public static void CallHistoryTestPrint()
{
var myPhone = new Gsm(
"THL", "China", "Niki", 200.5M, new Battery(BatteryType.Li_Ion, 60, 20), new Display(5.5M, 16000000));
Console.WriteLine(myPhone);
myPhone.AddCall(DateTime.Now, 0885998877, 65);
myPhone.AddCall(DateTime.UtcNow, 0885665544, 98);
myPhone.AddCall(DateTime.Now, 0885552277, 158);
myPhone.AddCall(DateTime.Now, 0885996857, 112);
myPhone.AddCall(DateTime.Now, 0885995827, 87);
Console.WriteLine(myPhone.CallHistory);
var priceInfo = new StringBuilder();
priceInfo.AppendFormat("Total price: {0:C2}", myPhone.CallPrice());
myPhone.RemoveLongestCall();
priceInfo.AppendFormat(Environment.NewLine);
priceInfo.AppendFormat("Longest Call removed");
priceInfo.AppendFormat(Environment.NewLine);
priceInfo.AppendFormat("Total price: {0:C2}", myPhone.CallPrice());
myPhone.ClearCallHistory();
Console.WriteLine(priceInfo);
Console.WriteLine(myPhone.CallHistory);
}