ResourceSetTest.java

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/*
 * ResourceSetTest.java
 *
 * Copyright (c) 2003 The University of Utah and the Flux Group.
 * All rights reserved.
 *
 * This file is licensed under the terms of the GNU Public License.  
 * See the file "license.terms" for restrictions on redistribution 
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

/**
 * @file ResourceSetTest.java
 *
 * Test for the rk.ResourceSet class.
 */

import rk.ResourceSet;

/**
 * Test for the rk.ResourceSet class.
 */
public class ResourceSetTest
{
    /**
     * Volatile counter variable for an empty 'for' loop, otherwise, it might
     * get optimized away.
     */
    private static volatile int counter;

    /**
     * Verbosity flag, turned on when any arguments are passed to main.
     */
    public static boolean verbose;

    /**
     * Test for the rk.ResourceSet class.
     *
     * @param args The command line arguments.  If any are given, the test will
     * be more verbose about its activity.
     */
    public static void main(String args[])
    {
        long usage, usage2;
        
        if( args.length > 0 )
        {
            verbose = true;
        }
        
        /* Make sure its working in the first place. */
        usage = ResourceSet.getUsage();
        if( verbose )
        {
            System.out.println("usage = " + usage);
        }
        if( usage == 0 )
        {
            System.err.println("Zero usage?");
            System.exit(1);
        }

        /* Chew up some CPU and test again. */
        for( counter = 0; counter < 100000; counter += 1 );
        
        usage2 = ResourceSet.getUsage();
        if( verbose )
        {
            System.out.println("usage2 = " + usage2);
        }
        if( usage2 <= usage )
        {
            System.err.println("Bogus usage: old="
                               + usage
                               + "; new="
                               + usage2);
            System.exit(1);
        }
        
        System.exit(0);
    }
}

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