jdk/test/java/lang/management/RuntimeMXBean/PropertiesTest.java

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug     6260131
 * @summary Test for RuntimeMXBean.getSystemProperties() if the system
 *          properties contain another list of properties as the defaults.
 * @author  Mandy Chung
 *
 * @run build PropertiesTest
 * @run main  PropertiesTest
 */

import java.util.*;
import java.io.*;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;

public class PropertiesTest {
    private static int NUM_MYPROPS = 3;
    public static void main(String[] argv) throws Exception {
        // Save a copy of the original system properties
        Properties props = System.getProperties();

        try {
            // replace the system Properties object for any modification
            // in case jtreg caches a copy
            System.setProperties(new Properties(props));
            runTest(props.size());
        } finally {
            // restore original system properties
            System.setProperties(props);
        }
    }

    private static void runTest(int sysPropsCount) throws Exception {
        // Create a new system properties using the old one
        // as the defaults
        Properties myProps = new Properties( System.getProperties() );

        // add several new properties
        myProps.put("good.property.1", "good.value.1");
        myProps.put("good.property.2", "good.value.2");
        myProps.put("good.property.3", "good.value.3");
        myProps.put("good.property.4", new Integer(4));
        myProps.put(new Integer(5), "good.value.5");
        myProps.put(new Object(), new Object());

        System.setProperties(myProps);

        Map<String,String> props =
            ManagementFactory.getRuntimeMXBean().getSystemProperties();
        int i=0;
        for (Map.Entry<String,String> e : props.entrySet()) {
            String key = e.getKey();
            String value = e.getValue();
            System.out.println(i++ + ": " + key + " : " + value);
        }

        if (props.size() != NUM_MYPROPS + sysPropsCount) {
            throw new RuntimeException("Test Failed: " +
                "Expected number of properties = " +
                NUM_MYPROPS + sysPropsCount +
                " but found = " + props.size());
        }
    }
}