I think this project github.com/sstephenson/bats can come handy! I have never used it myself though. For me, it was always enough to write tests with mocha & chai (i.e. test that arguments are parsed correctly and your internal logic). What exactly do you want to achieve by testing via CLI?
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re: How would you write tests for a Node CLI? VIEW POST
FULL DISCUSSIONI think this project github.com/sstephenson/bats can come handy! I have never used it myself though. For me, it was always enough to write tests with mocha & chai (i.e. test that arguments are parsed correctly and your internal logic). What exactly do you want to achieve by testing via CLI?