    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