FirstPriorityConfigTestCase xref

    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.logging.config;
    19
    20
    21  import java.net.URL;
    22
    23  import junit.framework.Test;
    24  import junit.framework.TestCase;
    25
    26  import org.apache.commons.logging.LogFactory;
    27  import org.apache.commons.logging.PathableClassLoader;
    28  import org.apache.commons.logging.PathableTestSuite;
    29
    30
    31  /**
    32   * Tests that verify that the process of configuring logging on startup
    33   * works correctly by selecting the file with the highest priority.
    34   * <p>
    35   * This test sets up a classpath where:
    36   * <ul>
    37   * <li> first file found has priority=20
    38   * <li> second file found has priority=10
    39   * </ul>
    40   * The result should be that the first file is used.
    41   */
    42  public class FirstPriorityConfigTestCase extends TestCase {
    43
    44      // ------------------------------------------- JUnit Infrastructure Methods
    45
    46
    47      /**
    48       * Return the tests included in this test suite.
    49       */
    50      public static Test suite() throws Exception {
    51          Class thisClass = FirstPriorityConfigTestCase.class;
    52
    53          // Determine the URL to this .class file, so that we can then
    54          // append the priority dirs to it. For tidiness, load this
    55          // class through a dummy loader though this is not absolutely
    56          // necessary...
    57          PathableClassLoader dummy = new PathableClassLoader(null);
    58          dummy.useExplicitLoader("junit.", Test.class.getClassLoader());
    59          dummy.addLogicalLib("testclasses");
    60          dummy.addLogicalLib("commons-logging");
    61
    62          String thisClassPath = thisClass.getName().replace('.', '/') + ".class";
    63          URL baseUrl = dummy.findResource(thisClassPath);
    64
    65          // Now set up the desired classloader hierarchy. We'll put JCL
    66          // in the container path, the testcase in a webapp path, and
    67          // both config files into the webapp path too.
    68          PathableClassLoader containerLoader = new PathableClassLoader(null);
    69          containerLoader.useExplicitLoader("junit.", Test.class.getClassLoader());
    70          containerLoader.addLogicalLib("commons-logging");
    71
    72          PathableClassLoader webappLoader = new PathableClassLoader(containerLoader);
    73          webappLoader.addLogicalLib("testclasses");
    74
    75          URL pri20URL = new URL(baseUrl, "priority20/");
    76          webappLoader.addURL(pri20URL);
    77
    78          URL pri10URL = new URL(baseUrl, "priority10/");
    79          webappLoader.addURL(pri10URL);
    80
    81          // load the test class via webapp loader, and use the webapp loader
    82          // as the tccl loader too.
    83          Class testClass = webappLoader.loadClass(thisClass.getName());
    84          return new PathableTestSuite(testClass, webappLoader);
    85      }
    86
    87      /**
    88       * Set up instance variables required by this test case.
    89       */
    90      public void setUp() throws Exception {
    91          LogFactory.releaseAll();
    92      }
    93
    94      /**
    95       * Tear down instance variables required by this test case.
    96       */
    97      public void tearDown() {
    98          LogFactory.releaseAll();
    99      }
    100
    101     // ----------------------------------------------------------- Test Methods
    102
    103     /**
    104      * Verify that the config file being used is the one containing
    105      * the desired configId value.
    106      */
    107     public void testPriority() throws Exception {
    108         LogFactory instance = LogFactory.getFactory();
    109
    110         ClassLoader thisClassLoader = this.getClass().getClassLoader();
    111         ClassLoader lfClassLoader = instance.getClass().getClassLoader();
    112         ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
    113
    114         // context classloader should be thisClassLoader
    115         assertEquals(thisClassLoader, contextClassLoader);
    116
    117         // lfClassLoader should be parent of this classloader
    118         assertEquals(lfClassLoader, thisClassLoader.getParent());
    119         assertEquals(PathableClassLoader.class.getName(),
    120                 lfClassLoader.getClass().getName());
    121
    122         String id = (String) instance.getAttribute("configId");
    123         assertEquals("Correct config file loaded", "priority20", id );
    124     }
    125 }