public void TestLoadedLifo()
        {
            LifoQueue <string> lifoQueue = new LifoQueue <string>();

            lifoQueue.Push("element");
            Assert.False(lifoQueue.IsEmpty());
        }
        public void TestClearQueue()
        {
            LifoQueue <string> lifoQueue = new LifoQueue <string>();

            lifoQueue.Push("One-Elemement");
            lifoQueue.Clear();
            Assert.True(lifoQueue.IsEmpty());
        }
        public void TestEmptyLifo()
        {
            LifoQueue <string> lifoQueue = new LifoQueue <string>();

            Assert.True(lifoQueue.IsEmpty());
        }