### Question:
DecisionComponentsItem { public void show() { HiddenHelper.show(getView().getElement()); } @Inject  DecisionComponentsItem(final View view); @PostConstruct void init(); View getView(); void setDecisionComponent(final DecisionComponent decisionComponent); void show(); void hide(); DRGElement getDrgElement();  }### Answer:
@Test public void testShow() { final HTMLElement viewElement = mock(HTMLElement.class); when(view.getElement()).thenReturn(viewElement); viewElement.classList = mock(DOMTokenList.class); item.show(); verify(viewElement.classList).remove(HIDDEN_CSS_CLASS); }