Default unit tests are failing

[maxpou]

Version

3.0.0-rc.5

Reproduction link

https://codesandbox.io/s/vue

Steps to reproduce

vue create vue-jest
? Please pick a preset: Manually select features
? Check the features needed for your project: Babel, Router, Vuex, Linter, Unit
? Pick a linter / formatter config: Basic
? Pick additional lint features: Lint on save
? Pick a unit testing solution: Jest
? Where do you prefer placing config for Babel, PostCSS, ESLint, etc.? In dedicated config files
? Save this as a preset for future projects? No

duplicate HelloWorld.spec.js (i.e. Users.spec.js)

What is expected?

test should pass.

What is actually happening?

 FAIL  tests/unit/Users.spec.js
  ● Test suite failed to run

    /lab/vue-jest/tests/unit/Users.spec.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import "core-js/modules/es6.array.iterator";
                                                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    SyntaxError: Unexpected string

      at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:403:17)

---

In jest.config.js I added cache: false to solve the error.
Other information:

• yarn v 1.6.0
• node v10.1.0
• macos High Sierra

[amishpr]

I am getting a similar error as well, expect mine says SyntaxError: Unexpected token import

This may be related to this issue:

#1524 (comment)

[yyx990803]

Can't reproduce with Yarn 1.7 & Node 10.3.0 on macOS. Try upgrading Yarn?

[maxpou]

I'm now with yarn 1.7. Problem persist. Same output.
I tried without yarn: rm -rf node_modules && npm i && npm run test:unit. Idem: same output. (using npm v 6.1.0)

[amishpr]

The problem seems to be with the environment variables VUE_CLI_BABEL_TARGET_NODE and VUE_CLI_BABEL_TRANSPILE_MODULES. If they are set to true, the issue goes away.

Jianwu Chen on stackoverflow.com found this solution:

https://stackoverflow.com/questions/51365250/run-jest-got-unexpected-string-at-scripttransformer-transformandbuildscript

[yyx990803]

Are you running jest directly? That's not supposed to work. You must run it via vue-cli-service test:unit.

[yyx990803]

@javacoldbrew FYI just landed cd88cfa which allows you to debug vue-cli-service test:unit via Node inspector.

[amishpr]

@yyx990803 I feel silly, I am pretty sure that was my problem. I was running the tests through IntelliJ's Jest runner which just calls jest directly, which would sometimes work.

I will double check and get back to you tomorrow and see if I still get the error when using yarn run test:unit.

Anyways, thank you for all your help!