public void TrySetCanceled_ThrowsIfOperationIsDisposed()
{
// Arrange
var op = new AsyncCompletionSource(AsyncOperationStatus.RanToCompletion);
op.Dispose();
// Act/Assert
Assert.Throws <ObjectDisposedException>(() => op.TrySetCanceled());
}
public void TrySetCanceled_SetsStatusToCanceled(AsyncOperationStatus status)
{
// Arrange
var op = new AsyncCompletionSource(status);
// Act
var result = op.TrySetCanceled();
// Assert
Assert.True(op.IsCanceled);
Assert.True(result);
}
public void TrySetCanceled_FailsIfOperationIsCompleted()
{
// Arrange
var op = new AsyncCompletionSource(AsyncOperationStatus.RanToCompletion);
// Act
var result = op.TrySetCanceled();
// Assert
Assert.False(result);
Assert.True(op.CompletedSynchronously);
Assert.True(op.IsCompletedSuccessfully);
}
public void TrySetCanceled_RaisesCompletionCallbacks()
{
// Arrange
var asyncCallbackCalled1 = false;
var asyncCallbackCalled2 = false;
var op = new AsyncCompletionSource(asyncResult => asyncCallbackCalled1 = true, null);
op.AddCompletionCallback(asyncOp => asyncCallbackCalled2 = true, null);
// Act
op.TrySetCanceled();
// Assert
Assert.True(asyncCallbackCalled1);
Assert.True(asyncCallbackCalled2);
}
