Last modified on Fri 29 Jan 2021

Testing React Native is similar to default React testing, so for a quick intro in React testing - you can check my video tutorial https://www.youtube.com/watch?v=AhH5xFPwNHg.


By default - RN ships with Jest testing library that doesn’t require additional setup and works out of the box. To run tests - use:

npm run test

But default test which can be found in tests/ folder is too simple and for more complicated and useful tests we will require another library - https://github.com/callstack/react-native-testing-library (which replaces Enzyme if you’re familiar with that)

npm install --save-dev @testing-library/react-native

To have more matchers we can also install https://github.com/testing-library/jest-native

npm install --save-dev @testing-library/jest-native

Testing Styled components

!! NOT WORKING in ("jest-styled-components": "7.0.3") !! https://github.com/styled-components/jest-styled-components/issues/294

As styled-components is our RN way of styling - we need to know how to test it. But not now :\

Mocking native modules

Native Modules requires a running React Native application to work properly. In order to use it in tests, you have to provide its separate implementation.

  1. Async storage - https://react-native-community.github.io/async-storage/docs/advanced/jest/#with-jest-setup-file

  2. React Native Gesture Handler - https://docs.swmansion.com/react-native-gesture-handler/docs/#testing

General recommendations about testing

  1. Test actual result, not state(for example in case of opening/closing modal instead of checking modal state you should check if modal component appeared on the page.)
  2. In case of testing API request you need to mock the result of the request(you can just copy response from a real request and store it as an object.) and pass it to the component you're testing as a prop.
  3. For searching elements use testID prop on RN component. This is 100% way of finding correct element for your test.


Test project with examples could be found here https://github.com/Hardronox/RN-testing-examples


  1. https://jestjs.io/docs/en/tutorial-react-native
  2. https://reactnative.dev/docs/testing-overview
  3. https://github.com/styled-components/jest-styled-components