tests: don't split an empty string
tests: don't split an empty string

(cherry picked from commit a94496fbb672fce43b66f56ed0bbd69a560d5654)

reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin