firebase-jest-testing

**Link to project (GitHub)**: http://github.com/akauppi/firebase-jest-testing

**Describe the project in 2-3 sentences**:

Tools for testing Firebase back-end features, using Jest 27.

This repo provides a "one stop", opinionated, end-to-end approach to testing Firebase projects. Using it may save you from reading countless pages of documentation and evaluating different testing strategies and libraries.

**Why would Firebase developers be interested in this project?**:

If you test Firestore Security Rules, the repo provides an immutable abstraction over your test data. An approved write or delete does *not* change the underlying data - just tells that the operation would succeed. This helps make tests easier, since they never mess with each other.

For testing the effects of Cloud Functions, the repo provides you means to wait for changes to happen in Firestore data.

The intention is to cover *all* Firebase back-end test use cases. If yours is lacking, let's code it in!

**Have you added a `.opensource/project.json` file to your site**: No

What is it??? Why would I want to add such? The project is MIT licensed.

Examples:
- https://github.com/invertase/react-native-firebase/blob/master/.opensource/project.json
- https://github.com/sgarciac/fuego/blob/master/.opensource/project.json
- https://github.com/firebase/emberfire/blob/master/.opensource/project.json