Polyfills errors ==> type ErrorHandler

[jboteros]

Hello @jmespiz-addi, I had trouble adding testing with the polyfill.

You can evaluate the test and I'm still looking for a solution to continue with the development of the tests.

Thanks!

`➜ yarn test

yarn run v1.22.4
$ jest
FAIL tests/Loader.test.js
● Test suite failed to run

/Volumes/JboteroData/Master/Addi/uservalidation/node_modules/react-native/Libraries/polyfills/error-guard.js:14
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
     ^^^^^^^^^^^^

SyntaxError: Unexpected identifier

  at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1059:14)
  at Object.<anonymous> (node_modules/react-native/jest/setup.js:16:6)

FAIL tests/App.test.js
● Test suite failed to run

/Volumes/JboteroData/Master/Addi/uservalidation/node_modules/react-native/Libraries/polyfills/error-guard.js:14
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
     ^^^^^^^^^^^^

SyntaxError: Unexpected identifier

  at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1059:14)
  at Object.<anonymous> (node_modules/react-native/jest/setup.js:16:6)

FAIL tests/Switch.test.js
● Test suite failed to run

/Volumes/JboteroData/Master/Addi/uservalidation/node_modules/react-native/Libraries/polyfills/error-guard.js:14
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
     ^^^^^^^^^^^^

SyntaxError: Unexpected identifier

  at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1059:14)
  at Object.<anonymous> (node_modules/react-native/jest/setup.js:16:6)

FAIL tests/FromUser.test.js
● Test suite failed to run

/Volumes/JboteroData/Master/Addi/uservalidation/node_modules/react-native/Libraries/polyfills/error-guard.js:14
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
     ^^^^^^^^^^^^

SyntaxError: Unexpected identifier

  at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1059:14)
  at Object.<anonymous> (node_modules/react-native/jest/setup.js:16:6)

Test Suites: 4 failed, 4 total
Tests: 0 total
Snapshots: 0 total
Time: 0.772s
Ran all test suites.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
`

[jboteros]

Jest was replaced by Detox + Mocha.
Detox is a Gray box end-to-end testing and automation library for mobile apps.
https://github.com/wix/Detox