public async Task Await_ShouldThrowIfFaulted()
{
// Arrange
var op = new AsyncCompletionSource();
var expectedException = new Exception();
var actualException = default(Exception);
var task = Task.Run(() =>
{
Thread.Sleep(10);
op.SetException(expectedException);
});
// Act
try
{
await op;
}
catch (Exception e)
{
actualException = e;
}
// Assert
Assert.Equal(expectedException, actualException);
AssertFaulted(op);
}
public void SetException_ThrowsIfOperationIsCompleted(AsyncOperationStatus status)
{
// Arrange
var e = new Exception();
var op = new AsyncCompletionSource(status);
// Act/Assert
Assert.Throws <InvalidOperationException>(() => op.SetException(e));
Assert.True(op.CompletedSynchronously);
}
public void ToObservable_OnCompletedIsNotCalledOnError()
{
// Arrange
var op = new AsyncCompletionSource <int>();
var observer = new Observer <int>();
var observable = op.Subscribe(observer);
// Act
op.SetException(new Exception());
// Assert
Assert.Equal(0, observer.OnCompletedCount);
}
public void ToObservable_OnErrorIsCalled()
{
// Arrange
var e = new Exception();
var op = new AsyncCompletionSource <int>();
var observer = new Observer <int>();
var observable = op.Subscribe(observer);
// Act
op.SetException(e);
// Assert
Assert.Equal(1, observer.OnErrorCount);
Assert.Equal(e, observer.Exception);
}
