Module not found: '@vue/server-renderer' error with Mocha+Chai

[andyghiuta]

Steps to reproduce:

Scaffold a new app with vue create hello-vue3-mocha (Manually select)

(*) Choose Vue version
 (*) Babel
 ( ) TypeScript
 ( ) Progressive Web App (PWA) Support
 ( ) Router
 ( ) Vuex
 ( ) CSS Pre-processors
 (*) Linter / Formatter
>(*) Unit Testing
 ( ) E2E Testing

Please pick a preset: Manually select features
? Check the features needed for your project: Choose Vue version, Babel, Linter, Unit
? Choose a version of Vue.js that you want to start the project with 3.x (Preview)
? Pick a linter / formatter config: Airbnb
? Pick additional lint features: Lint on save
? Pick a unit testing solution: Mocha
? Where do you prefer placing config for Babel, ESLint, etc.? In dedicated config files
? Save this as a preset for future projects? (y/N)

cd hello-vue3-mocha

Run tests with npm run test:unit

Result:

> vue-cli-service test:unit

 WEBPACK  Compiling...

  [=========================] 98% (after emitting)

 ERROR  Failed to compile with 1 errors

This dependency was not found:

* @vue/server-renderer in ./node_modules/cache-loader/dist/cjs.js??ref--13-0!./node_modules/babel-loader/lib!./node_modules/vue-loader-v16/dist/templateLoader.js??ref--6!./node_modules/cache-loader/dist/cjs.js??ref--1-0!./node_modules/vue-loader-v16/dist??ref--1-1!./src/components/HelloWorld.vue?vue&type=template&id=469af010&scoped=true&bindings={"msg":"props"}

To install it, you can run: npm install --save @vue/server-renderer
  [=========================] 100% (completed)

 WEBPACK  Failed to compile with 1 error(s)

Error in ./src/components/HelloWorld.vue?vue&type=template&id=469af010&scoped=true&bindings={"msg":"props"}

  Module not found: '@vue/server-renderer' in 'D:\work\www\node\vue3-2\src\components'

 ERROR  mochapack exited with code 1.

Dependencies at the time of writing:

"dependencies": {
    "core-js": "^3.6.5",
    "vue": "^3.0.0-0"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/cli-plugin-eslint": "~4.5.0",
    "@vue/cli-plugin-unit-mocha": "~4.5.0",
    "@vue/cli-service": "~4.5.0",
    "@vue/compiler-sfc": "^3.0.0-0",
    "@vue/eslint-config-airbnb": "^5.0.2",
    "@vue/test-utils": "^2.0.0-0",
    "babel-eslint": "^10.1.0",
    "chai": "^4.1.2",
    "eslint": "^6.7.2",
    "eslint-plugin-import": "^2.20.2",
    "eslint-plugin-vue": "^7.0.0-0",
    "less": "^3.0.4",
    "less-loader": "^5.0.0"
  }

[cexbrayat]

Hi @ andyghiuta , thank you for opening this issue.

I can reproduce your issue, but this is probably not an issue with vue-test-utils-next (as I don't think we use server-renderer).

I think it might be an issue with vue-cli or more likely, with vue-loader: https://github.com/vuejs/vue-loader
Would you mind opening an issue there?

[andyghiuta]

@cexbrayat sure thing! Thanks!

[andyghiuta]

vuejs/vue-loader#1734