public static void TestCallHistory()
{
var battery = new Battery("Moqta firma za baterii", "Moqt model bateriq", 100, 150, BatteryType.LiIon);
var display = new Display("Moqta firma za displejove", "Moqt model display", 5.6, "1900 x 600");
var gsm = new GSM("Moqta firma", "Moqt model", battery, display, "Az sym owner", 1900);
for (int i = 0; i < 10; i++)
{
gsm.AddCall(new Call(DateTime.Now.ToString(), i, "087830" + i));
}
gsm.RemoveLastCall();
Console.WriteLine(gsm.CallBill(1));
gsm.ClearCallHistory();
Console.WriteLine(gsm.CallBill(1));
}