public async Task StopAsync_GivenTask_ThenTaskCanceled()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
var tcs = new TaskCompletionSource <int>();
var delay = TimeSpan.FromMilliseconds(100);
var stopwatch = Stopwatch.StartNew();
var delayTask = queue.Enqueue(async token =>
{
tcs.SetResult(0);
await Task.Delay(delay, token).ConfigureAwait(false);
return(stopwatch.Elapsed);
});
// make sure the delay task has started
await tcs.Task.ConfigureAwait(false);
var stopTask = queue.StopAsync();
await Assert.ThrowsAsync <TaskCanceledException>(async() =>
await Task.WhenAll(delayTask, stopTask).ConfigureAwait(false)
).ConfigureAwait(false);
// the stop task should have ran to completion
await stopTask.ConfigureAwait(false);
}
public async Task Enqueue_GivenStop_ThenDisposed()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
await queue.StopAsync().ConfigureAwait(false);
await Assert.ThrowsAsync <InvalidOperationException>(async() =>
await queue.Enqueue(token => Task.FromResult(1)).ConfigureAwait(false)
).ConfigureAwait(false);
}
public async Task StopAsync_GivenNoTasks_ThenStopsImmediately()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
var stopwatch = Stopwatch.StartNew();
await queue.StopAsync().ConfigureAwait(false);
var elapsed = stopwatch.Elapsed;
Assert.InRange(elapsed.TotalMilliseconds, 0, 25);
}
public async Task Enqueue_GivenException_ThenException()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
await Assert.ThrowsAsync <ApplicationException>(async() =>
await queue.Enqueue <int>(token => throw new ApplicationException()).ConfigureAwait(false)
).ConfigureAwait(false);
// cleanup
await queue.StopAsync().ConfigureAwait(false);
}
public async Task Enqueue_GivenResult_ThenIsValid()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
var result = await queue.Enqueue(token => Task.FromResult(1)).ConfigureAwait(false);
Assert.Equal(1, result);
// cleanup
await queue.StopAsync().ConfigureAwait(false);
}
public async Task StopAsync_GivenCancelledToken_ThenTaskCanceled()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
var tcs = new TaskCompletionSource <int>();
var delay = queue.Enqueue(token => tcs.Task);
var cancellationToken = new CancellationToken(true);
await Assert.ThrowsAsync <TaskCanceledException>(async() =>
await queue.StopAsync(cancellationToken).ConfigureAwait(false)
).ConfigureAwait(false);
tcs.SetResult(0);
await delay.ConfigureAwait(false);
}
public async Task Enqueue_GivenDelay_ThenIsValid()
{
var options = new BackgroundQueueOptions();
var queue = new BackgroundQueue(options);
var delay = TimeSpan.FromMilliseconds(100);
var stopwatch = Stopwatch.StartNew();
var elapsed = await queue.Enqueue(async token =>
{
await Task.Delay(delay, token).ConfigureAwait(false);
return(stopwatch.Elapsed);
}).ConfigureAwait(false);
var delta = elapsed - delay;
Assert.InRange(delta.TotalMilliseconds, 0, 25);
// cleanup
await queue.StopAsync().ConfigureAwait(false);
}
public async Task StopAsync_GivenShutdownTimeout_ThenTaskCanceled()
{
var options = new BackgroundQueueOptions
{
ShutdownTimeout = TimeSpan.FromMilliseconds(50)
};
var queue = new BackgroundQueue(options);
var tcs = new TaskCompletionSource <int>();
var delay = queue.Enqueue(token => tcs.Task);
var stopwatch = Stopwatch.StartNew();
await Assert.ThrowsAsync <TaskCanceledException>(async() =>
await queue.StopAsync(CancellationToken.None).ConfigureAwait(false)
).ConfigureAwait(false);
var elapsed = stopwatch.Elapsed;
Assert.InRange(elapsed.TotalMilliseconds, 50, 100);
tcs.SetResult(0);
await delay.ConfigureAwait(false);
}