### Question:
ZkTreeNode extends DefaultTreeNode<E> { public ZkTreeNode<E> select() { getModel().addToSelection(this); return this; } ZkTreeNode(E data, TreeNode<E>... children);  ZkTreeNode(E data, Collection<? extends TreeNode<E>> children);  ZkTreeNode(E data); ZkTreeNode<E> moveTo(@Nonnull TreeNode<E> destinationNode); ZkTreeNode<E> select();  }### Answer:
@Test public void testSelect() { sut.select(); sut.getModel().isSelected(sut); }