lucene/core/src/test/org/apache/lucene/util/TestSPIClassIterator.java

/*
 * 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.lucene.util;


import java.net.URL;
import java.net.URLClassLoader;

public class TestSPIClassIterator extends LuceneTestCase {

  public void testParentChild() throws Exception {
    final ClassLoader parent = getClass().getClassLoader();
    final ClassLoader child = URLClassLoader.newInstance(new URL[0], parent);
    assertTrue(checkNoPerms(parent, parent));
    assertTrue(checkNoPerms(child, child));
    assertTrue(checkNoPerms(parent, child));
    assertFalse(checkNoPerms(child, parent));
  }
  
  private boolean checkNoPerms(ClassLoader parent, ClassLoader child) throws Exception {
    return runWithRestrictedPermissions(() -> SPIClassIterator.isParentClassLoader(parent, child));
  }
  
}