public async Task ZeroDelayAddsInline()
{
// arrange
var state = "setup";
var added = new List <(string state, string item)>();
var fake = new FakeQueue <string>
{
OnAdd = item => added.Add((state, item)),
};
var clock = new FakeSystemClock();
IDelayingQueue <string> delayingQueue = new DelayingQueue <string>(clock, fake);
// act
state = "before-one";
delayingQueue.AddAfter("one", TimeSpan.FromMilliseconds(1));
state = "after-one";
await Task.Delay(TimeSpan.FromMilliseconds(40));
state = "before-two";
delayingQueue.AddAfter("two", TimeSpan.FromMilliseconds(0));
state = "after-two";
await Task.Delay(TimeSpan.FromMilliseconds(40));
state = "before-three";
delayingQueue.AddAfter("three", TimeSpan.FromMilliseconds(1));
state = "after-three";
await Task.Delay(TimeSpan.FromMilliseconds(40));
// assert
added.ShouldHaveSingleItem().ShouldBe(("before-two", "two"));
}
public async Task DelayingQueueAddsWhenTimePasses()
{
// arrange
var added = new List <string>();
var fake = new FakeQueue <string>
{
OnAdd = added.Add,
};
var clock = new FakeSystemClock();
IDelayingQueue <string> delayingQueue = new DelayingQueue <string>(clock, fake);
// act
delayingQueue.AddAfter("50ms", TimeSpan.FromMilliseconds(50));
delayingQueue.AddAfter("100ms", TimeSpan.FromMilliseconds(100));
clock.Advance(TimeSpan.FromMilliseconds(25));
delayingQueue.AddAfter("75ms", TimeSpan.FromMilliseconds(50));
delayingQueue.AddAfter("125ms", TimeSpan.FromMilliseconds(100));
await Task.Delay(TimeSpan.FromMilliseconds(40));
var countAfter25ms = added.Count;
clock.Advance(TimeSpan.FromMilliseconds(30));
await Task.Delay(TimeSpan.FromMilliseconds(40));
var countAfter55ms = added.Count;
clock.Advance(TimeSpan.FromMilliseconds(25));
await Task.Delay(TimeSpan.FromMilliseconds(40));
var countAfter80ms = added.Count;
clock.Advance(TimeSpan.FromMilliseconds(25));
await Task.Delay(TimeSpan.FromMilliseconds(40));
var countAfter105ms = added.Count;
clock.Advance(TimeSpan.FromMilliseconds(25));
await Task.Delay(TimeSpan.FromMilliseconds(40));
var countAfter135ms = added.Count;
// assert
countAfter25ms.ShouldBe(0);
countAfter55ms.ShouldBe(1);
countAfter80ms.ShouldBe(2);
countAfter105ms.ShouldBe(3);
countAfter135ms.ShouldBe(4);
added.ShouldBe(new[] { "50ms", "75ms", "100ms", "125ms" }, ignoreOrder: false);
}
public async Task NoAddingAfterShutdown()
{
// arrange
var added = new List <string>();
var fake = new FakeQueue <string>
{
OnAdd = added.Add,
};
var clock = new FakeSystemClock();
IDelayingQueue <string> delayingQueue = new DelayingQueue <string>(clock, fake);
// act
delayingQueue.AddAfter("one", TimeSpan.FromMilliseconds(10));
delayingQueue.ShutDown();
delayingQueue.AddAfter("two", TimeSpan.FromMilliseconds(10));
clock.Advance(TimeSpan.FromMilliseconds(25));
await Task.Delay(TimeSpan.FromMilliseconds(40));
// assert
added.ShouldBeEmpty();
}
public void DelayingQueuePassesCallsThrough()
{
// arrange
var added = new List <string>();
var doned = new List <string>();
var fake = new FakeQueue <string>
{
OnAdd = added.Add,
OnDone = doned.Add,
OnLen = () => 42,
};
var clock = new FakeSystemClock();
IDelayingQueue <string> delayingQueue = new DelayingQueue <string>(clock, fake);
// act
delayingQueue.Add("one");
delayingQueue.Done("two");
var len = delayingQueue.Len();
// assert
added.ShouldHaveSingleItem().ShouldBe("one");
doned.ShouldHaveSingleItem().ShouldBe("two");
len.ShouldBe(42);
}