This project has automated tests which can be run with npm test. This will be
run in Travis CI when you make a Pull Request so please try to ensure that they
are passing when submitting one. If your PR adds new features please also add
tests. If your PR fixes a bug, it might be helpful to add a test which would fail
if the bug was re-introduced.
The source code of this project is also checked for coding errors and code style
consistency using ESLint. You can run it with npm run lint to see any errors,
and you can automatically fix some coding style errors using npm run lint-fix.