new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT);

        SuggestItem[] mergedItems = writer.mergeItems(new SuggestItem[] { item1, item2 });

        assertNotNull(mergedItems);
        assertEquals(1, mergedItems.length);
        assertEquals(3, mergedItems[0].getDocFreq());
    }

    @Test
    public void test_mergeItemsWithDifferentTexts() throws Exception {

        }
        mergedItem.roles = roleList.toArray(new String[roleList.size()]);

        mergedItem.kinds = concatKinds(item1.kinds, item2.kinds);
        mergedItem.timestamp = item2.timestamp;
        mergedItem.queryFreq = item1.queryFreq + item2.queryFreq;
        mergedItem.docFreq = item1.docFreq + item2.docFreq;
        mergedItem.userBoost = item2.userBoost;
        mergedItem.emptySource = item2.emptySource;