How to use Jest with React Native

Question

The testing section of the docs for React Native suggest that Jest is the official way to do unit tests. However, they don\'t explain how to get it setup. Running Jest witho

Answer 1

For newer versions of jest, setting it up for react-native is very easy.

Install jest using

npm install --save-dev jest-cli babel-jest

In package.json, add this

"scripts": {
  "start": "babel-node ./server/server.js",
  "import-data": "babel-node ./scripts/import-data-from-parse.js",
  "update-schema": "babel-node ./server/schema/updateSchema.js",
  "test": "jest",
  "lint": "eslint ."
},
"jest": {
  "haste": {
    "defaultPlatform": "ios",
    "platforms": [
      "ios",
      "android"
    ],
    "providesModuleNodeModules": [
      "react-native"
    ]
  }
},

You might only need to add lines related to jest

Now you can use

npm test

to run jest.

Refer to f8app's github repo to find more about this.