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

            garageHandler.CreateGarage(2);
            Assert.IsTrue(garageHandler.AddVehicle(new Uppgift5_Ludvig_Baummann_Olsson.Vehicle("ABC123", "Red", 4)));
            Assert.IsTrue(garageHandler.AddVehicle(new Uppgift5_Ludvig_Baummann_Olsson.Vehicle("DEF777", "Red", 4)));
            Assert.IsTrue(garageHandler.FindVehicles("color", "red").Count == 2);
        }