CommentService - recommend comment test ok
CommentService - opposite comment test ok
create table for store recommended comment by specific user

recommendComment will check is it recommended by same user before
CommentService - inc recommend comment only one time test ok
CommentService - opposite commenttwice test ok

create table OPPOSITED_COMMENT to check is opposited comment by specific
user
refactoring - CommentServiceTest
change some names
RecommendCommentController - recommend comment work with web page

if not logon and push recommend button, login popup will show.
if logon and push recommend button recommend count will increase.
Recommend count change when click.

send ajax request and receive success -> ++
else do nothing

create RuntimeException to check duplicated recommend of comment
It need to be specific Exception
Opposite comment ok

works like recommend button.