public void TrySetException_ThrowsIfExceptionIsNull()
{
// Arrange
var op = new AsyncCompletionSource();
// Act/Assert
Assert.Throws <ArgumentNullException>(() => op.TrySetException(null));
}
public void TrySetException_ThrowsIfOperationIsDisposed()
{
// Arrange
var e = new Exception();
var op = new AsyncCompletionSource(AsyncOperationStatus.RanToCompletion);
op.Dispose();
// Act/Assert
Assert.Throws <ObjectDisposedException>(() => op.TrySetException(e));
}
public void TrySetException_SetsStatusToCanceled(AsyncOperationStatus status)
{
// Arrange
var e = new OperationCanceledException();
var op = new AsyncCompletionSource(status);
// Act
var result = op.TrySetException(e);
// Assert
Assert.True(op.IsCanceled);
Assert.True(result);
Assert.Equal(e, op.Exception);
}
public void TrySetException_RaisesCompletionCallbacks()
{
// Arrange
var e = new Exception();
var asyncCallbackCalled1 = false;
var asyncCallbackCalled2 = false;
var op = new AsyncCompletionSource(asyncResult => asyncCallbackCalled1 = true, null);
op.AddCompletionCallback(asyncOp => asyncCallbackCalled2 = true, null);
// Act
op.TrySetException(e);
// Assert
Assert.True(asyncCallbackCalled1);
Assert.True(asyncCallbackCalled2);
}
