Simple jest test fails with @exponent error

[bdickason]

I was going to take a stab at writing a few tests as I thought it might help me get to know the project (And get us some automated coverage so we don't have to manually test everything :P). Unfortunately, there is some weird behavior with the @exponent module and jest.

I've run through a few solutions so far:

1. Ignore the module from jest tests - this doesn't seem to work (still throws errors in other modules)
2. Install a patch to jest to monkey patch @exponent - this gives me errors in other modules (reactjs)
3. Manually monkey patch jest's linker - this still gives the same error
4. Try upgrading to the latest version of @expo (v3.0.0) - I still get the same error
5. Try upgrading to the latest version of react-native (because @expo v3.0.0 throws errors about react version mismatch) - I still get errors after doing this.

Error Log:

 FAIL  __tests__/index.ios.js
  ● Test suite failed to run

    /Users/bdickason/code/t7-chicken-native/node_modules/@expo/ex-navigation/src/ExNavigation.js:5
    export { default as NavigationProvider } from './ExNavigationProvider';
    ^^^^^^
    SyntaxError: Unexpected token export

      at transformAndBuildScript (node_modules/jest-runtime/build/transform.js:316:10)
      at Object.<anonymous> (index.ios.js:10:19)
      at Object.<anonymous> (__tests__/index.ios.js:3:15)

 FAIL  __tests__/index.android.js
  ● Test suite failed to run

    /Users/bdickason/code/t7-chicken-native/node_modules/@expo/ex-navigation/src/ExNavigation.js:5
    export { default as NavigationProvider } from './ExNavigationProvider';
    ^^^^^^
    SyntaxError: Unexpected token export

      at transformAndBuildScript (node_modules/jest-runtime/build/transform.js:316:10)
      at Object.<anonymous> (index.android.js:10:19)
      at Object.<anonymous> (__tests__/index.android.js:3:19)

Test Suites: 2 failed, 2 total
Tests:       0 total
Snapshots:   0 total
Time:        5.017s
Ran all test suites.

[dxn7335]

Hey @bdickason, there was a big change to transition our navigation routing from @exponent to using react-navigation. Possibly you can try testing again, and seeing if the same errors occur with the new setup?

The changes should be on develop. Also, nice to meet you!

[bdickason]

Will do!! I didn't even think to look at your branching strategy 👍

I'll check out develop and see how it looks.

Is there a writeup on how you handle branches and development anywhere that I can check out? (i.e. develop is always stable, master is always stable, etc)

[bdickason]

@dxn7335 I'm still getting this error on the develop branch as it looks like store.js still depends on @exponent.

See https://github.com/ndejesus1227/t7-chicken-native/blob/develop/src/redux/store.js#L1

[dxn7335]

@bdickason Oh! I just pushed a change to remove that reference. Looks like not everything might've gotten removed. I'll start picking out any leftover references out in the morning.

[bdickason]

This works as of @dxn7335's commits :) Still have some errors that are tough to debug, but I'm one step closer :D

[dayhaysoos]

@bdickason thanks man! Sorry I haven't gotten back to you yet about how things are running, but I think I'm gonna let you do your thing for now, if you have any questions at all please message me on Facebook.

[bdickason]

@ndejesus1227 no prob! I'm just poking around on things that are not critical path to learn the codebase and ramp up.