public void DequeueShouldReturnQueuedWorkItemWhenQueueIsNotEmpty()
{
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 1000);
IWorkItem workItemFirst = Substitute.For <IWorkItem>();
IWorkItem workItemLast = Substitute.For <IWorkItem>();
workItemQueue.Enqueue(workItemFirst);
workItemQueue.Enqueue(workItemLast);
Assert.AreEqual(workItemFirst, workItemQueue.Dequeue());
Assert.AreEqual(workItemLast, workItemQueue.Dequeue());
}
public void ShutDownShouldNotBlockDequeueWhenThereAreWorkItemsInTheQueue()
{
ManualResetEvent manualResetEvent = new ManualResetEvent(false);
const int workItemWaiterTimeOutInMilliSeconds = 1000;
WorkItemQueue workItemQueue = new WorkItemQueue(workItemWaiterTimeOutInMilliSeconds);
IWorkItem workItem = Substitute.For <IWorkItem>();
workItemQueue.Enqueue(workItem);
new Thread(
() =>
{
manualResetEvent.Set();
manualResetEvent.Reset();
manualResetEvent.WaitOne(300);
IWorkItem dequeuedWorkItem = workItemQueue.Dequeue();
Assert.AreEqual(workItem, dequeuedWorkItem);
}).Start();
manualResetEvent.WaitOne(300);
workItemQueue.ShutDown();
manualResetEvent.Set();
}
public void ShutDownShouldNotWaitMoreThanWaiterTimeOutWhenThereIsNoWorkItemsInTheQueue()
{
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
const int workItemWaiterTimeOutInMilliSeconds = 1000;
WorkItemQueue workItemQueue = new WorkItemQueue(workItemWaiterTimeOutInMilliSeconds);
new Thread(
() =>
{
Thread.Sleep(100);
autoResetEvent.Set();
IWorkItem workItem = workItemQueue.Dequeue();
autoResetEvent.Set();
Assert.AreEqual(null, workItem);
}).Start();
autoResetEvent.WaitOne(500);
Stopwatch stopwatch = Stopwatch.StartNew();
workItemQueue.ShutDown();
autoResetEvent.WaitOne(workItemWaiterTimeOutInMilliSeconds + 100);
stopwatch.Stop();
Assert.Less(stopwatch.ElapsedMilliseconds, workItemWaiterTimeOutInMilliSeconds);
}
public void DequeueShouldReturnQueuedWorkItemWhenTheWaiterIsNotTimedOut()
{
IWorkItem workItem = Substitute.For <IWorkItem>();
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 1000);
new Thread(
() =>
{
Thread.Sleep(200);
workItemQueue.Enqueue(workItem);
}).Start();
Assert.AreEqual(workItem, workItemQueue.Dequeue());
Assert.AreEqual(0, workItemQueue.Count);
Assert.AreEqual(0, workItemQueue.WorkItemWaiterEntryStack.Count);
}
public void DequeueShouldReturnNullWhenTheWaiterIsTimedOut()
{
IWorkItem workItem = Substitute.For <IWorkItem>();
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 300);
new Thread(
() =>
{
Thread.Sleep(1000);
workItemQueue.Enqueue(workItem);
autoResetEvent.Set();
}).Start();
Assert.AreEqual(null, workItemQueue.Dequeue());
autoResetEvent.WaitOne();
Assert.AreEqual(1, workItemQueue.Count);
Assert.AreEqual(0, workItemQueue.WorkItemWaiterEntryStack.Count);
}
public WorkItem DequeueWorkItem()
{
lock (_syncObj)
return(_workItemQueue.Count == 0 ? null : _workItemQueue.Dequeue());
}
public void ShutDownShouldNotBlockDequeueWhenThereAreWorkItemsInTheQueue()
{
ManualResetEvent manualResetEvent = new ManualResetEvent(false);
const int workItemWaiterTimeOutInMilliSeconds = 1000;
WorkItemQueue workItemQueue = new WorkItemQueue(workItemWaiterTimeOutInMilliSeconds);
IWorkItem workItem = Substitute.For<IWorkItem>();
workItemQueue.Enqueue(workItem);
new Thread(
() =>
{
manualResetEvent.Set();
manualResetEvent.Reset();
manualResetEvent.WaitOne(300);
IWorkItem dequeuedWorkItem = workItemQueue.Dequeue();
Assert.AreEqual(workItem, dequeuedWorkItem);
}).Start();
manualResetEvent.WaitOne(300);
workItemQueue.ShutDown();
manualResetEvent.Set();
}
public void ShutDownShouldNotWaitMoreThanWaiterTimeOutWhenThereIsNoWorkItemsInTheQueue()
{
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
const int workItemWaiterTimeOutInMilliSeconds = 1000;
WorkItemQueue workItemQueue = new WorkItemQueue(workItemWaiterTimeOutInMilliSeconds);
new Thread(
() =>
{
Thread.Sleep(100);
autoResetEvent.Set();
IWorkItem workItem = workItemQueue.Dequeue();
autoResetEvent.Set();
Assert.AreEqual(null, workItem);
}).Start();
autoResetEvent.WaitOne(500);
Stopwatch stopwatch = Stopwatch.StartNew();
workItemQueue.ShutDown();
autoResetEvent.WaitOne(workItemWaiterTimeOutInMilliSeconds + 100);
stopwatch.Stop();
Assert.Less(stopwatch.ElapsedMilliseconds, workItemWaiterTimeOutInMilliSeconds);
}
public void DequeueShouldReturnNullWhenTheWaiterIsTimedOut()
{
IWorkItem workItem = Substitute.For<IWorkItem>();
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 300);
new Thread(
() =>
{
Thread.Sleep(1000);
workItemQueue.Enqueue(workItem);
autoResetEvent.Set();
}).Start();
Assert.AreEqual(null, workItemQueue.Dequeue());
autoResetEvent.WaitOne();
Assert.AreEqual(1, workItemQueue.Count);
Assert.AreEqual(0, workItemQueue.WorkItemWaiterEntryStack.Count);
}
public void DequeueShouldReturnQueuedWorkItemWhenTheWaiterIsNotTimedOut()
{
IWorkItem workItem = Substitute.For<IWorkItem>();
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 1000);
new Thread(
() =>
{
Thread.Sleep(200);
workItemQueue.Enqueue(workItem);
}).Start();
Assert.AreEqual(workItem, workItemQueue.Dequeue());
Assert.AreEqual(0, workItemQueue.Count);
Assert.AreEqual(0, workItemQueue.WorkItemWaiterEntryStack.Count);
}
public void DequeueShouldReturnQueuedWorkItemWhenQueueIsNotEmpty()
{
WorkItemQueue workItemQueue = new WorkItemQueue(1 * 1000);
IWorkItem workItemFirst = Substitute.For<IWorkItem>();
IWorkItem workItemLast = Substitute.For<IWorkItem>();
workItemQueue.Enqueue(workItemFirst);
workItemQueue.Enqueue(workItemLast);
Assert.AreEqual(workItemFirst, workItemQueue.Dequeue());
Assert.AreEqual(workItemLast, workItemQueue.Dequeue());
}