public async Task <Option <ISavedImage> > Dequeue()
{
Option <ISavedImage> dequeueImage = await _imageQueue.Dequeue();
dequeueImage.MatchSome(_ => _queueChanges.OnNext(new ImageQueueChangedEvent()));
return(dequeueImage);
}
public void Dequeue_ImageWasDequeuedFromInnerQueue_ImageQueueChangesEventFired()
{
Option <ISavedImage> expectedDequeuedImage = A.Dummy <ISavedImage>().Some();
A.CallTo(() => _innerQueue.Dequeue()).Returns(expectedDequeuedImage);
Option <ISavedImage> dequeuedImage = Option.None <ISavedImage>();
_testScheduler.ScheduleAsync(TimeSpan.FromTicks(5), async(s, t) =>
{
dequeuedImage = await _sut.Dequeue();
});
ITestableObserver <ImageQueueChangedEvent> imageQueueChanges = _testScheduler.Start(() => _sut.ImageQueueChanges, 0, 0, 100);
imageQueueChanges.Messages.Should().HaveCount(1);
dequeuedImage.HasValue.Should().BeTrue();
dequeuedImage.Should().Be(expectedDequeuedImage);
}