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8289511: Improve test coverage for XPath Axes: child
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‎test/jaxp/javax/xml/jaxp/unittest/xpath/XPathExpChildTest.java‎

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/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package xpath;
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import org.testng.Assert;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathConstants;
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import javax.xml.xpath.XPathExpressionException;
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import javax.xml.xpath.XPathFactory;
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import java.io.ByteArrayInputStream;
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import java.io.InputStream;
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/*
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* @test
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* @bug 8289511
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* @run testng/othervm xpath.XPathExpChildTest
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* @summary Tests for XPath child axis specifier.
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*/
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public class XPathExpChildTest {
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private static final String XML = """
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<store>
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<book id="1" lang="en">
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<title/>
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<author id="1"/>
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<isbn>1234</isbn>
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</book>
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<book id="2" lang="en">
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<title/>
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<author id="2"/>
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<isbn>5678</isbn>
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</book>
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</store>
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""";
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private static final String AUTHOR_1 = "author_1";
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private static final String AUTHOR_2 = "author_2";
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private static final Document doc;
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static {
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try {
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var builder =
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DocumentBuilderFactory.newInstance().newDocumentBuilder();
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InputStream s = new ByteArrayInputStream(XML.getBytes());
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doc = builder.parse(s);
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} catch (Exception e) {
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System.out.println("Exception while initializing XML document");
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throw new RuntimeException(e.getMessage());
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}
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}
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/*
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* DataProvider: provides XPath expression and expected result
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*/
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@DataProvider(name = "parameters")
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public Object[][] getXPathExpression() {
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return new Object[][]{
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// abbreviated text
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{"/store/book/author", AUTHOR_1},
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{"/child::store/child::book/child::author", AUTHOR_1},
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{"/store/child::book/author", AUTHOR_1},
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// any nodes
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{"/store/book/child::*[2]", AUTHOR_1},
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{"/store/child::*[child::author]/author", AUTHOR_1},
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{"/store/child::*[child::author][2]/author", AUTHOR_2},
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{"/store/child::node()/child::author", AUTHOR_1},
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{"/store/child::node()[child::author]/author", AUTHOR_1},
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{"/store/child::node()[child::author][2]/author", AUTHOR_2},
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// position
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{"/store/child::book[position()=1]/author", AUTHOR_1},
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{"/store/child::book[last()]/author", AUTHOR_2},
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// descendant
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{"//book/child::*[2]", AUTHOR_1},
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{"//child::*[child::author]/author", AUTHOR_1},
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{"//child::*[child::author][2]/author", AUTHOR_2},
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{"//child::node()/child::author", AUTHOR_1},
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{"//child::node()[child::author]/author", AUTHOR_1},
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{"//child::node()[child::author][2]/author", AUTHOR_2},
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// parent node
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{"//child::book/../child::book/child::author", AUTHOR_1},
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// dot reference
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{"//child::book/./child::author", AUTHOR_1},
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{"//child::node()/./child::author", AUTHOR_1},
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{"//././/./child::author", AUTHOR_1},
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// attributes
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{"/store/child::book[@id=1]/author", AUTHOR_1},
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{"/store/child::book[attribute::id=1]/author", AUTHOR_1},
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{"/store/child::book[@id]/author", AUTHOR_1},
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{"/store/child::book[@id=1][@lang='en']/author", AUTHOR_1},
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{"/store/child::book[@lang='en'][1]/author", AUTHOR_1},
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{"/store/child::book[child::isbn='1234']/author", AUTHOR_1},
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{"/store/child::book[@lang='en' and " +
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"child::isbn='1234']/author", AUTHOR_1},
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{"/store/child::*[@lang='en'][2]/author", AUTHOR_2},
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{"/store/child::node()[@id='1']/author", AUTHOR_1},
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{"/store/child::node()[@lang='en'][2]/author", AUTHOR_2},
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{"/store/child::*[child::author][child::title][@id='2']/author",
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AUTHOR_2},
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{"/store/child::*[child::author or child::ssn][@id='2']/author",
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AUTHOR_2},
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{"/store/child::*[child::*]/author", AUTHOR_1},
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{"/store/child::*[attribute::*]/author", AUTHOR_1},
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{"/store/*[*][*][*][*][*][*][*][*]/author", AUTHOR_1},
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{"/store/*[@*][@*][@*][@*][@*][@*][@*][@*]/author", AUTHOR_1},
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{"//author[@*]", AUTHOR_1},
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// text node
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{"/store/book[1]/isbn/child::text()/../../author", AUTHOR_1},
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{"/store/book/isbn[child::text()='5678']/../author", AUTHOR_2},
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{"/store/book/isbn[.='5678']/../author", AUTHOR_2},
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// count child nodes
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{"/store/book[count(./child::author)]/author", AUTHOR_1},
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{"/store/book[count(child::author)]/author", AUTHOR_1},
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{"/store/book[count(../child::book)]/author", AUTHOR_2},
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};
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}
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/*
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* DataProvider: provides XPath expressions that return zero children
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*/
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@DataProvider(name = "zeroChildrenExp")
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public Object[][] getZeroChildrenExp() {
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return new Object[][]{
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{"/store/book[3]/author"},
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{"/store/book/author/ssn"},
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{"/store/child[book]/author"},
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{"/store/child[@id='1']/book/author"},
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{"/store/child::*[@category]/author"},
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{"//author[*]/../author"},
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{"//title[@*]/../author"},
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{"/store/book[-1]/author"},
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{"/store/child:book/author"},
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{"//book[.='1']/author"},
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};
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}
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/*
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* DataProvider: provides invalid XPath expression and expected exception
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* to be thrown
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*/
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@DataProvider(name = "invalidExp")
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public Object[][] getInvalidExp() {
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return new Object[][]{
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// XPathExpressionException
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{"/store/*[child::author] and [child::title]/author",
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XPathExpressionException.class},
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{"//book[@id='en'] and book[@lang='en']/author",
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XPathExpressionException.class},
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{"/store/book[child::count()]/author",
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XPathExpressionException.class},
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{"//book[child::position()=1]", XPathExpressionException.class},
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};
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}
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/**
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* Verifies XPath child axis specifier.
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*
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* @param exp XPath expression
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* @param expected expected result
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* @throws Exception
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*/
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@Test(dataProvider = "parameters")
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void testXPathEvaluate(String exp, String expected) throws Exception {
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XPath xPath = XPathFactory.newInstance().newXPath();
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NodeList nl = (NodeList) xPath.evaluate(exp, doc,
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XPathConstants.NODESET);
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Node node = xPath.evaluateExpression(exp, doc, Node.class);
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Assert.assertEquals(nl.item(0).getNodeName(), node.getNodeName());
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Assert.assertEquals(nl.item(0).getNodeValue(), node.getNodeValue());
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Assert.assertEquals(nl.item(0).getAttributes(), node.getAttributes());
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Assert.assertEquals(node.getNodeName() + "_" +
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node.getAttributes().item(0).getNodeValue(),
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expected);
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}
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/**
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* Verifies no child nodes returned from the XPath expression.
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*
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* @param exp XPath expression
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* @throws Exception
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*/
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@Test(dataProvider = "zeroChildrenExp")
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void testZeroChildrenExp(String exp) throws Exception {
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XPath xPath = XPathFactory.newInstance().newXPath();
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Node node = xPath.evaluateExpression(exp, doc, Node.class);
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Assert.assertNull(node);
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}
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/**
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* Verifies exception thrown for invalid expression.
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*
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* @param exp XPath expression
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* @param throwableClass expected exception
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* @throws Exception
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*/
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@Test(dataProvider = "invalidExp")
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void testInvalidExp(String exp, Class throwableClass) throws Exception {
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XPath xPath = XPathFactory.newInstance().newXPath();
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Assert.assertThrows(throwableClass,
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() -> ((NodeList) xPath.evaluate(exp, doc,
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XPathConstants.NODESET)).item(0).getNodeName());
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}
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}

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