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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

package javax.xml.xpath.ptests;

import static org.testng.Assert.assertEquals;

import javax.xml.testutils.TestBase;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathFunctionResolver;

import org.testng.annotations.Test;

/**
 * Class containing the test cases for XPathFunctionResolver.
 */
public class XPathFunctionResolver01 extends TestBase {

    /**
     * Test for resolveFunction(QName functionName,int arity). If functionName
     * or arity is null, then a NullPointerException is thrown.
     * 
     */
    @Test
    public void testCheckXPathFunctionResolver01() {
        try {
            XPathFactory xpathFactory = XPathFactory.newInstance();
            XPath xpath = xpathFactory.newXPath();
            XPathFunctionResolver xpathFunctionResolver = xpath.getXPathFunctionResolver();
            if (xpathFunctionResolver == null) {
                System.out.println("xpathFunctionResolver is null , so creating and setting new MyXPathFunctionResolver ");
                xpath.setXPathFunctionResolver((q, i) -> {
                    return null;
                });
            }
            String result = xpath.evaluate("round(1.7)", (Object) null);
            assertEquals(result, "2");
        } catch (XPathExpressionException e) {
            fail(e);
        }
    }
}