public void FillGarageTest()
        {
            var garageHandler = new Uppgift5_Ludvig_Baummann_Olsson.GarageHandler();

            garageHandler.CreateGarage(4);
            garageHandler.FillGarage();
            Assert.IsNotNull(garageHandler.FindVehicleRegNo("ABC123"));
            Assert.IsNotNull(garageHandler.FindVehicleRegNo("DEF456"));
            Assert.IsNotNull(garageHandler.FindVehicleRegNo("GHJ789"));
            Assert.IsNotNull(garageHandler.FindVehicleRegNo("KLM321"));
        }
        public void FindVehicleTest()
        {
            var garageHandler = new Uppgift5_Ludvig_Baummann_Olsson.GarageHandler();

            garageHandler.CreateGarage(1);
            Assert.IsTrue(garageHandler.AddVehicle(new Uppgift5_Ludvig_Baummann_Olsson.Vehicle("ABC123", "Red", 4)));
            Assert.IsNotNull(garageHandler.FindVehicleRegNo("ABC123"));
        }