Commons JXPath example source code file (EmptyCollectionTest.java)

This example Commons JXPath source code file (EmptyCollectionTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons JXPath tags/keywords

emptycollectiontest, emptycollectiontest, haschild, haschild, jxpathtestcase, jxpathtestcase, object, object, util

The Commons JXPath EmptyCollectionTest.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.jxpath.ri.model;

import java.util.Collections;

import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.JXPathTestCase;

/**
 * Be sure empty lists/sets/arrays work.
 * @author mbenson
 * @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
 */
public class EmptyCollectionTest extends JXPathTestCase {
    public static class HasChild {
        private Object child;

        /**
         * Construct a new EmptyCollectionTest.HasChild instance.
         */
        public HasChild(Object child) {
            this.child = child;
        }

        public Object getChild() {
            return child;
        }
    }

    public void testEmptyList() {
        assertXPathPointerIterator(JXPathContext.newContext(Collections.EMPTY_LIST), "/*",
                Collections.EMPTY_LIST);
    }

    public void testEmptyArray() {
        assertXPathPointerIterator(JXPathContext.newContext(new Object[0]), "/*", list());
    }

    public void testEmptySet() {
        assertXPathPointerIterator(JXPathContext.newContext(Collections.EMPTY_SET), "/*",
                Collections.EMPTY_SET);
    }

    public void testEmptyChildList() {
        assertXPathPointerIterator(JXPathContext.newContext(new HasChild(Collections.EMPTY_LIST)),
                "/child/*", Collections.EMPTY_LIST);
    }

    public void testEmptyChildArray() {
        assertXPathPointerIterator(JXPathContext.newContext(new HasChild(new Object[0])),
                "/child/*", list());
    }

    public void testEmptyChildSet() {
        assertXPathPointerIterator(JXPathContext.newContext(new HasChild(Collections.EMPTY_SET)),
                "/child/*", Collections.EMPTY_SET);
    }
}