public async Task Cancellation()
{
var cts = new CancellationTokenSource();
var gatekeeperSource = new TaskCompletionSource <int>();
var resource = new PageStreamedResource(
"check",
new Page("x", 1, 2, 3),
new Page("y", 4, 5),
new Page(null, 6, 7));
resource.gateKeeper = gatekeeperSource.Task;
var task = PageStreamedResource.PageStreamer.FetchAllAsync(new Request(resource), cts.Token);
// Delay the resource fetching until we've cancelled the token
cts.Cancel();
gatekeeperSource.SetResult(0);
// TODO: Move to Assert.ThrowsAsync when we update to an appropriate version of NUnit.
// Assert.That is available, but the documentation is unclear how this interacts with await.
try
{
await task;
Assert.Fail("Expected exception");
}
catch (OperationCanceledException)
{
// Expected
}
}
public async Task FetchAllAsync(PageStreamedResource resource)
{
var actual = await PageStreamedResource.PageStreamer.FetchAllAsync(
new Request(resource),
CancellationToken.None);
Assert.AreEqual(resource.AllItems, actual);
}
public void Fetch(PageStreamedResource resource)
{
var actual = PageStreamedResource.PageStreamer.Fetch(new Request(resource));
Assert.AreEqual(resource.AllItems, actual);
}
internal Request(PageStreamedResource resource)
{
this.resource = resource;
}