1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package org.w3c.dom;

    25 

    26 import java.io.ByteArrayInputStream;

    27 

    28 import javax.xml.parsers.DocumentBuilder;

    29 import javax.xml.parsers.DocumentBuilderFactory;

    30 import javax.xml.xpath.XPath;

    31 import javax.xml.xpath.XPathConstants;

    32 import javax.xml.xpath.XPathExpression;

    33 import javax.xml.xpath.XPathFactory;

    34 

    35 import org.testng.Assert;

    36 import org.testng.annotations.Test;

    37 

    38 /*

    39  * @bug 6333993

    40  * @summary Test NodeList.item(valid index) returns value after NodeList.item(NodeList.getLength()).

    41  */

    42 public class CR6333993Test {

    43 

    44     @Test

    45     public void testNodeList() {

    46         int n = 5;

    47         while (0 != (n--))

    48             ;

    49         System.out.println("n=" + n);

    50         try {

    51             String testXML = "<root>" + "  <node/>" + "  <node/>" + "  <node/>" + "  <node/>" + "</root>\n";

    52             DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

    53             // dbf.setNamespaceAware(true);

    54             DocumentBuilder builder = dbf.newDocumentBuilder();

    55             ByteArrayInputStream bis = new ByteArrayInputStream(testXML.getBytes());

    56             Document testDoc = builder.parse(bis);

    57             XPathFactory xpathFactory = XPathFactory.newInstance();

    58             XPath xpath = xpathFactory.newXPath();

    59             XPathExpression expr = xpath.compile("/root/node");

    60             NodeList testNodes = (NodeList) expr.evaluate(testDoc, XPathConstants.NODESET);

    61             // Node list appears to work correctly

    62             System.out.println("testNodes.getLength() = " + testNodes.getLength());

    63             System.out.println("testNodes[0] = " + testNodes.item(0));

    64             System.out.println("testNodes[0] = " + testNodes.item(0));

    65             System.out.println("testNodes.getLength() = " + testNodes.getLength());

    66             // Access past the end of the NodeList correctly returns null

    67             System.out.println("testNodes[testNodes.getLength()] = " + testNodes.item(testNodes.getLength()));

    68             // BUG! First access of valid node after accessing past the end

    69             // incorrectly returns null

    70             if (testNodes.item(0) == null) {

    71                 System.out.println("testNodes[0] = null");

    72                 Assert.fail("First access of valid node after accessing past the end incorrectly returns null");

    73             }

    74             // Subsequent access of valid node correctly returns the node

    75             System.out.println("testNodes[0] = " + testNodes.item(0));

    76         } catch (Exception ex) {

    77             ex.printStackTrace();

    78         }

    79 

    80     }

    81 

    82 }