Question

我对ReactiveTest的使用感到有点困惑：https://msdn.microsoft.com/en-us/library/hh242967%28v=vs.103%29.aspx

我在类DeviceService中有一个方法ScanDevices，我想用ReactiveTest功能进行测试。该方法从bleAdapter.Scan()获取IObservable。

我想模仿这个bleAdapter.Scan（），对ScanDevices()的行为进行单元测试。我尝试用Moq模拟bleAdapter.Scan（）。

 //interface to mock
 public interface IAdapter {
        IObservable<IScanResult> Scan(ScanConfig config = null);
 }

 //class to test
 class DeviceService {
        public IObservable<DeviceModel> ScanDevices()
        {
            return bleAdapter.Scan() // this returns an IObservable
                .Where(IsMatching)
                .Distinct(DistinctByUuid)
                .Select(ToDeviceModel);
        }
}

这是我的单元测试：

       public class DeviceServiceTest: ReactiveTest {
            [TestMethod]
            public void ShouldReceiveOneDevice()
            {
                var mockBleAdapter = new Mock<IAdapter>();
                var deviceInteractionService = new DeviceInteractionService(mockBleAdapter.Object);

                var scheduler = new TestScheduler();
                var obs = scheduler.CreateColdObservable(OnNext(100, new MockScannedDevice())); // create an observable that will emit one value


                mockBleAdapter.Setup(adapter => adapter.Scan(null))
                    .Returns(obs); // use Moq framework to return the observable created

                scheduler.Start();

                deviceInteractionService.ScanDevices()
                        .Subscribe(res => Console.WriteLine("hello"));
            }
   }

＆＃34;你好＆＃34;永远不会打印。我做错了...... 你有什么好办法吗？

由于

Answer 1

唉......问题是你需要在致电scheduler.Start()

之前设置订阅

所以，要打印你好的问候，这里是：

 public class DeviceServiceTest: ReactiveTest {
            [TestMethod]
            public void ShouldReceiveOneDevice()
            {
                var mockBleAdapter = new Mock<IAdapter>();
                var deviceInteractionService = new DeviceInteractionService(mockBleAdapter.Object);

                var scheduler = new TestScheduler();
                var obs = scheduler.CreateColdObservable(OnNext(100, new MockScannedDevice())); // create an observable that will emit one value


                mockBleAdapter.Setup(adapter => adapter.Scan(null))
                    .Returns(obs); // use Moq framework to return the observable created

                // subscribe
                deviceInteractionService.ScanDevices()
                        .Subscribe(res => Console.WriteLine("hello"));

                // then start
                scheduler.Start();

            }
   }

ReactiveTest用于模拟可观察对象

1 个答案: