public void Can_Add_To_List()
        {
            //prepare
            var freeFramesList = new FreeFramesList(20);

            //action
            freeFramesList.AddToList(3);
            freeFramesList.AddToList(6);
            freeFramesList.AddToList(2);

            //assertion
            Assert.AreEqual(freeFramesList.FreeFramesCount, 23);
        }
        public void Can_Remove_From_List()
        {
            //prepare
            var freeFramesList = new FreeFramesList(30);

            //action
            freeFramesList.RemoveFromList();
            freeFramesList.RemoveFromList();
            freeFramesList.RemoveFromList();

            //assertion
            Assert.AreEqual(freeFramesList.FreeFramesCount, 27);
        }