static void Main() { // Test here //GSMTest gsmTest = new GSMTest(); //Console.WriteLine(gsmTest.TestMobilePhoneCreation()); GSMCallHistoryTest callTest = new GSMCallHistoryTest(); Console.WriteLine(callTest.TestCallsAdding()); GSMCallFixedPrice callPrice = new GSMCallFixedPrice(); Console.WriteLine(callPrice.CalculatePrice()); }