public async Task Never1()
{
var xs = AsyncEnumerableEx.Never <int>();
var e = xs.GetAsyncEnumerator();
Assert.False(e.MoveNextAsync().IsCompleted); // Very rudimentary check
await e.DisposeAsync();
}
public async Task CancelToken_UnblocksAsync()
{
using var cts = new CancellationTokenSource();
var en = AsyncEnumerableEx.Never <int>().GetAsyncEnumerator(cts.Token);
try
{
cts.CancelAfter(100);
await Assert.ThrowsAsync <TaskCanceledException>(() => en.MoveNextAsync().AsTask());
}
finally
{
await en.DisposeAsync();
}
}
public async Task Timeout_Never()
{
var source = AsyncEnumerableEx.Never <int>().Timeout(TimeSpan.FromMilliseconds(100));
var en = source.GetAsyncEnumerator();
try
{
await en.MoveNextAsync();
Assert.False(true, "MoveNextAsync should have thrown");
}
catch (TimeoutException)
{
// expected
}
finally
{
await en.DisposeAsync();
}
}
