void will_not_dequeue_callbacks_more_recent_than_the_expiry()
{
var queue = new CallbackQueue();
Action<IEnumerable<string>, DateTime> firstCallback = (messages, since) => { };
var now = DateTime.UtcNow;
queue.Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(firstCallback, now.AddHours(1)));
List<Action<IEnumerable<string>, DateTime>> callbacks = new List<Action<IEnumerable<string>, DateTime>>();
foreach (var callback in queue.DequeueExpired(now))
callbacks.Add(callback);
Assert.Equal(0, callbacks.Count);
}
void will_dequeue_all_callbacks()
{
var queue = new CallbackQueue();
Action<IEnumerable<string>, DateTime> firstCallback = (messages, since) => { };
Action<IEnumerable<string>, DateTime> secondCallback = (messages, since) => { };
queue.Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(firstCallback, DateTime.UtcNow));
queue.Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(secondCallback, DateTime.UtcNow));
List<Action<IEnumerable<string>, DateTime>> callbacks = new List<Action<IEnumerable<string>, DateTime>>();
foreach (var callback in queue.DequeueAll())
callbacks.Add(callback);
Assert.Same(firstCallback, callbacks[0]);
Assert.Same(secondCallback, callbacks[1]);
}
void will_dequeue_all_callbacks_older_than_the_expiry()
{
var queue = new CallbackQueue();
Action<IEnumerable<string>, DateTime> firstCallback = (messages, since) => { };
Action<IEnumerable<string>, DateTime> secondCallback = (messages, since) => { };
Action<IEnumerable<string>, DateTime> thirdCallback = (messages, since) => { };
var now = DateTime.UtcNow;
queue.Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(firstCallback, now.AddHours(-1)));
queue.Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(secondCallback, now.AddSeconds(-1)));
queue.Callbacks.Enqueue(new Tuple<Action<IEnumerable<string>, DateTime>, DateTime>(thirdCallback, now.AddSeconds(1)));
List<Action<IEnumerable<string>, DateTime>> callbacks = new List<Action<IEnumerable<string>, DateTime>>();
foreach (var callback in queue.DequeueExpired(now))
callbacks.Add(callback);
Assert.Equal(2, callbacks.Count);
Assert.Same(firstCallback, callbacks[0]);
Assert.Same(secondCallback, callbacks[1]);
}
void will_return_an_empty_result_when_there_are_no_queued_callbacks()
{
var queue = new CallbackQueue();
List<Action<IEnumerable<string>, DateTime>> callbacks = new List<Action<IEnumerable<string>, DateTime>>();
foreach (var callback in queue.DequeueExpired(DateTime.UtcNow))
callbacks.Add(callback);
Assert.Equal(0, callbacks.Count);
}
void will_add_the_callback_to_the_queue()
{
var queue = new CallbackQueue();
Action<IEnumerable<string>, DateTime> callback = (messages, since) => { };
queue.Enqueue(callback);
Assert.Same(callback, queue.Callbacks.First().Item1);
}
void will_add_a_timestamp_to_the_callback()
{
var queue = new CallbackQueue();
Action<IEnumerable<string>, DateTime> callback = (messages, since) => { };
queue.Enqueue(callback);
Assert.NotEqual(DateTime.MinValue, queue.Callbacks.First().Item2);
}