public async Task Await_ShouldThrowIfCanceled()
{
// Arrange
var op = new AsyncCompletionSource();
var actualException = default(Exception);
var task = Task.Run(() =>
{
Thread.Sleep(10);
op.SetCanceled();
});
// Act
try
{
await op;
}
catch (Exception e)
{
actualException = e;
}
// Assert
Assert.IsType <OperationCanceledException>(actualException);
AssertCanceled(op);
}
public void SetCanceled_ThrowsIfOperationIsCompleted(AsyncOperationStatus status)
{
// Arrange
var op = new AsyncCompletionSource(status);
// Act/Assert
Assert.Throws <InvalidOperationException>(() => op.SetCanceled());
Assert.True(op.CompletedSynchronously);
}
public void TryAddCompletionCallback_FailsIfOperationIsCompleted()
{
// Arrange
var op = new AsyncCompletionSource();
op.SetCanceled();
// Act
var result = op.TryAddCompletionCallback(_ => { }, null);
// Assert
Assert.False(result);
}
public void ToObservable_OnCompletedIsCalledOnCancellation()
{
// Arrange
var op = new AsyncCompletionSource <int>();
var observer = new Observer <int>();
var observable = op.Subscribe(observer);
// Act
op.SetCanceled();
// Assert
Assert.Equal(1, observer.OnErrorCount);
}
