Tagged template strings are not supported

If tagged template strings are used, test suit will fail with following error:

Tagged template strings are not supported. Use `transforms: { templateString: false }` to skip transformation and disable this error, or `transforms: { dangerousTaggedTemplateString: true }` if you know what you're doing (1:303)

      at Node.initialise (node_modules/vue-template-es2015-compiler/buble.js:12998:10)
          at Array.forEach (<anonymous>)
          at Array.forEach (<anonymous>)

Apparently, this error message is from buble.js. It seems that vue-jest uses vue-template-es2015-compiler, and vue-template-es2015-compiler uses buble. But neither vue-jest nor vue-template-es2015-compiler explains whether it is necessary and how to configure buble.

Is it possible to resolve this in vue-jest? Any fixes or explanations are appreciated. Thank you.

I created a sample project to illustrate the issue. Steps to reproduce:

1. clone https://github.com/mjss/vue-jest-with-tagged-template
2. run npm test:unit

[FRSgit]

Hey, I’ve added a fix (or rather - I’ve extended the vue-jest library to address this issue) and created a PR #288.

If you want to use it in your project where you have vue-jest as a direct dependency:

• remove the package with npm uninstall vue-jest or yarn remove vue-jest,
• add it back from my fork npm install --save-dev https://github.com/FRSource/vue-jest#feat-add-compile-template-options or yarn add -D https://github.com/FRSource/vue-jest#feat-add-compile-template-options.

Or if you’re using vue-jest via @vue/cli-plugin-unit-jest:

• add this to your package.json:

  "resolutions": {
    "**/vue-jest": "git+https://github.com/FRSource/vue-jest#feat-add-compile-template-options"
  }
  

• run yarn install.

And ofc stay updated on when the #288 would get merged into the master to switch back to the official vue-jest package!

[danrocha]

No, I gave up on the apollo components a while ago!