package org.codehaus.mojo.javascript.compress;
   
   /*
    * Copyright 2001-2005 The Apache Software Foundation.
    *
    * Licensed 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.
   */
  
  import java.io.File;
  import java.net.URL;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.DefaultArtifact;
  import org.apache.maven.artifact.factory.ArtifactFactory;
  import org.codehaus.plexus.PlexusTestCase;
  
  import junit.framework.TestCase;
  
  /**
   * @author <a href="mailto:nicolas@apache.org">Nicolas De Loof</a>
   */
  public class IsolatedClassLoaderTest
      extends PlexusTestCase
  {
  
      private ArtifactFactory artifactFactory;
  
      protected void setUp()
          throws Exception
      {
          super.setUp();
          artifactFactory = (ArtifactFactory) lookup( ArtifactFactory.class.getName() );
      }
  
      /**
       * Ensure a class can be loaded in isolation based on an artifact
       */
      public void testLoadClassInIsolation()
          throws Exception
      {
          // Create an artifact for junit.jar
          Artifact artifact =
              artifactFactory.createArtifact( "junit", "junit", "3.8.2", DefaultArtifact.SCOPE_TEST,
                  "jar" );
          // locate junit.jar based on current loader class
          URL url = getClass().getClassLoader().getResource( "junit/framework/TestCase.class" );
          String path = url.toString();
          assertTrue( "junit TestCase class is not loaded from a jar", path.startsWith( "jar:" ) );
          int i = path.indexOf( '!' );
          url = new URL( path.substring( 4, i ) );
  
          // setup the isolated classloader
          artifact.setFile( new File( url.getFile() ) );
          ClassLoader cl = new IsolatedClassLoader( artifact, this.getClassLoader() );
  
          Class isolated = cl.loadClass( "junit.framework.TestCase" );
          assertNotNull( "failed to load TestCase class in isolation", isolated );
          assertTrue( "TestCase loaded, but not in isolation", isolated != TestCase.class );
      }
  }