Jest setup

[Alaa-Ben]

Hi ! Are there any guides about how to setup this with jest ? A simple example with Picker causes the following error:

    Warning: Function components cannot be given refs. Attempts to access this ref will fail. Did you mean to use React.forwardRef()?

    Check the render method of `Picker`.

I figured this happens because in my setup file, I mock the platform (for other tests purposes):

jest.mock('react-native/Libraries/Utilities/Platform', () => {
  const platform = jest.requireActual('react-native/Libraries/Utilities/Platform')
  return {
    ...platform,
    OS: 'android',
    constants: {
      ...platform.constants,
      reactNativeVersion: {
        major: 0,
        minor: 70,
        patch: 6
      }
    }
  }
})

Any ideas ?

EDIT: I had to put Platform.OS = 'ios' before the render in my test file for this to work. Still means there's an issue with Platform=android & jest :/

[alextorres94]

same here testing simulating android platform 😢

[huynhnhutlam]

Same issue on android platform