public void PurgeAllItems_QueueContainsThreeItems_ResultIsArrayHasTheSameOrderAsTheQueue()
{
// Arrange
var queue = new SystemInformationMessageQueue();
var items = new[]
{
new SystemInformation {
MachineName = "1", Timestamp = DateTime.UtcNow
},
new SystemInformation {
MachineName = "2", Timestamp = DateTime.UtcNow
},
new SystemInformation {
MachineName = "3", Timestamp = DateTime.UtcNow
}
};
foreach (var item in items)
{
queue.Enqueue(new SystemInformationQueueItem(item));
}
// Act
var result = queue.PurgeAllItems();
// Assert
for (int i = 0; i < result.Length; i++)
{
Assert.AreEqual(items[i], result[i].Item);
}
}
public void PurgeAllItems_QueueContainsThreeItems_ResultIsArrayWithThreeItems()
{
// Arrange
var queue = new SystemInformationMessageQueue();
var items = new[]
{
new SystemInformation {
MachineName = "1", Timestamp = DateTime.UtcNow
},
new SystemInformation {
MachineName = "2", Timestamp = DateTime.UtcNow
},
new SystemInformation {
MachineName = "3", Timestamp = DateTime.UtcNow
}
};
foreach (var item in items)
{
queue.Enqueue(new SystemInformationQueueItem(item));
}
// Act
var result = queue.PurgeAllItems();
// Assert
Assert.AreEqual(items.Length, result.Length);
}
public void PurgeAllItems_OnEmptyQueue_ResultIsEmptyArray()
{
// Arrange
var queue = new SystemInformationMessageQueue();
// Act
var results = queue.PurgeAllItems();
// Assert
Assert.IsEmpty(results);
}
public void PurgeQueueWhileEnqueuing_AllItemsThatAreEnqueuedAreAlsoDequeued()
{
// Arrange
var itemPoolSize = 10000000;
var itemPool = TestUtilities.GetSystemInformationObjects(itemPoolSize);
var queue = new SystemInformationMessageQueue();
// Act
var purgeCount = 0;
var dequeuedItemCount = 0;
var enqueuedItemCount = 0;
var thread1 = new Task(
() =>
{
foreach (var item in itemPool)
{
queue.Enqueue(new SystemInformationQueueItem(item));
enqueuedItemCount++;
}
});
var thread2 = new Task(
() =>
{
while (!queue.IsEmpty())
{
purgeCount++;
dequeuedItemCount += queue.PurgeAllItems().Count();
int millisecondsToWaitBeforeNextItemIsQueued = TestUtilities.GetRandNumber(50, 100);
Thread.Sleep(millisecondsToWaitBeforeNextItemIsQueued);
}
});
var stopWatch = new Stopwatch();
stopWatch.Start();
thread1.Start();
thread2.Start();
Task.WaitAll(thread1, thread2);
stopWatch.Stop();
// Assert
Console.WriteLine(
"Enqueuing {0} items while another thread purged the queue took {1} milliseconds. The queue has been purged {2} time(s) during this time.",
enqueuedItemCount,
stopWatch.ElapsedMilliseconds,
purgeCount);
Assert.AreEqual(enqueuedItemCount, dequeuedItemCount);
Assert.IsTrue(queue.IsEmpty());
}
public void PurgeAllItems_OnNonEmptyQueue_QueueIsEmptyAfterwards()
{
// Arrange
var queue = new SystemInformationMessageQueue();
queue.Enqueue(new SystemInformationQueueItem(new SystemInformation()));
// Act
queue.PurgeAllItems();
// Assert
Assert.IsTrue(queue.IsEmpty());
}
public void PurgeAllItems_QueueContainsThreeItems_ResultIsArrayWithThreeItems()
{
// Arrange
var queue = new SystemInformationMessageQueue();
var items = new[]
{
new SystemInformation { MachineName = "1", Timestamp = DateTime.UtcNow },
new SystemInformation { MachineName = "2", Timestamp = DateTime.UtcNow },
new SystemInformation { MachineName = "3", Timestamp = DateTime.UtcNow }
};
foreach (var item in items)
{
queue.Enqueue(new SystemInformationQueueItem(item));
}
// Act
var result = queue.PurgeAllItems();
// Assert
Assert.AreEqual(items.Length, result.Length);
}
public void PurgeAllItems_QueueContainsThreeItems_ResultIsArrayHasTheSameOrderAsTheQueue()
{
// Arrange
var queue = new SystemInformationMessageQueue();
var items = new[]
{
new SystemInformation { MachineName = "1", Timestamp = DateTime.UtcNow },
new SystemInformation { MachineName = "2", Timestamp = DateTime.UtcNow },
new SystemInformation { MachineName = "3", Timestamp = DateTime.UtcNow }
};
foreach (var item in items)
{
queue.Enqueue(new SystemInformationQueueItem(item));
}
// Act
var result = queue.PurgeAllItems();
// Assert
for (int i = 0; i < result.Length; i++)
{
Assert.AreEqual(items[i], result[i].Item);
}
}
public void PurgeAllItems_OnNonEmptyQueue_QueueIsEmptyAfterwards()
{
// Arrange
var queue = new SystemInformationMessageQueue();
queue.Enqueue(new SystemInformationQueueItem(new SystemInformation()));
// Act
queue.PurgeAllItems();
// Assert
Assert.IsTrue(queue.IsEmpty());
}
public void PurgeAllItems_OnEmptyQueue_ResultIsEmptyArray()
{
// Arrange
var queue = new SystemInformationMessageQueue();
// Act
var results = queue.PurgeAllItems();
// Assert
Assert.IsEmpty(results);
}
public void PurgeQueueWhileEnqueuing_AllItemsThatAreEnqueuedAreAlsoDequeued()
{
// Arrange
var itemPoolSize = 10000000;
var itemPool = TestUtilities.GetSystemInformationObjects(itemPoolSize);
var queue = new SystemInformationMessageQueue();
// Act
var purgeCount = 0;
var dequeuedItemCount = 0;
var enqueuedItemCount = 0;
var thread1 = new Task(
() =>
{
foreach (var item in itemPool)
{
queue.Enqueue(new SystemInformationQueueItem(item));
enqueuedItemCount++;
}
});
var thread2 = new Task(
() =>
{
while (!queue.IsEmpty())
{
purgeCount++;
dequeuedItemCount += queue.PurgeAllItems().Count();
int millisecondsToWaitBeforeNextItemIsQueued = TestUtilities.GetRandNumber(50, 100);
Thread.Sleep(millisecondsToWaitBeforeNextItemIsQueued);
}
});
var stopWatch = new Stopwatch();
stopWatch.Start();
thread1.Start();
thread2.Start();
Task.WaitAll(thread1, thread2);
stopWatch.Stop();
// Assert
Console.WriteLine(
"Enqueuing {0} items while another thread purged the queue took {1} milliseconds. The queue has been purged {2} time(s) during this time.",
enqueuedItemCount,
stopWatch.ElapsedMilliseconds,
purgeCount);
Assert.AreEqual(enqueuedItemCount, dequeuedItemCount);
Assert.IsTrue(queue.IsEmpty());
}