Testing is an integral part of mobile app development to ensure the reliability, functionality, and user experience of your Rocket.Chat mobile app. The Rocket.Chat mobile app uses a comprehensive testing strategy with unit tests and e2e tests.
This guide will walk you through various testing approaches for Rocket.Chat mobile app.
How to inspect the app
Reactotron is used to inspect logs, redux state, redux-sagas, HTTP requests, etc.
Unit tests
Unit tests focus on isolating and testing individual components or functions within your app. They help identify and fix bugs early in the development process and ensure that each part of your app works as intended. For unit tests, we use Jest and Storybook.
Storybook
Storybook is a tool for developing UI components, with plugins that enable Jest to generate snapshots. Navigate to the index.js file in your project's root directory, and keep only the last Storybook import while commenting out the remaining part of the code. Then, refresh your project, and you will observe the generation of tests like this:
Jest
We use Jest for unit tests and to generate Storybook snapshots. There is a pre-commit hook to prevent commits that break any tests. To check for test issues on your code, run this command:
yarn testE2E tests
Detox framework tests our app end-to-end and ensures everything works properly.
To run the test, follow the steps on the e2e GitHub repository.
Code style
ESLint is used to enforce code style and best practices. There is a pre-commit hook enforcing commits to follow our lint rules.
To check for lint issues in your code, run this command:
yarn lintCode formatting
Prettier is used to format the code style in our project. There is a pre-commit hook that enforces the commits to follow our style guides.
To fix your code formatting issues, run this on your terminal:
yarn prettier-lintTo integrate Prettier with your preferred code editor, see the official documentation.