ReactiveTest：测试observable的超时

Question

我试图使用Microsoft.Reactive.Testing.ReactiveTest来测试应该抛出超时异常的observable。

我无法找到让超时出现的方法。测试始终以空res.Messages

结束

以下是测试中的代码：

public class DeviceHandler : IDeviceHandler
{
    public readonly TimeSpan DISCOVER_SERVICE_TIMEOUT = TimeSpan.FromSeconds(10);    
    public IObservable<IGattService> DiscoverService(IDevice device)
    {
        return device
                 .GetKnownService(SERVICE_UUID)
                 .Timeout(DISCOVER_SERVICE_TIMEOUT);
    }
}

这是测试代码：

public class DeviceHandlerTest : ReactiveTest
{
    private DeviceHandler deviceHandler;

    private TestScheduler scheduler;

    [TestInitialize]
    public void SetUp()
    {
        deviceHandler = new DeviceHandler();
        scheduler = new TestScheduler();
    }


    [TestMethod]
    public void ShouldErrorIfNoServiceFound()
    {
        // GIVEN
        var mockDevice = new Mock<IDevice>();
        var mockService = new Mock<IGattService>();


        var mockServiceObservable = scheduler.CreateColdObservable(new Recorded<Notification<IGattService>>[]{
        });
        mockDevice.Setup(device => device.GetKnownService(deviceHandler.SERVICE_UUID))
            .Returns(mockServiceObservable);

        // WHEN
        var res = scheduler.Start(() => deviceHandler.DiscoverService(mockDevice.Object));
        scheduler.Sleep(20000); // I expect this to enable the timeout to trigger

        // THEN
        Assert.IsTrue(Enumerable.SequenceEqual(res.Messages, new Recorded<Notification<IGattService>>[] {
            OnError<IGattService>(100, new TimeoutException())
        }, new RecordedComparer<IGattService>()));
}

当我拨打scheduler.Sleep(20000)（20秒，超过10秒超时）时，我希望触发超时。

我做错了什么？

由于