Tests fails immediately after bootstrap

Version

3.0.1

Reproduction link

https://github.com/pomle/vue-test-fail-bug

Node and OS info

Node 10.2.1, Yarn 1.7.0

Steps to reproduce

1. Run vue create [app].
2. Run yarn run test:unit

Full cli output presented below.

➜ Development vue create amuse-alfre6

Vue CLI v3.0.1 ? Please pick a preset: Manually select features ? Check the features needed for your project: Babel, TS, Router, CSS Pre-processors, Linter, Unit, E2E ? Use class-style component syntax? Yes ? Use Babel alongside TypeScript for auto-detected polyfills? Yes ? Use history mode for router? (Requires proper server setup for index fallback in production) Yes ? Pick a CSS pre-processor (PostCSS, Autoprefixer and CSS Modules are supported by default): SCSS/SASS ? Pick a linter / formatter config: TSLint ? Pick additional lint features: Lint on save ? Pick a unit testing solution: Jest ? Pick a E2E testing solution: Cypress ? Where do you prefer placing config for Babel, PostCSS, ESLint, etc.? In package.json ? Save this as a preset for future projects? Yes ? Save preset as: pontus-first-vue-test

Vue CLI v3.0.1 ✨ Creating project in /Users/pom/Development/amuse-alfre6. 🗃 Initializing git repository… ⚙ Installing CLI plugins. This might take a while…

yarn install v1.7.0 info No lockfile found. [1/4] 🔍 Resolving packages… ⠁ (node:78925) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead. [2/4] 🚚 Fetching packages… [3/4] 🔗 Linking dependencies… [4/4] 📃 Building fresh packages… success Saved lockfile. ✨ Done in 164.43s. 🚀 Invoking generators… 📦 Installing additional dependencies…

yarn install v1.7.0 [1/4] 🔍 Resolving packages… ⠁ (node:78974) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead. [2/4] 🚚 Fetching packages… [3/4] 🔗 Linking dependencies… [4/4] 📃 Building fresh packages… success Saved lockfile. ✨ Done in 25.88s. ⚓ Running completion hooks…

📄 Generating README.md…

🎉 Successfully created project amuse-alfre6. 👉 Get started with the following commands:

$ cd amuse-alfre6 $ yarn serve

➜ Development cd amuse-alfre6 ➜ amuse-alfre6 git:(master) yarn run test:unit yarn run v1.7.0 $ vue-cli-service test:unit FAIL tests/unit/HelloWorld.spec.ts ● Test suite failed to run

/Users/pom/Development/amuse-alfre6/tests/unit/HelloWorld.spec.ts:3
import "core-js/modules/es6.array.iterator";
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

SyntaxError: Unexpected string

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

Test Suites: 1 failed, 1 total Tests: 0 total Snapshots: 0 total Time: 1.4s 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.

What is expected?

Test should succeed.

What is actually happening?

Tests fail.

[AlexandreBonaventure]

Don’t know if it’s related but with the new cypress 3.1.0 I get this error 'import' and 'export' may appear only with 'sourceType: module' inside the cypress UI. Works again when I downgrade the resolution to be @3.0.3

[Kocal]

Got the same issue when running Jest on TypeScript tests (importing TypeScripts files). Running jest with --no-cache seems to works.