public static void CallHistoryTest()
{
//Create an instance of the GSM class.
GSM myGsm = GSM.IPhone4S;
//Add few calls.
Call someCall = new Call(DateTime.Now, 120, "+359888888888");
myGsm.AddCall(someCall);
myGsm.AddCall(someCall);
myGsm.DeleteCall(someCall);
myGsm.AddCall(someCall);
myGsm.AddCall(new Call(new DateTime(2013, 2, 10, 21, 14, 29), 1000, "0885088508"));
myGsm.AddCall(new Call(new DateTime(2013, 1, 20, 11, 11, 11), 1000, "0885088508"));
myGsm.AddCall(new Call(DateTime.Now, 119, "+359887121314"));
//Display the information about the calls.
Console.WriteLine("All calls:");
myGsm.PrintAllCalls();
//Assuming that the price per minute is 0.37 calculate and print the total price of the calls in the history.
PrintCallPrice(myGsm);
//Remove the longest call from the history and calculate the total price again.
myGsm.RemoveLongestDurationCall();
Console.WriteLine("\nAfter remove of longest duration call...");
PrintCallPrice(myGsm);
//Finally clear the call history and print it.
myGsm.ClearCallHistory();
Console.WriteLine("\nAfter clear...");
myGsm.PrintAllCalls();
PrintCallPrice(myGsm);
}
