import java.util.List;

import org.w3c.dom.DocumentFragment;

    public void testAppendChildElement() throws Exception {

        Document doc = XMLUtil.parse(new InputSource(new StringReader("<root></root>")), false, true, null, null);

        Element parent = doc.createElementNS("unittest", "parent");

        Element newElement1 = doc.createElementNS("unittest", "new_element1");

        Element newElement2 = doc.createElementNS("unittest", "new_element2");

        XMLUtil.appendChildElement(parent, newElement1, new String[] { "new_element2", "new_element1" });

        NodeList children = parent.getChildNodes();

        assertEquals(1, children.getLength());

        XMLUtil.appendChildElement(parent, newElement2, new String[] { "new_element2", "new_element1" });

        children = parent.getChildNodes();

        assertEquals(2, children.getLength());

        Node firstChild = parent.getChildNodes().item(0);

        Node secondChild = parent.getChildNodes().item(1);

        assertEquals("new_element2", firstChild.getNodeName());

        assertEquals("new_element1", secondChild.getNodeName());

    }

    public void testFindSubElements() throws Exception {

        Document doc = XMLUtil.parse(new InputSource(new StringReader("<root> <child1></child1><child2/><!-- comment --><child3/></root>")),

                false, true, null, null);

        Element parent = doc.getDocumentElement();

        assertEquals(5, parent.getChildNodes().getLength());

        List<Element> subElements = XMLUtil.findSubElements(parent);

        assertEquals(3, subElements.size());

        Element firstChild = subElements.get(0);

        Element secondChild = subElements.get(1);

        Element thirdChild = subElements.get(2);

        assertEquals("child1", firstChild.getNodeName());

        assertEquals("child2", secondChild.getNodeName());

        assertEquals("child3", thirdChild.getNodeName());

        Document failureDoc = XMLUtil.parse(new InputSource(new StringReader("<root>Non whitespace<!-- comment --></root>")),

            false, true, null, null);

        Element failedParent = failureDoc.getDocumentElement();

        try {

            XMLUtil.findSubElements(failedParent);

            fail("expected IAE");

        } catch (IllegalArgumentException e) { }

    }

    public void testFindElement() throws Exception {

        String xmlDoc = "<root> " +

                        " <h:table xmlns:h=\"http://www.w3.org/TR/html4/\">" +

                        " </h:table>" +

                        " <f:table xmlns:f=\"http://www.w3schools.com/furniture\">" +

                        " </f:table>" +

                        " <dup/><dup/>" +

                        "</root>";

        Document doc = XMLUtil.parse(new InputSource(new StringReader(xmlDoc)), false, true, null, null);

        Element parent = doc.getDocumentElement();

        Element noTable1 = XMLUtil.findElement(parent, "table", null);

        assertNull(noTable1);

        Element noTable2 = XMLUtil.findElement(parent, "table", "h");

        assertNull(noTable2);

        Element noTable3 = XMLUtil.findElement(parent, "table", "f");

        assertNull(noTable3);

        Element table1 = XMLUtil.findElement(parent, "table", "http://www.w3.org/TR/html4/");

        assertNotNull(table1);

        Element table2 = XMLUtil.findElement(parent, "table", "http://www.w3schools.com/furniture");

        assertNotNull(table2);

        try {

            XMLUtil.findElement(parent, "dup", null);

            fail("Expected IAE");

        } catch (IllegalArgumentException e) { }

    }

    public void testFindText() throws Exception {

        Document doc = XMLUtil.parse(new InputSource(new StringReader("<root>Text To Find<child></child></root>")),

                false, true, null, null);

        Element parent = doc.getDocumentElement();

        String foundText = XMLUtil.findText(parent);

        assertEquals("Text To Find", foundText);

        String notFoundText = XMLUtil.findText(parent.getFirstChild());

        assertNull(notFoundText);

    }

    public void testTranslateXML() throws Exception {

        // don't add any whitespace to the first 3 nodes

        String xmlDoc = "<root><table bgcolor='red'><tr>" +

                        "   <td>Apples</td>" +

                        "   <td>Bananas</td>" +

                        "  </tr>" +

                        " </table>" +

                        "</root>";

        Document doc = XMLUtil.parse(new InputSource(new StringReader(xmlDoc)), false, true, null, null);

        Element parent = doc.getDocumentElement();

        Element translated = XMLUtil.translateXML((Element) parent.getFirstChild(), "http://www.w3.org/TR/html4/");

        assertEquals("http://www.w3.org/TR/html4/", translated.getNamespaceURI());

        assertEquals(1, translated.getAttributes().getLength());

        assertEquals("http://www.w3.org/TR/html4/", translated.getFirstChild().getNamespaceURI());

        assertEquals(0, translated.getFirstChild().getAttributes().getLength());

    }

    public void testCopyDocument() throws Exception {

        String srcXml = "<root><table bgcolor='red'><tr>" +

                        "   <td>Apples</td>" +

                        "   <td>Bananas</td>" +

                        "  </tr>" +

                        " </table>" +

                        "</root>";

        Document srcDoc = XMLUtil.parse(new InputSource(new StringReader(srcXml)), false, true, null, null);

        Element srcRoot = srcDoc.getDocumentElement();

        Document dstDoc = XMLUtil.parse(new InputSource(new StringReader("<dst_root/>")), false, true, null, null);

        Element dstRoot = dstDoc.getDocumentElement();

        XMLUtil.copyDocument(dstDoc, srcRoot, dstRoot, "http://www.w3.org/TR/html4/");

//        XMLUtil.write(dstDoc, System.out, "UTF-8");

        assertEquals(1, dstDoc.getChildNodes().getLength());

        Element root = dstDoc.getDocumentElement();

        Element firstChild = (Element) root.getFirstChild();

        assertEquals("table", firstChild.getNodeName());

        assertEquals("http://www.w3.org/TR/html4/", firstChild.getNamespaceURI());

        assertEquals(1, firstChild.getAttributes().getLength());

    }