Suggester suggester = createSuggester();

        assertNotNull("Indexer should not be null", suggester.indexer());
    }

    @Test
    public void test_refresh_onEmptyIndex() throws Exception {
        Suggester suggester = createSuggester();
        suggester.createIndexIfNothing();

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