React-native: Tests failing on a newly created app

[cschroeter]

Is this a bug report?

yes

Have you read the Contributing Guidelines?

yes

Environment

react-native-cli: 2.0.1
react-native: 0.48.1
node: v8.4.0
yarn: 0.27.5

• Target Platform:
  iOs, Android

• Development Operating System:
  macOs Sierra 10.12.6

Steps to Reproduce

1. react-native init testapp
2. cd testapp
3. yarn test

Expected Behavior

Initially created tests should pass.

Actual Behavior

yarn test
yarn test v0.27.5
$ jest
 FAIL  __tests__/index.android.js
  ● Test suite failed to run

    TypeError: Cannot read property 'BLOB_URI_SCHEME' of undefined

      at Object.<anonymous> (node_modules/react-native/Libraries/Blob/URL.js:21:21)
      at node_modules/react-native/Libraries/Core/InitializeCore.js:174:40
      at getValue (node_modules/react-native/Libraries/Utilities/defineLazyObjectProperty.js:44:10)
      at ContextifyScript.Script.runInContext (vm.js:53:29)

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

    TypeError: Cannot read property 'BLOB_URI_SCHEME' of undefined

      at Object.<anonymous> (node_modules/react-native/Libraries/Blob/URL.js:21:21)
      at node_modules/react-native/Libraries/Core/InitializeCore.js:174:40
      at getValue (node_modules/react-native/Libraries/Utilities/defineLazyObjectProperty.js:44:10)
      at ContextifyScript.Script.runInContext (vm.js:53:29)

Test Suites: 2 failed, 2 total
Tests:       0 total
Snapshots:   0 total
Time:        0.95s
Ran all test suites.
error Command failed with exit code 1.

[shaundon]

I dropped back to version 0.47.x and this no longer happens - have you tried that?

[cschroeter]

@shaundon I just have migrated to the latest version. Tests passed on 0.47.1

[ghost]

Also this issue reproducible on node 8.4.0, but all works fine with node 7.4.0. You can use it how temporary workaround

[sir-gon]

I have the same tool versions in my stack.
I can confirm the issue :/

[timwangdev]

I created PR in #15843 to fix this issue.

[richardgirges]

Thanks to @timwangdev's PR, here are some temp workarounds that don't involve downgrading Node, until a release is cut with @timwangdev's fix.

WORKAROUND 1:
Overwrite ./node_modules/react-native/jest/setup.js with this: https://raw.githubusercontent.com/facebook/react-native/master/jest/setup.js

WORKAROUND 2:
WARNING: Risky! I didn't actually test this.

Install RN #master git branch:

"react-native": "git://github.com/facebook/react-native#master"

[timwangdev]

Another workaround does not involve change current RN files (I'm using) is:

Add https://github.com/facebook/react-native/blob/master/jest/setup.js#L112-L307 to your own project's jest-setup.js. This one will actually rewrite the mock for whole NativeModules.

You could remove those lines after the fix releases.

[Ashoat]

For anybody still experiencing this issue, note that it is fixed in 0.48.4. It can be closed now.

[timwangdev]

@facebook-github-bot close

[rsp8055]

[email protected] test /home/MyDemo
jest

FAIL __tests__/App.js
● Test suite failed to run

TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string

  at assertPath (path.js:28:11)
  at Object.relative (path.js:1249:5)

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

TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string

  at assertPath (path.js:28:11)
  at Object.relative (path.js:1249:5)

Test Suites: 2 failed, 2 total
Tests: 0 total
Snapshots: 0 total
Time: 0.47s
Ran all test suites.
npm ERR! Test failed. See above for more details

tried by various ways but could not found exact solution, even dont know the exact problem.