public void testCreateBulkLineWithNullItem() {
        // Test that null item causes exception
        SuggestUtil.createBulkLine("test_index", "_doc", null);
    }

    @Test
    public void testCreateDefaultReadingConverter() {
        // Test creating default reading converter
        ReadingConverter converter = SuggestUtil.createDefaultReadingConverter(client, settings);
        assertNotNull(converter);
    }