gpio-mock-test-nodejs/README.md

# GPIO-mock test nodejs

test gpio in a container (without them being physically available)

idea/initial mock forked from: https://github.com/sitepoint-editors/TddWithGpio

Article: https://www.sitepoint.com/getting-started-with-the-raspberry-pi-gpio-pins-in-node-js/

## run dev

~~~shell
docker run -it --rm -v $(pwd):/app -w /app node:lts bash
~~~

followed by

~~~shell
npm install
npm run test
~~~

## Jest

- https://jestjs.io/docs/using-matchers
- https://dev.to/zaklaughton/the-only-3-steps-you-need-to-mock-an-api-call-in-jest-39mb
- https://jestjs.io/docs/mock-functions#mocking-modules

## TODO

idea: mock functions of `onoff` to test behaviour of functions which rely on GPIO being low/high

check this out: https://stackoverflow.com/questions/50066138/mock-fs-function-with-jest

is this going to be a problem? https://stackoverflow.com/questions/62568294/nodejs-fs-watch-inside-docker-container-detects-changes-twice