/*

 * 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.

 *

 */

/*

 *

 *

 * Basic unit test for Instrumentation appendToBootstrapClassLoaderSearch and

 * appendToSystemClassLoaderSearch methods:

 *

 * 1. Adds a jar file to the bootstrap class loader search; Loads a class known

 *    to be in the jar file and checks that it was loaded by the bootstrap class

 *    loader.

 *

 * 2. Adds a jar file to the system class loader search; Loads a class known

 *    to be in the jar file and checks that it was indeed loaded by the system

 *    class loader.

 */

import java.lang.instrument.Instrumentation;

import java.util.jar.JarFile;

import java.io.IOException;

public class BasicTest {

    // count of failures

    static int failures = 0;

    // check that the given class is loaded by the given loader

    static void checkLoadedByLoader(String name, ClassLoader loader) {

        try {

            Class cl = Class.forName(name);

            ClassLoader actual = cl.getClassLoader();

            String loaderName = (actual == null) ? "boot class loader" : actual.toString();

            if (actual != loader) {

                System.out.println("FAIL: " + name + " incorrectly loaded by: " + loaderName);

                failures++;

            } else {

                System.out.println("PASS: " + name + " loaded by: " + loaderName);

            }

        } catch (Exception x) {

            System.out.println("FAIL: Unable to load " + name + ":" + x);

            failures++;

        }

    }

    public static void main(String args[]) throws IOException {

        JarFile bootclasses = new JarFile("BootSupport.jar");

        JarFile agentclasses = new JarFile("AgentSupport.jar");

        Instrumentation ins = Agent.getInstrumentation();

        // Test 1: Add BootSupport.jar to boot class path and check that

        // BootSupport is loaded by the bootstrap class loader

        ins.appendToBootstrapClassLoaderSearch(bootclasses);

        checkLoadedByLoader("BootSupport", null);

        // Test 2: Add AgentSupport.jar to the system class path and check that

        // AgentSupport is loaded by the system class loader.

        try {

            ins.appendToSystemClassLoaderSearch(agentclasses);

            checkLoadedByLoader("AgentSupport", ClassLoader.getSystemClassLoader());

        } catch (UnsupportedOperationException x) {

            System.out.println("System class loader does not support adding to class path");

        }

        // throw exception if a test failed

        if (failures > 0) {

            throw new RuntimeException(failures + " test(s) failed.");

        }

    }

}