"Don't know how to turn this value into a node" error from babel

[juzerzarif]

X-posted from #28:

Hate to be a party pooper but started using 1.3.1 and I'm now seeing "don't know how to turn this value into a node" from babel for one of my svelte files.

Here's the svelte file

<!-- NoResource.svelte -->
<script lang="ts">
  import Tumbleweed from './Tumbleweed.svelte';
</script>

<div class="h-full w-full flex flex-col justify-center items-center">
  <p class="snapshot-text text-4xl text-center font-semibold opacity-40 mb-6">
    Resource Does Not Exist
  </p>
  <div class="h-2/6 w-full opacity-40">
    <Tumbleweed />
  </div>
</div>

<style>
  .snapshot-text {
    font-family: 'Balsamiq Sans', cursive;
  }
</style>

Error stack trace

 /home/juzerzarif/Documents/terra-wdio-helper/src/webview-ui/common/NoResource.svelte: don't know how to turn this value into a node

      at valueToNode (node_modules/@babel/types/lib/converters/valueToNode.js:90:9)
      at Object.valueToNode (node_modules/@babel/types/lib/converters/valueToNode.js:84:58)
      at Object.exit (node_modules/istanbul-lib-instrument/dist/visitor.js:641:30)
      at PluginPass.exit (node_modules/babel-plugin-istanbul/lib/index.js:158:38)
      at newFn (node_modules/@babel/traverse/lib/visitors.js:175:21)
      at NodePath._call (node_modules/@babel/traverse/lib/path/context.js:55:20)
      at NodePath.call (node_modules/@babel/traverse/lib/path/context.js:42:17)
      at NodePath.visit (node_modules/@babel/traverse/lib/path/context.js:101:8)
      at TraversalContext.visitQueue (node_modules/@babel/traverse/lib/context.js:116:16)
      at TraversalContext.visitSingle (node_modules/@babel/traverse/lib/context.js:85:19)

This is the value that valueToNode receives as argument:

Will try to look more into exactly why this file fails and none of the other ones do when I get the time, any help troubleshooting is appreciated!

[sebastianrothe]

I'm having the same problem with the current version. In the jest Repo, someone had a similar issue with Vue jestjs/jest#10089
vuejs/vue-jest#275

Got it! And made a PR.

We just need a JSON.stringify() here https://github.com/mihar-22/svelte-jester/blob/23e4892e6a9e09c93bd3f3b8a01bb25bf86baa3c/src/transformer.js#L47