResponse" ); // This is never called
        }

        @Override
        public void onFailure( Call<Result> call, Throwable throwable )
        {
            System.out.println( "onFailure" ); // this is never called
        }
    } );
}

单元测试的异步部分(call.enqueue())不起作用。回调(onResponse或onFailure)永远不会被调用。同步调用工作正常。知道为什么只有异步调用不起作用吗？

Answer 1

问题是我没有等待后台线程调用回调方法。一旦我在调用enqueue之后放入一个Thread.sleep(1000)，它就开始正常工作了。