CompositeClassLoader is inappropriately using reflection for methods …

…it has access to #214

#214
Added a test case for CompositeClassLoader
Signed-off-by: Steve Davidson <steve@j2eeguys.com>

xstream/src/test/com/thoughtworks/xstream/core/util/CompositeClassLoaderTest.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2020 Steve Davidson
+ * Copyright (C) 2020 XStream Committers.
+ * All rights reserved.
+ *
+ * The software in this package is published under the terms of the BSD
+ * style license a copy of which has been included with this distribution in
+ * the LICENSE.txt file.
+ * 
+ * Created on 30. July 2020 by Steve Davidson
+ */
+
+package com.thoughtworks.xstream.core.util;
+
+import junit.framework.TestCase;
+
+public class CompositeClassLoaderTest extends TestCase {
+
+    class DummyClassLoader extends ClassLoader {
+        public DummyClassLoader(){
+            //end init
+        }
+    }
+
+    public void testAdd(){
+        //Just check that Exceptions don't get thrown
+        final CompositeClassLoader cl = new CompositeClassLoader();
+        ClassLoader testCl = new DummyClassLoader();
+        cl.add(testCl);
+        cl.add(testCl);
+        testCl = null;
+        cl.add(testCl);
+    }
+}
+