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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package javax.xml.xpath.ptests;

import static org.testng.Assert.assertEquals;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.testng.annotations.BeforeTest;
import org.testng.annotations.Listeners;
import org.testng.annotations.Test;

/**
 * Class containing the test cases for XPathFunctionResolver.
 */
@Listeners({jaxp.library.BasePolicy.class})
public class XPathFunctionResolverTest {
    /**
     * A XPath for evaluation environment and expressions.
     */
    private XPath xpath;

    /**
     * Create XPath object before every test. Make sure function resolver has
     * been set for XPath object.
     */
    @BeforeTest
    public void setup() {
        xpath = XPathFactory.newInstance().newXPath();
        if (xpath.getXPathFunctionResolver() == null) {
            xpath.setXPathFunctionResolver((functionName,arity) -> null);
        }
    }
    /**
     * Test for resolveFunction(QName functionName,int arity). evaluate will
     * continue as long as functionName is meaningful.
     *
     * @throws XPathExpressionException If the expression cannot be evaluated.
     */
    @Test
    public void testCheckXPathFunctionResolver01() throws XPathExpressionException {
        assertEquals(xpath.evaluate("round(1.7)", (Object)null), "2");
    }

    /**
     * Test for resolveFunction(QName functionName,int arity); evaluate throws
     * NPE if functionName  is null.
     *
     * @throws XPathExpressionException If the expression cannot be evaluated.
     */
    @Test(expectedExceptions = NullPointerException.class)
    public void testCheckXPathFunctionResolver02() throws XPathExpressionException {
        assertEquals(xpath.evaluate(null, "5"), "2");
    }
}