@Before
public void setUp() {
MockitoAnnotations.initMocks(this);
numberSlot = new Slot("id-2", "number-slot", DataType.NUMBER);
resources = new DefaultResourceSet();
underTest = spy(new DefaultVisualItem(VIEW_ITEM_ID, resources,
resolverContext, mock(VisualItemInteractionHandler.class)));
when(resolverContext.getResolver(numberSlot)).thenReturn(resolver);