### Question:
DecisionNavigatorTreeView implements DecisionNavigatorTreePresenter.View { Element itemsQuerySelector(final String selector) { return items.querySelector(selector); } @Inject  DecisionNavigatorTreeView(final HTMLDivElement view,
                                     final HTMLDivElement items,
                                     final ManagedInstance<TreeItem> managedInstance,
                                     final Elemental2DomUtil util); @Override void init(final DecisionNavigatorTreePresenter presenter); @Override HTMLElement getElement(); @Override void clean(); @Override void setup(final List<DecisionNavigatorItem> items); @Override void select(final String uuid); @Override void deselect();  }### Answer:
@Test public void testItemsQuerySelector() { final String selector = "selector"; treeView.itemsQuerySelector(selector); verify(items).querySelector(selector); }