final List<JobExecutor.ShutdownListener> shutdownListeners = new ArrayList<>();

        JobExecutor mockJobExecutor = new JobExecutor() {
            @Override
            public void addShutdownListener(ShutdownListener listener) {
                shutdownListeners.add(listener);
            }

            @Override
            public Object execute(String scriptType, String script) {

    private class MockJobExecutor extends JobExecutor {
        private boolean hasShutdownListener = false;

        @Override
        public void addShutdownListener(ShutdownListener listener) {
            hasShutdownListener = true;
            super.addShutdownListener(listener);
        }

        @Override
        public Object execute(String scriptType, String script) {
            return null;
        }

        }
    }

    private static class TestJobExecutor extends JobExecutor {
        boolean shutdownListenerAdded = false;

        @Override
        public void addShutdownListener(ShutdownListener listener) {
            shutdownListenerAdded = true;
            // Optionally execute the listener to test its behavior
            listener.onShutdown();
        }

        @Override

        }
    }

    private static class TestJobExecutor extends JobExecutor {
        boolean shutdownListenerAdded = false;

        @Override
        public void addShutdownListener(ShutdownListener listener) {
            shutdownListenerAdded = true;
            listener.onShutdown();
        }

        @Override
        public Object execute(String scriptType, String script) {