unit: query result array add coverage (#2390)
unit: query result array add coverage (#2390)

* add coverage for query result array
couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios