public void OnCompleted_UsedTwiceBeforeCompletion_Throws()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.OnCompleted(_ => { }, null, 0, ValueTaskSourceOnCompletedFlags.None);
Assert.Throws <InvalidOperationException>(() => mrvts.OnCompleted(_ => { }, null, 0, ValueTaskSourceOnCompletedFlags.None));
}
public void AccessWrongVersion_Fails()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.Reset();
Assert.Throws <InvalidOperationException>(() => mrvts.GetResult(0));
Assert.Throws <InvalidOperationException>(() => mrvts.GetStatus(0));
Assert.Throws <InvalidOperationException>(() => mrvts.OnCompleted(_ => { }, new object(), 0, ValueTaskSourceOnCompletedFlags.None));
Assert.Throws <InvalidOperationException>(() => mrvts.GetResult(2));
Assert.Throws <InvalidOperationException>(() => mrvts.GetStatus(2));
Assert.Throws <InvalidOperationException>(() => mrvts.OnCompleted(_ => { }, new object(), 2, ValueTaskSourceOnCompletedFlags.None));
}
public async Task SetResult_AfterOnCompleted_ResultAvailableAsynchronously()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.Reset();
mrvts.Reset();
Assert.Equal(2, mrvts.Version);
Assert.Equal(ValueTaskSourceStatus.Pending, mrvts.GetStatus(2));
Assert.Throws <InvalidOperationException>(() => mrvts.GetResult(2));
var onCompletedRan = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
mrvts.OnCompleted(s => ((TaskCompletionSource)s).SetResult(), onCompletedRan, 2, ValueTaskSourceOnCompletedFlags.None);
Assert.False(onCompletedRan.Task.IsCompleted);
await Task.Delay(1);
Assert.False(onCompletedRan.Task.IsCompleted);
mrvts.SetResult(42);
Assert.Equal(ValueTaskSourceStatus.Succeeded, mrvts.GetStatus(2));
Assert.Equal(42, mrvts.GetResult(2));
await onCompletedRan.Task;
Assert.Equal(2, mrvts.Version);
}
public async Task SynchronizationContext_CaptureIfRequested(
bool runContinuationsAsynchronously, bool captureSyncCtx, bool setBeforeOnCompleted)
{
await Task.Run(async() => // escape xunit sync ctx
{
var mrvts = new ManualResetValueTaskSource <int>()
{
RunContinuationsAsynchronously = runContinuationsAsynchronously
};
if (setBeforeOnCompleted)
{
mrvts.SetResult(42);
}
var tcs = new TaskCompletionSource();
var sc = new TrackingSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(sc);
Assert.Equal(0, sc.Posts);
mrvts.OnCompleted(
_ => tcs.SetResult(),
null,
0,
captureSyncCtx ? ValueTaskSourceOnCompletedFlags.UseSchedulingContext : ValueTaskSourceOnCompletedFlags.None);
SynchronizationContext.SetSynchronizationContext(null);
if (!setBeforeOnCompleted)
{
mrvts.SetResult(42);
}
await tcs.Task;
Assert.Equal(captureSyncCtx ? 1 : 0, sc.Posts);
});
}
public void SetResult_RunContinuationsAsynchronously_ContinuationInvokedAccordingly(bool runContinuationsAsynchronously)
{
var mres = new ManualResetEventSlim();
var mrvts = new ManualResetValueTaskSource <int>()
{
RunContinuationsAsynchronously = runContinuationsAsynchronously
};
for (short i = 0; i < 10; i++)
{
int threadId = Environment.CurrentManagedThreadId;
mrvts.OnCompleted(
_ =>
{
Assert.Equal(!runContinuationsAsynchronously, threadId == Environment.CurrentManagedThreadId);
mres.Set();
},
null,
i,
ValueTaskSourceOnCompletedFlags.None);
mrvts.SetResult(42);
mres.Wait();
mrvts.Reset();
mres.Reset();
}
}
public async Task SetResult_RunContinuationsAsynchronously_ContinuationInvokedAccordingly(bool runContinuationsAsynchronously)
{
var mrvts = new ManualResetValueTaskSource <int>()
{
RunContinuationsAsynchronously = runContinuationsAsynchronously
};
for (short i = 0; i < 10; i++)
{
var tcs = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
var tl = new ThreadLocal <int> {
Value = 42
};
mrvts.OnCompleted(
_ =>
{
Assert.Equal(!runContinuationsAsynchronously, tl.Value == 42);
tcs.SetResult();
},
null,
i,
ValueTaskSourceOnCompletedFlags.None);
mrvts.SetResult(42);
mrvts.Reset();
tl.Value = 0;
await tcs.Task;
}
}
public void SetResult_BeforeOnCompleted_ResultAvailableSynchronously()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.Reset();
mrvts.Reset();
Assert.Equal(2, mrvts.Version);
mrvts.SetResult(42);
Assert.Equal(ValueTaskSourceStatus.Succeeded, mrvts.GetStatus(2));
Assert.Equal(42, mrvts.GetResult(2));
var mres = new ManualResetEventSlim();
mrvts.OnCompleted(s => ((ManualResetEventSlim)s).Set(), mres, 2, ValueTaskSourceOnCompletedFlags.None);
mres.Wait();
Assert.Equal(2, mrvts.Version);
}
public void FlowContext_SetAfterOnCompleted_FlowsIfExpected(bool flowContext)
{
var mres = new ManualResetEventSlim();
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.RunContinuationsAsynchronously = true;
var al = new AsyncLocal <int>();
al.Value = 42;
mrvts.OnCompleted(
_ => { Assert.Equal(flowContext ? 42 : 0, al.Value); mres.Set(); },
null,
0,
flowContext ? ValueTaskSourceOnCompletedFlags.FlowExecutionContext : ValueTaskSourceOnCompletedFlags.None);
mrvts.SetResult(1);
mres.Wait();
}
public async Task SetResult_BeforeOnCompleted_ResultAvailableSynchronously()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.Reset();
mrvts.Reset();
Assert.Equal(2, mrvts.Version);
mrvts.SetResult(42);
Assert.Equal(ValueTaskSourceStatus.Succeeded, mrvts.GetStatus(2));
Assert.Equal(42, mrvts.GetResult(2));
var tcs = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
mrvts.OnCompleted(s => ((TaskCompletionSource)s).SetResult(), tcs, 2, ValueTaskSourceOnCompletedFlags.None);
await tcs.Task;
Assert.Equal(2, mrvts.Version);
}
public async Task FlowContext_SetAfterOnCompleted_FlowsIfExpected(bool flowContext)
{
var tcs = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.RunContinuationsAsynchronously = true;
var al = new AsyncLocal <int>();
al.Value = 42;
mrvts.OnCompleted(
_ => { Assert.Equal(flowContext ? 42 : 0, al.Value); tcs.SetResult(); },
null,
0,
flowContext ? ValueTaskSourceOnCompletedFlags.FlowExecutionContext : ValueTaskSourceOnCompletedFlags.None);
mrvts.SetResult(1);
await tcs.Task;
}
public void SetException_BeforeOnCompleted_ResultAvailableSynchronously()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.Reset();
mrvts.Reset();
Assert.Equal(2, mrvts.Version);
var e = new FormatException();
mrvts.SetException(e);
Assert.Equal(ValueTaskSourceStatus.Faulted, mrvts.GetStatus(2));
Assert.Same(e, Assert.Throws <FormatException>(() => mrvts.GetResult(2)));
var mres = new ManualResetEventSlim();
mrvts.OnCompleted(s => ((ManualResetEventSlim)s).Set(), mres, 2, ValueTaskSourceOnCompletedFlags.None);
mres.Wait();
Assert.Equal(2, mrvts.Version);
}
public async Task SetException_BeforeOnCompleted_ResultAvailableSynchronously()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.Reset();
mrvts.Reset();
Assert.Equal(2, mrvts.Version);
var e = new FormatException();
mrvts.SetException(e);
Assert.Equal(ValueTaskSourceStatus.Faulted, mrvts.GetStatus(2));
Assert.Same(e, Assert.Throws <FormatException>(() => mrvts.GetResult(2)));
var tcs = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
mrvts.OnCompleted(s => ((TaskCompletionSource)s).SetResult(), tcs, 2, ValueTaskSourceOnCompletedFlags.None);
await tcs.Task;
Assert.Equal(2, mrvts.Version);
}
public async Task TaskScheduler_CaptureIfRequested(
bool runContinuationsAsynchronously, bool captureTaskScheduler, bool setBeforeOnCompleted)
{
await Task.Run(async() => // escape xunit sync ctx
{
var mrvts = new ManualResetValueTaskSource <int>()
{
RunContinuationsAsynchronously = runContinuationsAsynchronously
};
if (setBeforeOnCompleted)
{
mrvts.SetResult(42);
}
var tcs = new TaskCompletionSource();
var ts = new TrackingTaskScheduler();
Assert.Equal(0, ts.QueueTasks);
await Task.Factory.StartNew(() =>
{
mrvts.OnCompleted(
_ => tcs.SetResult(),
null,
0,
captureTaskScheduler ? ValueTaskSourceOnCompletedFlags.UseSchedulingContext : ValueTaskSourceOnCompletedFlags.None);
}, CancellationToken.None, TaskCreationOptions.None, ts);
if (!setBeforeOnCompleted)
{
mrvts.SetResult(42);
}
await tcs.Task;
Assert.Equal(captureTaskScheduler ? 2 : 1, ts.QueueTasks);
});
}
public void OnCompleted_UnknownFlagsIgnored()
{
var mrvts = new ManualResetValueTaskSource <int>();
mrvts.OnCompleted(_ => { }, new object(), 0, (ValueTaskSourceOnCompletedFlags)int.MaxValue);
}
public void OnCompleted_NullDelegate_Throws()
{
var mrvts = new ManualResetValueTaskSource <int>();
AssertExtensions.Throws <ArgumentNullException>("continuation", () => mrvts.OnCompleted(null, new object(), 0, ValueTaskSourceOnCompletedFlags.None));
}