public async Task AddVehicleModelAsync()
{
// Arrange
_context.VehicleMakes.Add(_testModel1.Make);
await _context.SaveChangesAsync();
// Act
var vehicleModel = await _vehicleService.AddVehicleModelAsync(_testModel1);
// Assert
var vehicleModelsInDb = await _context.VehicleModels.ToListAsync();
Assert.AreEqual(1, vehicleModelsInDb.Count);
Assert.AreEqual(_testModel1.Name, vehicleModelsInDb[0].Name);
}