Please add test cases to the test/compare/input.js and
test/compore/output.js. That will reduce the chance of introducing regressions
and make it clear what is the expected behavior.
Install the npm dependencies:
$ cd esformatter-semicolon-first
$ npm install
And to run it you just need to do:
$ npm test
It will compare the input.js with the output.js.
Thanks!