Constants in Unit Testing

ShowUserController.java

@Controller
public class ShowUserController {
    public static final String SUCCESS_VIEW = "showUser";  // Key Constant (moved here from the test class)

    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView showUser(@PathVariable long userId) {
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName(SUCCESS_VIEW);
        modelAndView.setModel(buildModel(userId));

        return modelAndView;
    }

    private UserValueObject buildModel(long userId) {
      // creating the value object for presentation in here
    }
}