public void Eagerly_Validates_Source() { var target = new ThrowingAsyncEnumerable <int>(); Assert.Throws <ArgumentNullException>(() => { var iter = AsyncEnumerable.Cast <int, object>((IAsyncEnumerable <int>)null); }); }
public async Task Awaiting_Causes_Iteration() { var target = new ThrowingAsyncEnumerable <int>(); await Assert.ThrowsAsync <NotImplementedException>(async() => { await using (var items = AsyncEnumerable.Cast <int, object>(target).GetAsyncEnumerator()) { await items.MoveNextAsync(); } }); }