Problem with jest when testing GestureHandler

#1

I’m trying to test a component that contains a Swipeable from react-native-gesture-handler, but I’m getting this error Cannot read property 'State' of undefined.

It’s a bug in node_modules/react-native-gesture-handler/GestureHandler.js:39:33 in the line:
const State = RNGestureHandlerModule.State;

I’m wondering if GestureHandler isn’t being mocked by jest-expo.

This is my package.json

{
  "scripts": {
    "test": "node node_modules/jest/bin/jest.js --watch"
  },
  "jest": {
    "preset": "jest-expo",
    "testMatch": ["**/Tests/**/*.js"],
    "transformIgnorePatterns": [
      "node_modules/(?!react-native|native-base|react-navigation)/"
    ],
    "globals": { "__DEV__": true }
  },
  "dependencies": {
    "expo": "^22.0.0",
    "react": "16.0.0-beta.5",
    "react-native": "https://github.com/expo/react-native/archive/sdk-22.0.1.tar.gz"
  },
  "devDependencies": {
    "jest-expo": "^22.0.0",
    "react-test-renderer": "16.0.0-beta.5"
  }
}

1 Like
#2

Having same trouble!