### Question:
AddSpannerController { @RequestMapping(value = CONTROLLER_URL, method = RequestMethod.GET) public ModelAndView displayPage() { SpannerForm newSpanner = new SpannerForm(); return new ModelAndView(VIEW_ADD_SPANNER, MODEL_SPANNER, newSpanner); }  @RequestMapping(value = CONTROLLER_URL, method = RequestMethod.GET) ModelAndView displayPage(); @RequestMapping(value = CONTROLLER_URL, method = RequestMethod.POST) ModelAndView addSpanner(@Valid @ModelAttribute(MODEL_SPANNER) SpannerForm formData, BindingResult validationResult, Principal principal); static final String CONTROLLER_URL; static final String VIEW_ADD_SPANNER; static final String VIEW_SUCCESS; static final String VIEW_VALIDATION_FAIL; static final String MODEL_SPANNER; }### Answer:
@Test public void testPageDisplay() { ModelAndView response = controller.displayPage(); assertNotNull("no response", response); assertEquals("view", VIEW_ADD_SPANNER, response.getViewName()); }