/*
 *  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.tools.ant.util;

import java.io.IOException;
import java.util.Enumeration;

import junit.framework.TestCase;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Path;


/**
 * Test case for ClasspathUtils
 *
 */
public class ClasspathUtilsTest extends TestCase {

    private Project p;

    public ClasspathUtilsTest(String name) {
        super(name);
    }

    public void setUp() {
        p = new Project();
        p.init();
    }


    public void testOnlyOneInstance() {
        Enumeration enumeration;
        String list = "";
        ClassLoader c = ClasspathUtils.getUniqueClassLoaderForPath(p, (Path) null, false);
        try {
            enumeration = c.getResources(
                "org/apache/tools/ant/taskdefs/defaults.properties");
        } catch (IOException e) {
            throw new BuildException(
                "Could not get the defaults.properties resource");
        }
        int count = 0;
        while (enumeration.hasMoreElements()) {
            list = list + " " + enumeration.nextElement();
            count++;
        }
        assertTrue("Should be only one and not " + count + " " + list, count == 1);
    }
}