1   /*
2    * Copyright 2001-2006 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */ 
16   
17  package org.apache.commons.logging.noop;
18  
19  import java.io.ByteArrayInputStream;
20  import java.io.ByteArrayOutputStream;
21  import java.io.ObjectInputStream;
22  import java.io.ObjectOutputStream;
23  
24  import org.apache.commons.logging.Log;
25  import org.apache.commons.logging.LogFactory;
26  import org.apache.commons.logging.impl.NoOpLog;
27  import org.apache.commons.logging.AbstractLogTest;
28  
29  /***
30   * Tests for NoOpLog logging adapter.
31   * <p>
32   * This simply applies the tests defined in AbstractLogTest to this class.
33   */
34  public class NoOpLogTestCase extends AbstractLogTest
35  {
36      /***
37       * Set up instance variables required by this test case.
38       */
39      public void setUp() throws Exception {
40          LogFactory.releaseAll();
41  
42          System.setProperty(
43                  "org.apache.commons.logging.Log",
44                  "org.apache.commons.logging.impl.NoOpLog");
45      }
46  
47      /***
48       * Tear down instance variables required by this test case.
49       */
50      public void tearDown() {
51          LogFactory.releaseAll();
52      }
53      
54      /***
55  	 * Override the abstract method from the parent class so that the
56       * inherited tests can access the right Log object type. 
57  	 */
58  	public Log getLogObject()
59  	{
60  		return (Log) new NoOpLog(this.getClass().getName());
61  	}
62  
63      // Test Serializability of standard instance
64      public void testSerializable() throws Exception {
65          Log log = LogFactory.getLog(this.getClass().getName());
66          checkLog(log);
67  
68          // Serialize and deserialize the instance
69          ByteArrayOutputStream baos = new ByteArrayOutputStream();
70          ObjectOutputStream oos = new ObjectOutputStream(baos);
71          oos.writeObject(log);
72          oos.close();
73          ByteArrayInputStream bais =
74              new ByteArrayInputStream(baos.toByteArray());
75          ObjectInputStream ois = new ObjectInputStream(bais);
76          log = (Log) ois.readObject();
77          ois.close();
78  
79          checkLog(log);
80      }
81  
82  
83      // -------------------------------------------------------- Support Methods
84  
85      private void checkLog(Log log) {
86  
87          assertNotNull("Log exists", log);
88          assertEquals("Log class",
89                       "org.apache.commons.logging.impl.NoOpLog",
90                       log.getClass().getName());
91  
92          // Can we call level checkers with no exceptions?
93          // Note that *everything* is permanently disabled for NoOpLog
94          assertFalse(log.isTraceEnabled());
95          assertFalse(log.isDebugEnabled());
96          assertFalse(log.isInfoEnabled());
97          assertFalse(log.isWarnEnabled());
98          assertFalse(log.isErrorEnabled());
99          assertFalse(log.isFatalEnabled());
100     }
101 }