// Verify only second listener is called
        jobExecutor.shutdown();
        assertEquals(10, callCount.get());
    }

    @Test
    public void test_shutdown() {
        // Test shutdown with listener
        AtomicBoolean shutdownCalled = new AtomicBoolean(false);
        jobExecutor.addShutdownListener(new ShutdownListener() {
            @Override

        Suggester suggester = createSuggester();
        suggester.createIndexIfNothing();

        // Should not throw
        assertNotNull(suggester.refresh());
    }

    @Test
    public void test_shutdown() throws Exception {
        Suggester suggester = createSuggester();

        // Should not throw
        suggester.shutdown();
    }