QueueTest.Basic C# (CSharp) Method

    public void Basic()
    {
        var q = Queue<int>.Empty;
        q.Count.AssertEquals(0);

        q = q.Enqueue(5);
        q.Count.AssertEquals(1);
        q.Peek().AssertEquals(5);

        q = q.Enqueue(6);
        q.Count.AssertEquals(2);
        q.Peek().AssertEquals(5);

        q = q.Dequeue();
        q.Count.AssertEquals(1);
        q.Peek().AssertEquals(6);

        q = q.Dequeue();
        q.Count.AssertEquals(0);
    }