public void AwaitableSyncContexts() {
var r = new ExclusiveSynchronizationContext();
Task.Factory.StartNew(async () => {
SynchronizationContext.Current.AssertDoesNotEqual(r);
await r;
SynchronizationContext.Current.AssertEquals(r);
}).Unwrap().AssertRanToCompletion();
}
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 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);
}