public void testChildren() {
   Node[] children = XMLTools.children(this.rootNode);
   assertEquals(4, children.length);
   for (int i = 1; i < 4; i++) {
     assertEquals("element-" + i, children[i].getNodeName());
   }
 }
 public void testChildrenNamed() {
   Node element2Node = XMLTools.child(this.rootNode, "element-2");
   Node[] children = XMLTools.children(element2Node, "element-2.0");
   assertEquals(3, children.length);
   for (int i = 0; i < children.length; i++) {
     assertEquals("element-2.0", children[i].getNodeName());
   }
 }