public static  void main(String[] args) 
{
        TestRunner.run(BackedListTest.class);
}

 protected  void mutate(Element element) throws Exception 
{
        DocumentFactory factory = DocumentFactory.getInstance();
        List list = element.elements();
        list.add(factory.createElement("last"));
        list.add(0, factory.createElement("first"));
        List list2 = element.elements();
        assertTrue("Both lists should contain same number of elements", list
                .size() == list2.size());
        XMLWriter writer = new XMLWriter(System.out);
        log("Element content is now: " + element.content());
        writer.write(element);
}

 public  void testAddRemove() throws Exception 
{
        Element parentElement = (Element) document.selectSingleNode("/root");
        List children = parentElement.elements();
        int lastPos = children.size() - 1;
        Element child = (Element) children.get(lastPos);
        try {
            // should throw an exception cause we cannot add same child twice
            children.add(0, child);
            fail();
        } catch (IllegalAddException e) {
        }
}

 public  void testAddWithIndex() throws Exception 
{
        DocumentFactory factory = DocumentFactory.getInstance();
        Element root = (Element) document.selectSingleNode("/root");
        List children = root.elements(); // return a list of 2 author
        // elements
        assertEquals(2, children.size());
        children.add(1, factory.createElement("dummy1"));
        children = root.elements();
        assertEquals(3, children.size());
        children = root.elements("author");
        assertEquals(2, children.size());
        children.add(1, factory.createElement("dummy2"));
        children = root.elements();
        assertEquals(4, children.size());
        assertEquals("dummy1", ((Node) children.get(1)).getName());
        assertEquals("dummy2", ((Node) children.get(2)).getName());
        /*
         * Some tests for issue reported at http://tinyurl.com/4jxrc
         */
        children.add(children.size(), factory.createElement("dummy3"));
        children = root.elements("author");
        children.add(children.size(), factory.createElement("dummy4"));
}

 public  void testXPaths() throws Exception 
{
        Element element = (Element) document.selectSingleNode("/root");
        mutate(element);
        element = (Element) document.selectSingleNode("//author");
        mutate(element);
}