public static void CallHistoryTest() { GSM testGSM = new GSM("Optimus L5", "LG", 242, "n/a", new Battery("n/a", 900, 10, BatteryType.LiIon), new Display(4, "16M")); testGSM.AddCall(new Call("+359898111111", 60)); testGSM.AddCall(new Call("+359888222222", 150)); }