public void SynchronisedMinPriorityQueueDoesNotInsertItemToHeadIfItemIsHigherPriorityThanHead()
{
var priorityQueue = new SynchronisedMinPriorityQueue <string, int>(50);
List <Tuple <string, int> > items = new List <Tuple <string, int> >
{
new Tuple <string, int>("A_50", 50),
new Tuple <string, int>("A_41", 41),
new Tuple <string, int>("A_38", 38),
new Tuple <string, int>("A_37", 37),
new Tuple <string, int>("A_23", 23),
new Tuple <string, int>("A_11", 11),
new Tuple <string, int>("A_5", 5),
new Tuple <string, int>("A_3", 3),
}.Randomize()
.ToList();
priorityQueue.EnqueueRange(items);
string originalHead = priorityQueue.Peek();
priorityQueue.Enqueue("A_4", 4);
string newHead = priorityQueue.Peek();
Assert.AreEqual("A_3", originalHead);
Assert.AreEqual("A_3", newHead);
}
public void SynchronisedMinPriorityQueueDequeueReturnsItemWithLowestPriorityMultiThread()
{
var priorityQueue = new SynchronisedMinPriorityQueue <string, int>(50);
List <Tuple <string, int> > items = new List <Tuple <string, int> >
{
new Tuple <string, int>("A_50", 50),
new Tuple <string, int>("A_41", 41),
new Tuple <string, int>("A_38", 38),
new Tuple <string, int>("A_37", 37),
new Tuple <string, int>("A_23", 23),
new Tuple <string, int>("A_11", 11),
new Tuple <string, int>("A_5", 5),
new Tuple <string, int>("A_3", 3),
}.Randomize()
.ToList();
List <Task> tasks = new List <Task>();
items.ForEach(i => tasks.Add(Task.Factory.StartNew(() => priorityQueue.Enqueue(i.Item1, i.Item2))));
Task.WaitAll(tasks.ToArray());
string item = priorityQueue.Dequeue();
Assert.AreEqual("A_3", item);
}
public void SynchronisedMinPriorityQueueInsertsItemInCollectionAsHeadIfItemIsLowerPriorityThanOriginalHeadMultiThreaded()
{
var priorityQueue = new SynchronisedMinPriorityQueue <string, int>(50);
List <Tuple <string, int> > items = new List <Tuple <string, int> >
{
new Tuple <string, int>("A_50", 50),
new Tuple <string, int>("A_41", 41),
new Tuple <string, int>("A_38", 38),
new Tuple <string, int>("A_37", 37),
new Tuple <string, int>("A_23", 23),
new Tuple <string, int>("A_11", 11),
new Tuple <string, int>("A_5", 5),
new Tuple <string, int>("A_3", 3),
}.Randomize()
.ToList();
List <Task> tasks = new List <Task>();
items.ForEach(i => tasks.Add(Task.Factory.StartNew(() => priorityQueue.Enqueue(i.Item1, i.Item2))));
Task.WaitAll(tasks.ToArray());
string originalHead = priorityQueue.Peek();
List <Tuple <string, int> > newItems = new List <Tuple <string, int> >
{
new Tuple <string, int>("A_2", 2),
new Tuple <string, int>("A_4", 4),
new Tuple <string, int>("A_6", 6),
new Tuple <string, int>("A_8", 8),
new Tuple <string, int>("A_10", 10),
new Tuple <string, int>("A_12", 12),
new Tuple <string, int>("A_14", 14),
new Tuple <string, int>("A_16", 16),
}.Randomize()
.ToList();
List <Task> newtasks = new List <Task>();
newItems.ForEach(i => newtasks.Add(Task.Factory.StartNew(() => priorityQueue.Enqueue(i.Item1, i.Item2))));
Task.WaitAll(newtasks.ToArray());
string newHead = priorityQueue.Peek();
Assert.AreEqual("A_3", originalHead);
Assert.AreEqual("A_2", newHead);
}
public void SynchronisedMinPriorityQueueEnqueueThrowsIfPriorityIsNull()
{
var priorityQueue = new SynchronisedMinPriorityQueue <string, TestPriority>(50);
Assert.Throws <ArgumentNullException>(() => priorityQueue.Enqueue("A_1", null as TestPriority));
}
