yarn add --dev @react-native/js-polyfills metro-config @react-native/metro-babel-transformer metro-runtime @react-native/metro-config

Note: We're using yarn to install deps. Feel free to change commands to use npm 3+ and npx if you like

To run the tests in this package, run the following commands from the React Native root folder:

1. yarn to install the dependencies. You just need to run this once
2. yarn jest packages/metro-config.