import jdk.nashorn.api.scripting.NashornScriptEngineFactory;

import javax.script.ScriptEngine;
import javax.script.ScriptException;
import java.lang.management.ClassLoadingMXBean;
import java.lang.management.ManagementFactory;
import java.util.Random;

public class MemoryLeakTest {

    public static void main(String[] args) throws ScriptException {
        ClassLoadingMXBean classLoadingMXBean = ManagementFactory.getClassLoadingMXBean();
        ScriptEngine engine = new NashornScriptEngineFactory().getScriptEngine();
        for (int x=0; x<1000000;x ++){
            //function has to be evald in a different call than actually executing the function, otherwise problem doesn't occur
            engine.eval("Wrapper = { smth: function() { return arguments.length } }");
            //eval script with a random number to avoid hitting the compilation cache
            engine.eval("var blah = " + new Random().nextInt(100000) + " ; Wrapper.smth('/test', function() {})");

            if(x % 1000 == 0){
                System.out.println("Number of classes loaded: " + classLoadingMXBean.getLoadedClassCount());
            }

        }
    }
}