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gutenberg @ a4abc8a
jetpack @ 609c992

Mobile Gutenberg

This is the mobile version of Gutenberg, targeting Android and iOS. It's a React Native library bootstrapped by CRNA and now ejected.

Getting Started


For a developer experience closer to the one the project maintainers current have, make sure you have the following tools installed:

  • git
  • nvm
  • Node.js and npm (use nvm to install them)
  • Yarn
  • Android Studio to be able to compile the Android version of the app
  • Xcode to be able to compile the iOS app
  • CocoaPods(sudo gem install cocoapods) needed to fetch React and third-party dependencies.
  • Carthage for appium to be able run iOS UI tests

Depending on your setup, there may be a few configurations needed in Android Studio and Xcode. Please refer to React Native's documentation for the latest requirements for each development environment.

Note that the OS platform used by the maintainers is macOS but the tools and setup should be usable in other platforms too.

Clone the project

  • Clone the project and submodules:
git clone --recurse-submodules
  • Or if you already have the project cloned, initialize and update the submodules:
git submodule init
git submodule update

Set up

Before running the demo app, you need to download and install the project dependencies. This is done via the following command:

cd gutenberg
nvm install --latest-npm
cd ..
npm install


npm run start:reset

Runs the packager (Metro) in development mode. The packager stays running to serve the app bundle to the clients that request it.

With the packager running, open another terminal window and use the following command to compile and run the Android app:

npm run core android

The app should now open in a connected device or a running emulator and fetch the JavaScript code from the running packager.

To compile and run the iOS variant of the app using the default simulator device, use:

npm run core ios

which will attempt to open your app in the iOS Simulator if you're on a Mac and have it installed.

Running on Other iOS Device Simulators

To compile and run the app using a different device simulator, use:

npm run core ios --simulator="DEVICE_NAME"

For example, if you'd like to run in an iPhone Xs Max, try:

npm run core ios --simulator="iPhone Xs Max"

To see a list of all of your available iOS devices, use xcrun simctl list devices.


If the Android emulator doesn't start correctly, or compiling fails with Could not initialize class org.codehaus.groovy.runtime.InvokerHelper or similar, it may help to double check the set up of your development environment against the latest requirements in React Native's documentation. With Android Studio, for example, you will need to configure the ANDROID_HOME environment variable and ensure that your version of JDK matches the latest requirements.

Some times, and especially when tweaking anything in the package.json, Babel configuration (.babelrc) or the Jest configuration (jest.config.js), your changes might seem to not take effect as expected. On those times, you might need to clean various caches before starting the packager. To do that, run the script: npm run start:reset. Other times, you might want to reinstall the NPM packages from scratch and the npm run clean:install script can be handy.

Developing with Visual Studio Code

Although you're not required to use Visual Studio Code for developing gutenberg-mobile, it is the recommended IDE and we have some configuration for it.

When you first open the project in Visual Studio, you will be prompted to install some recommended extensions. This will help with some things like type checking and debugging.

Prompt to install recommended extensions

One of the extensions we are using is the React Native Tools. This allows you to run the packager from VSCode or launch the application on iOS or Android. It also adds some debug configurations so you can set breakpoints and debug the application directly from VSCode. Take a look at the extension documentation for more details.

Unit Tests

Use the following command to run the test suite:

npm run test

It will run the jest test runner on your tests. The tests are running on the desktop against Node.js.

To run the tests with debugger support, start it with the following CLI command:

npm run test:debug

Then, open chrome://inspect in Chrome to attach the debugger (look into the "Remote Target" section). While testing/developing, feel free to sprinkle debugger statements anywhere in the code that you'd like the debugger to break.

Writing and Running Unit Tests

This project is set up to use jest for tests. You can configure whatever testing strategy you like, but jest works out of the box. Create test files in directories called __tests__ or with the .test.js extension to have the files loaded by jest. See an example test here. The jest documentation is also a wonderful resource, as is the React Native testing tutorial.

UI Tests

This repository uses Appium to run UI tests. The tests live in __device-tests__ and are written using Appium to run tests against simulators and real devices. To run these you'll need to check off a few things:

  • When running the tests, you'll need to ensure the Metro bundler (npm run start) is not running.
  • Appium CLI installed and available globally. We also recommend using appium-doctor to ensure all of Appium's dependencies are good to go. You don't have to worry about starting the server yourself, the tests handle starting the server on port 4723, just be sure that the port is free or feel free to change the port number in the test file.
  • For iOS a simulator should automatically launch but for Android you'll need to have an emulator with at least platform version 8.0 fired up and running.

Then, to run the UI tests on iOS:

npm run test:e2e:ios:local

and for Android:

npm run test:e2e:android:local

To run a single test instead of the entire suite, use npm run device-tests:local. Here's an example that runs only gutenberg-editor-paragraph.test:

TEST_RN_PLATFORM=ios npm run device-tests:local gutenberg-editor-paragraph.test

Note: You might experience problems that seem to be related to the tests starting the Appium server, e.g. errors that say Connection Refused, Connection Reset or The requested environment is not available. For now, you can manually start the Appium server via appium desktop or the CLI, then change the port number in the tests while (optionally) commenting out related code in the beforeAll and afterAll block.

For a more detailed outline of the UI tests and how to get started writing one, please visit the UI Test documentation and our contributing guide.

Static analysis and code style

The project includes a linter (eslint) to perform codestyle and static analysis of the code. The configuration used is the same as the one in the Gutenberg project. To perform the check, run:

npm run lint

To have the linter also fix the violations run: npm run lint:fix.

You might want to use Visual Studio Code as an editor. The project includes the configuration needed to use the above codestyle and linting tools automatically.


Gutenberg Mobile is an Open Source project covered by the GNU General Public License version 2.