assertTrue(tagSet.contains("tag2"));
        assertTrue(tagSet.contains("tag3"));
    }

    @Test
    public void testMerge_roles() {
        SuggestItem item1 = createItemWithRoles("text", "role1", "role2");
        SuggestItem item2 = createItemWithRoles("text", "role2", "role3");

        SuggestItem merged = SuggestItemMerger.merge(item1, item2);

        String[] roles = merged.getRoles();