// The following method is executed in the Main() method which is located in the TestExecution class
public static void CallHistoryTest()
{
GSM myGSM = new GSM("Galaxy Note III", "Samsung"); // Initialize a new phone
myGSM.AddCall(DateTime.Now.AddSeconds(8432), "0888123456", 36); // Stuff it's call history with entries
myGSM.AddCall(DateTime.Now.AddSeconds(12415), "+359888123456", 511);
myGSM.AddCall(DateTime.Now.AddSeconds(22425), "0877123456", 14);
myGSM.AddCall(DateTime.Now.AddSeconds(29434), "+359888123456", 643);
myGSM.AddCall(DateTime.Now.AddSeconds(42213), "0899123456", 186);
myGSM.AddCall(DateTime.Now.AddSeconds(52411), "+359888123456", 152);
myGSM.DisplayCallHistory(); // Display the call history
Console.WriteLine();
Console.WriteLine("Price: {0:f2}", myGSM.TotalPrice(.37)); // Display the price for all the entries
Console.WriteLine();
myGSM.DeleteCall(FindIndexOfLongestCall(myGSM)); // Remove the entry at the index where the longest call is kept
myGSM.DisplayCallHistory();
Console.WriteLine();
Console.WriteLine("Price: {0:f2}", myGSM.TotalPrice(.37)); // Display the price for the entries that remain
Console.WriteLine();
myGSM.ClearHistory(); // Clear the history
myGSM.DisplayCallHistory();
Console.WriteLine();
Console.WriteLine("Price: {0:f2}", myGSM.TotalPrice(.37));
Console.WriteLine();
}