New test case for additional PathableTestSuite functionality.

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/logging/trunk@209413 13f79535-47bb-0310-9956-ffa450edef68

src/test/org/apache/commons/logging/pathable/GeneralTestCase.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2005 The Apache Software Foundation.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */ 
+package org.apache.commons.logging.pathable;
+
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.ArrayList;
+import java.net.URLClassLoader;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+import org.apache.commons.logging.PathableTestSuite;
+import org.apache.commons.logging.PathableClassLoader;
+
+/**
+ * Tests for the PathableTestSuite class.
+ */
+
+public class GeneralTestCase extends TestCase {
+    
+    /**
+     * Set up a custom classloader hierarchy for this test case.
+     */
+    public static Test suite() throws Exception {
+        Class thisClass = GeneralTestCase.class;
+        ClassLoader thisClassLoader = thisClass.getClassLoader();
+        
+        PathableClassLoader loader = new PathableClassLoader(null);
+        loader.useExplicitLoader("junit.", thisClassLoader);
+        loader.addLogicalLib("testclasses");
+
+        // reload this class via the child classloader
+        Class testClass = loader.loadClass(thisClass.getName());
+        
+        // and return our custom TestSuite class
+        return new PathableTestSuite(testClass, loader);
+    }
+    
+    /**
+     * Verify that a certain system property is not set, then set it.
+     */
+    private static void checkAndSetProperties() {
+        String prop = System.getProperty("no.such.property");
+        assertNull("no.such.property is unexpectedly defined", prop);
+        System.setProperty("no.such.property", "dummy value");
+        prop = System.getProperty("no.such.property");
+        assertNotNull("no.such.property is unexpectedly undefined", prop);
+    }
+    
+    /**
+     * Verify that when a test method modifies the system properties they are
+     * reset before the next test is run.
+     * <p>
+     * This method works in conjunction with testResetProps2. There is no
+     * way of knowing which test method junit will run first, but it doesn't
+     * matter; whichever one of them runs first will modify the system properties.
+     * If the PathableTestSuite isn't resetting the system properties then whichever
+     * of them runs second will fail. Of course if other methods are run in-between
+     * then those methods might also fail...
+     */
+    public void testResetProps1() {
+        checkAndSetProperties();
+    }
+
+    /**
+     * See testResetProps1.
+     */
+    public void testResetProps2() {
+        checkAndSetProperties();
+    }
+}