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Java > Open Source Codes > org > apache > commons > logging > config > FirstPriorityConfigTestCase


1 /*
2  * Copyright 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.config;
18
19
20 import java.net.URL JavaDoc;
21
22 import junit.framework.Test;
23 import junit.framework.TestCase;
24
25 import org.apache.commons.logging.LogFactory;
26 import org.apache.commons.logging.PathableClassLoader;
27 import org.apache.commons.logging.PathableTestSuite;
28
29
30 /**
31  * Tests that verify that the process of configuring logging on startup
32  * works correctly by selecting the file with the highest priority.
33  * <p>
34  * This test sets up a classpath where:
35  * <ul>
36  * <li> first file found has priority=20
37  * <li> second file found has priority=10
38  * </ul>
39  * The result should be that the first file is used.
40  */
41 public class FirstPriorityConfigTestCase extends TestCase {
42
43     // ------------------------------------------- JUnit Infrastructure Methods
44
45
46     /**
47      * Return the tests included in this test suite.
48      */
49     public static Test suite() throws Exception JavaDoc {
50         Class JavaDoc thisClass = FirstPriorityConfigTestCase.class;
51
52         // Determine the URL to this .class file, so that we can then
53 // append the priority dirs to it. For tidiness, load this
54 // class through a dummy loader though this is not absolutely
55 // necessary...
56 PathableClassLoader dummy = new PathableClassLoader(null);
57         dummy.useSystemLoader("junit.");
58         dummy.addLogicalLib("testclasses");
59         dummy.addLogicalLib("commons-logging");
60         
61         String JavaDoc thisClassPath = thisClass.getName().replace('.', '/') + ".class";
62         URL JavaDoc baseUrl = dummy.findResource(thisClassPath);
63
64         // Now set up the desired classloader hierarchy. We'll put a config
65 // file of priority=10 in the container path, and ones of both
66 // "no priority" and priority=20 in the webapp path.
67 //
68 // A second properties file with priority=20 is also added,
69 // so we can check that the first one in the classpath is
70 // used.
71 PathableClassLoader containerLoader = new PathableClassLoader(null);
72         containerLoader.useSystemLoader("junit.");
73         containerLoader.addLogicalLib("commons-logging");
74         
75         PathableClassLoader webappLoader = new PathableClassLoader(containerLoader);
76         webappLoader.addLogicalLib("testclasses");
77
78         URL JavaDoc pri20URL = new URL JavaDoc(baseUrl, "priority20/");
79         webappLoader.addURL(pri20URL);
80
81         URL JavaDoc pri10URL = new URL JavaDoc(baseUrl, "priority10/");
82         webappLoader.addURL(pri10URL);
83         
84         // load the test class via webapp loader, and use the webapp loader
85 // as the tccl loader too.
86 Class JavaDoc testClass = webappLoader.loadClass(thisClass.getName());
87         return new PathableTestSuite(testClass, webappLoader);
88     }
89
90     /**
91      * Set up instance variables required by this test case.
92      */
93     public void setUp() throws Exception JavaDoc {
94         LogFactory.releaseAll();
95     }
96
97     /**
98      * Tear down instance variables required by this test case.
99      */
100     public void tearDown() {
101         LogFactory.releaseAll();
102     }
103
104     // ----------------------------------------------------------- Test Methods
105
106     /**
107      * Verify that the config file being used is the one containing
108      * the desired configId value.
109      */
110     public void testPriority() throws Exception JavaDoc {
111         LogFactory instance = LogFactory.getFactory();
112         String JavaDoc id = (String JavaDoc) instance.getAttribute("configId");
113         assertEquals("Correct config file loaded", "priority20", id );
114     }
115 }
116
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