public void AdjustPriority_ChangesOrder()
{
// Create a bunch of TestQueueItems and enqueue them.
var items = Enumerable.Range(1, 14)
.Select(val => new TestQueueItem()
{
Value = val
})
.ToList();
var queue = new IndexedIntrinsicPriorityQueue <TestQueueItem>(TestQueueItem.IsLessThan);
foreach (var item in items)
{
queue.Enqueue(item);
}
// Change some of the values, letting the queue know each time.
items[5].Value = 22;
queue.AdjustPriority(items[5]);
items[12].Value = 3;
queue.AdjustPriority(items[12]);
// Make a list of the values from the items, sorted according to LINQ.
var valsSortedExternally = items.Select(item => item.Value)
.OrderBy(val => val)
.ToList();
// Make a list of the values from the items, sorted according to the queue.
var valsSortedByQueue = new List <int>();
while (queue.Count != 0)
{
valsSortedByQueue.Add(queue.Dequeue().Value);
}
CollectionAssert.AreEqual(valsSortedExternally, valsSortedByQueue);
}
public void Dequeue_ItemsInOrder(int[] inputVals)
{
var sortedInputVals = inputVals.OrderBy(val => val).ToArray();
var queue = new IndexedIntrinsicPriorityQueue <TestQueueItem>(TestQueueItem.IsLessThan);
foreach (var val in inputVals)
{
queue.Enqueue(new TestQueueItem()
{
Value = val
});
}
var dequeuedVals = new List <int>();
while (queue.Count != 0)
{
dequeuedVals.Add(queue.Dequeue().Value);
}
CollectionAssert.AreEqual(sortedInputVals, dequeuedVals);
}
public void Dequeue_ThrowsIfEmpty()
{
var queue = new IndexedIntrinsicPriorityQueue <TestQueueItem>(TestQueueItem.IsLessThan);
Assert.ThrowsException <InvalidOperationException>(() => queue.Dequeue());
}