public void EnqueueDequeueTest(IPersistentQueue <int> empty)
{
int count = 100;
IEnumerable <int> items = Enumerable.Range(0, count);
IPersistentQueue <int> queue = empty;
foreach (int item in items)
{
int countBefore = queue.Count;
queue = queue.Enqueue(item);
Assert.Equal(countBefore + 1, queue.Count);
(int head, IPersistentQueue <int> tail) = queue.Dequeue();
Assert.Equal(items.First(), head);
Assert.Equal(countBefore, tail.Count);
}
foreach (int item in items)
{
int countBefore = queue.Count;
int head;
(head, queue) = queue.Dequeue();
Assert.Equal(item, head);
}
CheckEmptyBehaviour(queue);
}
public void EnumeratorTest()
{
int count = 100;
IEnumerable <int> items = Enumerable.Range(0, count);
IPersistentQueue <int> queue = PersistentQueue <int> .Empty;
foreach (int item in items)
{
queue = queue.Enqueue(item);
}
foreach (IEnumerator enumerator in
new IEnumerator[] { queue.GetEnumerator(), ((IEnumerable)queue).GetEnumerator() })
{
foreach (int item in items)
{
Assert.True(enumerator.MoveNext());
Assert.Equal(item, enumerator.Current);
}
Assert.False(enumerator.MoveNext());
}
}
public void EmptyQueueTest(IPersistentQueue <int> empty)
{
CheckEmptyBehaviour(empty);
Assert.NotSame(empty, empty.Enqueue(1));
}