First, install Node.js, if you don’t have it.

Then, run

$ npm install

in the repository directory.

You can confirm it’s working by running:

$ npm test

This primer uses Mocha. The project website has good and consice documentation about how it works.

Asserts are done via the better-assert library, which is very straight-forward, just pass a boolean value.

The game of life code is short enough so that it’s fine if we write both the code and the tests in the same file.

$ npm test

Deleting code is hard on the mind, but not hard on the console. Just run:

$ npm run-script reset

WARNING: This will permanently delete all modifications after the previous commit.