public void Concat_Null()
{
AssertThrows <ArgumentNullException>(() => AsyncEnumerable.Concat <int>(null, AsyncEnumerable.Return(42)));
AssertThrows <ArgumentNullException>(() => AsyncEnumerable.Concat <int>(AsyncEnumerable.Return(42), null));
AssertThrows <ArgumentNullException>(() => AsyncEnumerable.Concat <int>(default(IAsyncEnumerable <int>[])));
AssertThrows <ArgumentNullException>(() => AsyncEnumerable.Concat <int>(default(IEnumerable <IAsyncEnumerable <int> >)));
}
public async Task Concat9()
{
var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
var ys = new[] { 4, 5 }.ToAsyncEnumerable();
var zs = new[] { 6, 7, 8 }.ToAsyncEnumerable();
var res = AsyncEnumerable.Concat(xs, ys, zs);
await SequenceIdentity(res);
}
public void Concat6()
{
var res = AsyncEnumerable.Concat(ConcatXss());
var e = res.GetEnumerator();
HasNext(e, 1);
HasNext(e, 2);
HasNext(e, 3);
HasNext(e, 4);
HasNext(e, 5);
AssertThrows <Exception>(() => e.MoveNext().Wait(WaitTimeoutMs), ex_ => ((AggregateException)ex_).Flatten().InnerExceptions.Single().Message == "Bang!");
}