public void Respects_cancellation_token()
{
// setup
var handler = new ConcurrencyLimitingMessageHandler(0, new TestHandler(0));
var client = new HttpClient(handler)
{
Timeout = TimeSpan.FromMilliseconds(1)
};
// execute
Func <Task> exec = async() => await client.GetAsync("http://localhost/bar");
// validate
exec.ShouldThrow <OperationCanceledException>();
}
public void Does_not_exceed_concurrency(IEnumerable <Uri> uris, int maxConcurrency)
{
// setup
var testHandler = new TestHandler(maxConcurrency);
var handler = new ConcurrencyLimitingMessageHandler(maxConcurrency, testHandler);
var client = new HttpClient(handler);
// execute
var parallelRequests = uris.Select(uri => client.GetAsync(uri));
Func <Task> exec = async() => await Task.WhenAll(parallelRequests);
// validate
// when validating the maximal seen number of execution, let's allow for some error in case the
// test ran a bit slower. Usually it should match though.
exec.ShouldNotThrow($"Error while executing with max concurrency of {maxConcurrency}");
testHandler.MaxSeenNumberOfExecutions.Should().BeInRange(maxConcurrency - 2, maxConcurrency);
}
