1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.beanutils.converters;
19  
20  import junit.framework.TestCase;
21  import junit.framework.TestSuite;
22  
23  /***
24   * Tests for the ClassReloader utility class.
25   */
26  
27  public class ClassReloaderTestCase extends TestCase {
28  
29      // ------------------------------------------------------------------------
30  
31      public ClassReloaderTestCase(String name) {
32          super(name);
33      }
34  
35  
36      public static TestSuite suite() {
37          return new TestSuite(ClassReloaderTestCase.class);
38      }
39  
40      // ------------------------------------------------------------------------
41  
42      public static class DummyClass {
43      }
44          
45      /***
46       * Test basic operation of the ClassReloader.
47       */
48      public void testBasicOperation() throws Exception {
49          ClassLoader sharedLoader = this.getClass().getClassLoader();
50          ClassReloader componentLoader = new ClassReloader(sharedLoader);
51  
52          Class sharedClass = DummyClass.class;
53          Class componentClass = componentLoader.reload(sharedClass);
54  
55          // the two Class objects contain the same bytecode, but are not equal
56          assertTrue(sharedClass != componentClass);
57          
58          // the two class objects have different classloaders
59          assertSame(sharedLoader, sharedClass.getClassLoader());
60          assertSame(componentLoader, componentClass.getClassLoader());
61          assertTrue(sharedLoader != componentLoader);
62  
63          // verify that objects of these two types are not assignment-compatible
64          Object obj1 = sharedClass.newInstance();
65          Object obj2 = componentClass.newInstance();
66  
67          assertTrue("Obj1 class incorrect", sharedClass.isInstance(obj1));
68          assertFalse("Obj1 class incorrect", componentClass.isInstance(obj1));
69          assertFalse("Obj2 class incorrect", sharedClass.isInstance(obj2));
70          assertTrue("Obj2 class incorrect", componentClass.isInstance(obj2));
71      }
72  
73  }
74