public void ToObservable_DisposesEnumeratorOnCompletion()
{
var fail = false;
var evt = new ManualResetEvent(false);
var ae = AsyncEnumerable.Create(
_ => AsyncEnumerator.Create <int>(
() => new ValueTask <bool>(false),
() => { throw new InvalidOperationException(); },
() => { evt.Set(); return(default); }));
protected static IAsyncEnumerable <TValue> Throw <TValue>(Exception exception)
{
if (exception == null)
{
throw new ArgumentNullException(nameof(exception));
}
#if NO_TASK_FROMEXCEPTION
var tcs = new TaskCompletionSource <bool>();
tcs.TrySetException(exception);
var moveNextThrows = new ValueTask <bool>(tcs.Task);
#else
var moveNextThrows = new ValueTask <bool>(Task.FromException <bool>(exception));
#endif
return(AsyncEnumerable.Create(
_ => AsyncEnumerator.Create <TValue>(
() => moveNextThrows,
getCurrent: null,
disposeAsync: null)
));
}
