--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/instrument/appendToClassLoaderSearch/CircularityErrorTest.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ *
+ *
+ * Unit test for Instrumentation appendToBootstrapClassLoaderSearch:
+ *
+ * 1. Reference class A. Resolving this class should fail with
+ *    ClassCircularityError.
+ *
+ * 2. Add JAR file to boot class path which contains a "good"
+ *    version of A.
+ *
+ * 3. Re-run the code for 1 again - it should fail with
+ *    ClassCircularityError again.
+ */
+import java.lang.instrument.Instrumentation;
+import java.util.jar.JarFile;
+
+public class CircularityErrorTest {
+
+    static Instrumentation ins;
+
+    static void resolve() {
+        try {
+            Class c = A.class;
+            throw new RuntimeException("Test failed - class A loaded by: " +
+                c.getClassLoader());
+        } catch (ClassCircularityError e) {
+            System.err.println(e);
+        }
+    }
+
+    public static void main(String args[]) throws Exception {
+        resolve();
+        ins.appendToBootstrapClassLoaderSearch(new JarFile("A.jar"));
+        resolve();
+    }
+
+    public static void premain(String args, Instrumentation i) {
+        ins = i;
+    }
+}