This template tries to make as many opinionated choices as possible about the dev stack in order to quickly build a product that could sustain a significant amount of traffic/users.

For this template to work all you will need is a Firebase project. I recommend using their free tier to start off.

• create-react-app as the project's starting point, using the cra-template-pwa-typescript template, this includes:
  • React
  • Typescript
  • cra's bundling capabilities
  • Jest for testing
  • PWA pre-configured
• Firebase for Hosting, Database (Firestore) with offline mode enabled, and Authentication
• Github Actions to automate tests and deploys
• material-ui component library
• recoil for state management
• react-hook-form for building forms quickly
• react-testing-library for writing tests

After starting your repo with this template you need to configure your Firebase project:

• Make sure you have enabled all the Firebase services you wish to use in your project
• Copy your firebase config located at Firebase Project > Project Settings > Firebase SDK snippet > Config
• Paste the firebase config to src/db/initFirebase.ts for the respective environment
• Set your Firebase Project as default at .firebaserc

CI tests are configured out of the box, but to enable deploys to Firebase do the following:

• Create a Firebase Auth Token locally: yarn firebase login:ci
• Add the Firebase token to Github as a secret called FIREBASE_TOKEN. You can add secrets at Github Project > Settings > Secrets.
• Open the file .github/workflows/ci.yml and uncomment the lines 25-30

Every time a commit is pushed to github, Github will automatically run the CI tests, build the app and deploy the new version to Firebase. See the ci workflow in .github/workflows/ci.yml for more details.

Run the commands: yarn start. The Firebase server is run as an emulator locally, which means that it won't use any quota of your Firebase project.

The Firestore object has been extended with Typescript to enforce a database schema whenever you use firebase to access your Database, you can define it in src/types/Database.ts. You can then match the names of your Firestore Collections to your schema in src/types/FirestoreCollectionPaths.ts.

I recommend following the react-testing-library advice of writing tests that closely resemble the way your app is used. This means writing more integration tests where you render the whole app and test actual user functionalities.

You can find some functions to help with rendering the app and mocking Firestore collections in the /tests/utils folder. Here is an example of a test:

import renderApp from './utils/renderApp'
import { mockCollection } from './utils/firebaseMocks'

test('display all pets', () => {
  mockCollection('pets', { id: 'test', name: 'Abc' })
  const view = renderApp()
  expect(view.getByText('Abc')).toBeInTheDocument()
})

Make sure to "Allow all actions" in your Github Repo settings.