To set up, first install npm. Then at the top level directory, execute:

$ npm install --save-dev

To run the tests, just do one of:

$ npm test
$ make test

You can also launch the tests in an endless mode which watches for edits and re-runs tests after every change with one of:

$ npm run test -- --no-single-run
$ make testwatch

To run the tests exactly once. Further, to generate a code coverage report you can run one of:

$ npm run test -- --coverage
$ make coverage