// Call shutdown
        scriptExecutor.shutdown();

        // Verify listener was called
        assertTrue(listener.wasShutdownCalled());
    }

    @Test
    public void test_shutdown_withoutListener() {
        // Call shutdown without setting listener
        try {
            scriptExecutor.shutdown();
            fail("Expected NullPointerException");
        } catch (NullPointerException e) {

            }
        });

        assertFalse(shutdownCalled.get());
        jobExecutor.shutdown();
        assertTrue(shutdownCalled.get());
    }

    @Test
    public void test_shutdown_withoutListener() {
        // Test shutdown without listener should throw NullPointerException
        try {
            jobExecutor.shutdown();
            fail("Expected NullPointerException");