public async Task ProvideDataForObservers()
{
var inputImage = new Image <Rgb, byte>(1, 1);
var expectedImages = new List <Image <Rgb, byte> >();
var i = 0;
strategy.Setup(s => s.Denoise(inputImage)).Returns(() =>
{
var value = new Image <Rgb, byte>(++i, 1);
expectedImages.Add(value);
return(value);
});
var denoiser = new DenoisingStream(strategy.Object, new Counter(), CancellationToken.None, logger.Object);
var observer = new TestImageObserver <Rgb>();
using (denoiser.Subscribe(observer))
{
denoiser.Process(inputImage);
await Task.Delay(TimeSpan.FromMilliseconds(100));
denoiser.Process(inputImage);
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.Equal(2, observer.ReceivedItems.Count);
Assert.Equal(expectedImages[0], observer.ReceivedItems.Keys.First());
Assert.Equal(expectedImages[1], observer.ReceivedItems.Keys.Skip(1).First());
}
public async Task DropNewFramesIfPreviousOneIsStillInProgress()
{
var inputImage = new Image <Rgb, byte>(1, 1);
var expectedImage = new Image <Rgb, byte>(10, 10);
strategy.Setup(s => s.Denoise(inputImage)).Returns(() => {
Task.Delay(TimeSpan.FromMilliseconds(900)).Wait();
return(expectedImage);
});
var denoiser = new DenoisingStream(strategy.Object, new Counter(), CancellationToken.None, logger.Object);
var observer = new TestImageObserver <Rgb>();
using (denoiser.Subscribe(observer))
{
var _ = Task.Run(() => denoiser.Process(inputImage));
_ = Task.Run(() => denoiser.Process(inputImage));
_ = Task.Run(() => denoiser.Process(inputImage));
_ = Task.Run(() => denoiser.Process(inputImage));
await Task.Delay(TimeSpan.FromMilliseconds(1300));
}
Assert.Single(observer.ReceivedItems);
}
public async Task CompletesStreamOnError()
{
videoMock.Setup(v => v.QueryFrame()).Throws <TestException>();
var observer = new TestImageObserver <Rgb>();
using (new CameraStream(videoMock.Object, CancellationToken.None, loggerMock.Object,
TimeSpan.FromMilliseconds(10)).Subscribe(observer))
{
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.True(observer.StreamCompleted);
}
public async Task CompleteStreamOnReset()
{
var observer = new TestImageObserver <TOut>();
using (stage.Output.Subscribe(observer))
{
await Task.Run(() => stage.Reset());
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.True(observer.StreamCompleted);
}
public async Task CompleteStreamWhenRequested()
{
var denoiser = new DenoisingStream(strategy.Object, new Counter(), CancellationToken.None, logger.Object);
var observer = new TestImageObserver <Rgb>();
using (denoiser.Subscribe(observer))
{
denoiser.Complete();
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.True(observer.StreamCompleted);
}
public async Task ForwardErrors()
{
var observer = new TestImageObserver <TOut>();
using (stage.Output.Subscribe(observer))
{
await Task.Run(() => stage.OnError(new TestException()));
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.IsType <TestException>(observer.Error);
}
public async Task NotifyObserversAboutErrors()
{
videoMock.Setup(v => v.QueryFrame()).Throws <TestException>();
var observer = new TestImageObserver <Rgb>();
using (new CameraStream(videoMock.Object, CancellationToken.None, loggerMock.Object,
TimeSpan.FromMilliseconds(10)).Subscribe(observer))
{
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.NotNull(observer.Error);
Assert.IsType <TestException>(observer.Error);
}
public async Task NotProvideDataForUnsubscribedObservers()
{
videoMock.Setup(v => v.QueryFrame()).Returns(() => new Image <Rgb, byte>(100, 100).Mat);
var camera = new CameraStream(videoMock.Object, CancellationToken.None, loggerMock.Object,
TimeSpan.FromMilliseconds(10));
var observer = new TestImageObserver <Rgb>();
using (camera.Subscribe(observer))
{
await Task.Delay(TimeSpan.FromMilliseconds(1000));
}
var after = DateTime.Now;
Assert.True(observer.ReceivedItems.Count > 0);
Assert.DoesNotContain(observer.ReceivedItems, x => x.Value >= after);
}
public async Task CompleteStreamIfErrorOccurred()
{
var inputImage = new Image <Rgb, byte>(1, 1);
strategy.Setup(s => s.Denoise(inputImage)).Throws <TestException>();
var denoiser = new DenoisingStream(strategy.Object, new Counter(), CancellationToken.None, logger.Object);
var observer = new TestImageObserver <Rgb>();
using (denoiser.Subscribe(observer))
{
denoiser.Process(inputImage);
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.IsType <TestException>(observer.Error);
Assert.True(observer.StreamCompleted);
}
public async Task StopAutomaticallyIfVideoStreamFails()
{
var captureMock = new Mock <VideoCapture>(MockBehavior.Default, 0, VideoCapture.API.Any);
captureMock.Setup(c => c.QueryFrame()).Throws <TestException>();
var camera = new Camera(cameraLogger.Object, streamLogger.Object, CaptureSettings.Default, _ => captureMock.Object);
var observer = new TestImageObserver <Rgb>();
camera.Start();
using (camera.Stream.Subscribe(observer))
{
await Task.Delay(TimeSpan.FromMilliseconds(500));
}
Assert.IsType <TestException>(observer.Error);
Assert.False(camera.IsRunning);
}
public async Task DropNewFramesIfSubtractorIsPreviousIsStillInProgress()
{
SetupLongRunningPayload(TimeSpan.FromMilliseconds(200));
var observer = new TestImageObserver <TOut>();
using (stage.Output.Subscribe(observer))
{
var _ = Task.Run(() => stage.OnNext(new Image <TIn, byte>(1, 1)));
_ = Task.Run(() => stage.OnNext(new Image <TIn, byte>(1, 1)));
_ = Task.Run(() => stage.OnNext(new Image <TIn, byte>(1, 1)));
await Task.Delay(TimeSpan.FromMilliseconds(300));
}
Assert.Single(observer.ReceivedItems);
Assert.Equal((ulong)1, stage.Statistics.ProcessedFrames);
Assert.Equal((ulong)2, stage.Statistics.DroppedFrames);
}
public async Task NotProvideDataForObserversAfterCompletion()
{
var inputImage = new Image <Rgb, byte>(1, 1);
var expectedImage = new Image <Rgb, byte>(10, 10);
strategy.Setup(s => s.Denoise(inputImage)).Returns(expectedImage);
var denoiser = new DenoisingStream(strategy.Object, new Counter(), CancellationToken.None, logger.Object);
var observer = new TestImageObserver <Rgb>();
using (denoiser.Subscribe(observer))
{
denoiser.Complete();
denoiser.Process(inputImage);
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
Assert.Empty(observer.ReceivedItems);
}
public void CompleteStreamWhenStopped()
{
var camera = new Camera(cameraLogger.Object, streamLogger.Object, CaptureSettings.Default, Camera.CreateVideoCapture);
var logger = new PropertyChangedLogger();
var observer = new TestImageObserver <Rgb>();
camera.PropertyChanged += logger.OnPropertyChanged;
camera.Start();
using (camera.Stream.Subscribe(observer))
{
camera.Stop();
}
Assert.Null(camera.Stream);
Assert.Equal(2, logger.Notifications[camera].Count(x => x.Value == nameof(Camera.Stream)));
Assert.True(observer.StreamCompleted);
}
public async Task CompleteTheStreamIfCancellationRequested()
{
videoMock.Setup(v => v.QueryFrame()).Returns(() => new Image <Rgb, byte>(100, 100).Mat);
var cts = new CancellationTokenSource();
var camera = new CameraStream(videoMock.Object, cts.Token, loggerMock.Object,
TimeSpan.FromMilliseconds(10));
var observer = new TestImageObserver <Rgb>();
camera.Subscribe(observer);
// ReSharper disable MethodSupportsCancellation
await Task.Delay(TimeSpan.FromMilliseconds(500));
cts.Cancel();
await Task.Delay(TimeSpan.FromMilliseconds(500));
// ReSharper restore MethodSupportsCancellation
Assert.True(observer.StreamCompleted);
}
public async Task NotSendNewFramesIfCancellationRequested()
{
videoMock.Setup(v => v.QueryFrame()).Returns(() => new Image <Rgb, byte>(100, 100).Mat);
var cts = new CancellationTokenSource();
var camera = new CameraStream(videoMock.Object, cts.Token, loggerMock.Object,
TimeSpan.FromMilliseconds(10));
var observer = new TestImageObserver <Rgb>();
camera.Subscribe(observer);
// ReSharper disable MethodSupportsCancellation
await Task.Delay(TimeSpan.FromMilliseconds(500));
cts.Cancel();
var after = DateTime.Now;
await Task.Delay(TimeSpan.FromMilliseconds(500));
// ReSharper restore MethodSupportsCancellation
Assert.DoesNotContain(observer.ReceivedItems, x => x.Value > after);
}
//TODO: redesign blinking test
public async Task UseProvidedSettingsToSetFrameInterval()
{
var settings = new CaptureSettings("Some source", TimeSpan.FromMilliseconds(50));
var captureMock = new Mock <VideoCapture>(MockBehavior.Default, 0, VideoCapture.API.Any);
captureMock.Setup(c => c.QueryFrame()).Returns(() => new Image <Rgb, byte>(100, 100).Mat);
var camera = new Camera(cameraLogger.Object, streamLogger.Object, CaptureSettings.Default, _ => captureMock.Object);
var observer = new TestImageObserver <Rgb>();
camera.Settings = settings;
camera.Start();
using (camera.Stream.Subscribe(observer))
{
await Task.Delay(TimeSpan.FromMilliseconds(500));
camera.Stop();
}
Assert.True(11 >= observer.ReceivedItems.Count);
Assert.True(9 <= observer.ReceivedItems.Count);
}