code: @Test public void testMultipleConditionsInExpression() throws NullPointerException, EvaluationException {
    LoggerContext loggerContext=new LoggerContext();
    Logger logger=loggerContext.getLogger("xx");
    JaninoEventEvaluator ee=new JaninoEventEvaluator();
    ee.setName("testEval");
    ee.setContext(loggerContext);
    ee.setExpression("message.contains(\"stacktrace\") && message.contains(\"logging\")");
    ee.start();
    String message="stacktrace bla bla logging";
    ILoggingEvent event=new LoggingEvent(this.getClass().getName(),logger,Level.DEBUG,message,null,null);
    assertTrue(ee.evaluate(event));
  }
  