public void TestMethod6()
        {
            //arrange

            Employee e1 = new Employee("12348501236","Jelena", "Cvitanović", "Indirektna prodaja", "0989036876", "*****@*****.**");
            Employee e2 = new Employee("", "Pero", "Perić", "Financije", "0977253426", "*****@*****.**");
            City city = new City("Zagreb", "Croatia");
            City city2 = new City("Ljubljana", "Slovenia");
            e1.removeAllTrips();
            e2.removeAllTrips();
            Vehicle v = new Vehicle(VehicleType.car, "Toyota", 2, 7, city);
            VehicleRepository.GetInstance().RemoveAllVehicles();
            VehicleRepository.GetInstance().AddNewVehicle(v);

            Trip t = new Trip(e1, v, DateTime.Today, city, city2, 100);
            t.addTraveller(e2);
            TripStops stop1 = new TripStops(new City("Karlovac", "Croatia"), DateTime.Today, 4);
            t.addStop(stop1);

            //act

            int check = t.Stops.Count();

            //assert

            Assert.AreEqual(2, check, "Nesipravno bilježnjenje rute");
        }
        public void TestMethod5()
        {
            //arrange

            Employee e1 = new Employee("12348501236","Jelena", "Cvitanović", "Indirektna prodaja", "0989036876", "*****@*****.**");
            Employee e2 = new Employee("","Pero", "Perić", "Financije", "0977253426", "*****@*****.**");
            City city = new City("Zagreb", "Croatia");
            City city2 = new City("Ljubljana", "Slovenia");
            e1.removeAllTrips();
            e2.removeAllTrips();
            Vehicle v = new Vehicle(VehicleType.car, "Toyota", 2, 7, city);

            VehicleRepository.GetInstance().RemoveAllVehicles();
            VehicleRepository.GetInstance().AddNewVehicle(v);

            Trip t = new Trip(e1, v, DateTime.Today, city, city2, 100);
            t.addTraveller(e2);

            //act

            int check = e2.ParticipatedTripList.Count();
            int check2 = e2.InitiatedTripList.Count();

            //assert

            Assert.AreEqual(1, check, "Nesipravno bilježnjenje putovanja na kojem je zaposlenik sudjelovao");
            Assert.AreEqual(0, check2, "Nesipravno bilježnjenje putovanja koje je zaposlenik inicirao");
        }