public void WorksWithReentrancy()
{
for (var i = 0; i < 25; i++)
{
var r = new DiscardRedundantWorkThrottle();
var h = new TaskCompletionSource();
Task t = null;
r.SetNextToAction(() => t = r.SetNextToAsyncFunction(() => h.Task)).AssertRanToCompletion();
t.AssertNotCompleted(timeout: TimeSpan.FromMilliseconds(5));
h.SetRanToCompletion();
t.AssertRanToCompletion();
}
}
public void SourceTransitions()
{
new TaskCompletionSource().Task.AssertNotCompleted();
var cex = new Exception[] { new InvalidEnumArgumentException(), new InvalidProgramException() };
var r1 = new TaskCompletionSource();
r1.SetRanToCompletion();
r1.Task.AssertRanToCompletion();
var r2 = new TaskCompletionSource();
r2.TrySetRanToCompletion().AssertIsTrue();
r2.Task.AssertRanToCompletion();
var r3 = new TaskCompletionSource();
r3.SetCanceled();
r3.Task.AssertCancelled();
var r4 = new TaskCompletionSource();
r4.TrySetCanceled().AssertIsTrue();
r4.Task.AssertCancelled();
var r5 = new TaskCompletionSource();
r5.SetException(new InvalidEnumArgumentException());
r5.Task.AssertFailed <InvalidEnumArgumentException>();
var r6 = new TaskCompletionSource();
r6.SetException(cex);
r6.Task.AssertFailed <AggregateException>().InnerExceptions.AssertSequenceEquals(cex);
var r7 = new TaskCompletionSource();
r7.TrySetException(new InvalidEnumArgumentException()).AssertIsTrue();
r7.Task.AssertFailed <InvalidEnumArgumentException>();
// failed transitions
Util.ExpectException <InvalidOperationException>(r1.SetRanToCompletion);
Util.ExpectException <InvalidOperationException>(r1.SetCanceled);
Util.ExpectException <InvalidOperationException>(() => r1.SetException(new Exception()));
Util.ExpectException <InvalidOperationException>(() => r1.SetException(cex));
r1.TrySetRanToCompletion().AssertIsFalse();
r1.TrySetCanceled().AssertIsFalse();
r1.TrySetException(new Exception()).AssertIsFalse();
r1.TrySetException(cex).AssertIsFalse();
}
public void EventuallySetFromTaskVoid()
{
var r1 = new TaskCompletionSource();
var r2 = new TaskCompletionSource();
var t3 = r1.EventuallySetFromTask(r2.Task);
r1.Task.AssertNotCompleted();
t3.AssertNotCompleted();
r2.SetRanToCompletion();
t3.AssertRanToCompletion();
r1.Task.AssertRanToCompletion();
r1.EventuallySetFromTask(r2.Task).AssertFailed <InvalidOperationException>();
}
public void NoOverlap()
{
var r = new ExclusiveSynchronizationContext();
var n = 0;
for (var i = 0; i < 1000; i++)
{
r.Post(z => {
Assert.IsTrue(Interlocked.Increment(ref n) == 1);
Assert.IsTrue(Interlocked.Decrement(ref n) == 0);
}, null);
}
var a = new TaskCompletionSource();
r.Post(z => a.SetRanToCompletion(), null);
a.Task.AssertRanToCompletion();
}
public void WaitsForAsyncAndCancels()
{
var r = new DiscardRedundantWorkThrottle();
var h = new TaskCompletionSource();
var t1 = r.SetNextToAsyncFunction(() => h.Task);
var t2 = r.SetNextToAction(() => { });
new[] { t1, t2 }.WhenAny().AssertNotCompleted();
var t3 = r.SetNextToAction(() => { });
t2.AssertCancelled();
new[] { t1, t3 }.WhenAny().AssertNotCompleted();
h.SetRanToCompletion();
t1.AssertRanToCompletion();
t3.AssertRanToCompletion();
}
public void NoInterference()
{
var r = new ExclusiveSynchronizationContext();
var n = 0;
var t = Task.WhenAll(Enumerable.Range(0, 5).Select(async e => await Task.Factory.StartNew(() => {
for (var i = 0; i < 500; i++)
{
r.Post(z => {
n += 1;
}, null);
}
var a = new TaskCompletionSource();
r.Post(z => a.SetRanToCompletion(), null);
a.Task.AssertRanToCompletion();
})));
t.AssertRanToCompletion(timeout: TimeSpan.FromSeconds(20)); // lots of work, long timeout
Assert.IsTrue(n == 500 * 5);
}
