001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.commons.beanutils.converters;
019    
020    import junit.framework.TestCase;
021    import junit.framework.TestSuite;
022    
023    /**
024     * Tests for the ClassReloader utility class.
025     */
026    
027    public class ClassReloaderTestCase extends TestCase {
028    
029        // ------------------------------------------------------------------------
030    
031        public ClassReloaderTestCase(String name) {
032            super(name);
033        }
034    
035    
036        public static TestSuite suite() {
037            return new TestSuite(ClassReloaderTestCase.class);
038        }
039    
040        // ------------------------------------------------------------------------
041    
042        public static class DummyClass {
043        }
044            
045        /**
046         * Test basic operation of the ClassReloader.
047         */
048        public void testBasicOperation() throws Exception {
049            ClassLoader sharedLoader = this.getClass().getClassLoader();
050            ClassReloader componentLoader = new ClassReloader(sharedLoader);
051    
052            Class sharedClass = DummyClass.class;
053            Class componentClass = componentLoader.reload(sharedClass);
054    
055            // the two Class objects contain the same bytecode, but are not equal
056            assertTrue(sharedClass != componentClass);
057            
058            // the two class objects have different classloaders
059            assertSame(sharedLoader, sharedClass.getClassLoader());
060            assertSame(componentLoader, componentClass.getClassLoader());
061            assertTrue(sharedLoader != componentLoader);
062    
063            // verify that objects of these two types are not assignment-compatible
064            Object obj1 = sharedClass.newInstance();
065            Object obj2 = componentClass.newInstance();
066    
067            assertTrue("Obj1 class incorrect", sharedClass.isInstance(obj1));
068            assertFalse("Obj1 class incorrect", componentClass.isInstance(obj1));
069            assertFalse("Obj2 class incorrect", sharedClass.isInstance(obj2));
070            assertTrue("Obj2 class incorrect", componentClass.isInstance(obj2));
071        }
072    
073    }
074