public void Delete_HeadTail_02()
{
var hashq = new HashQueue <int>();
Assert.AreEqual(0, hashq.Count());
hashq.Enqueue(1);
Assert.AreEqual(1, hashq.Peek());
Assert.AreEqual(1, hashq.PeekTail());
hashq.Delete(1);
Assert.IsTrue(hashq.IsEmpty());
}
public void Delete_ReEnqueue_03()
{
var hashq = new HashQueue <int>();
Assert.AreEqual(0, hashq.Count());
hashq.Enqueue(1);
Assert.AreEqual(1, hashq.Count());
hashq.Delete(1);
Assert.AreEqual(0, hashq.Count());
hashq.Enqueue(1);
Assert.AreEqual(1, hashq.Count());
}
public void Delete_Between_01()
{
var hashq = new HashQueue <int>();
Assert.AreEqual(0, hashq.Count());
hashq.Enqueue(1);
hashq.Enqueue(2);
hashq.Enqueue(3);
Assert.AreEqual(1, hashq.Peek());
Assert.AreEqual(3, hashq.PeekTail());
hashq.Delete(2);
Assert.AreEqual(1, hashq.Peek());
Assert.AreEqual(3, hashq.PeekTail());
}
public void Delete_DuplicateHashCode_04()
{
var person1 = new Person()
{
Name = "p1", Age = 1
};
var person2 = new Person()
{
Name = "p1", Age = 2
};
Assert.AreEqual(person1.GetHashCode(), person2.GetHashCode());
Assert.AreNotEqual(person1, person2);
var hashq = new HashQueue <Person>();
Assert.AreEqual(0, hashq.Count());
hashq.Enqueue(person1);
hashq.Enqueue(person2);
Assert.AreEqual(2, hashq.Count());
Assert.IsTrue(hashq.Delete(person2));
Assert.AreEqual(1, hashq.Count());
Assert.AreSame(person1, hashq.Peek());
}
public void Find01()
{
var count = 1000000;
var sw = new Stopwatch();
var hashq = new HashQueue <int>();
for (int i = 0; i < count; i++)
{
hashq.Enqueue(i);
}
sw.Start();
Assert.IsTrue(hashq.Delete(count - 1));
sw.Stop();
var hashqTime = sw.ElapsedMilliseconds;
Console.WriteLine($"hashqTime: {hashqTime}");
sw.Reset();
var q = new Queue <int>();
for (int i = 0; i < count; i++)
{
q.Enqueue(i);
}
sw.Start();
// Queue<T>.Remove(x) and Where(x) are O(n).
q.Where(x => x == count - 1).ToList();
sw.Stop();
var qTime = sw.ElapsedMilliseconds;
Console.WriteLine($"qTime: {qTime}");
Assert.Less(hashqTime, qTime);
Assert.Less(hashqTime, 10);
}
