Storyshots testing not working with Svelte

[etsiaDigital]

Using Storyshots auto testing fails

Using and following the Svelte tutorial:
https://storybook.js.org/tutorials/intro-to-storybook/svelte/en/simple-component/

Running Sample.test.js works fine.
Running storybook.test.js (created following tutorial instructions) fails with: "Jest encountered an unexpected token"

Details: .../node_modules/@storybook/svelte/dist/cjs/client/preview/SlotDecorator.svelte:1
    ({"Object.":function(module,exports,require,__dirname,__filename,global,jest){<script>
                                                                                                                                        ^
It appears that the precompile of the svelte file isn't happening.
I tried svelte-jester as an alternative (to jest-transform-svelte) and got these same results.

To Reproduce
Steps to reproduce the behavior:

1. Follow the Svelte tutorial. https://storybook.js.org/tutorials/intro-to-storybook/svelte/en/simple-component/
2. After the Snapshot Testing instructions are performed, run "yarn test" as instructed and I get the error.

Expected behavior
I believe this wouldn't happen if the precompile of the .svelte files occurred as expected so Jest was being fed JS as it requires.

[j3rem1e]

We can't ship precompiled js of the svelte files, because they should be compiled against the version on your project.

However, you just had to tell jest to transform files in @storybook/svelte :

transformIgnorePatterns: ['node_modules/(?!(@storybook/svelte)/)'],

[etsiaDigital]

This is why I opened an issue. I didn't know how to "tell jest to transform files in @storybook/svelte"
This should be in the default jest config.

Adding the following to package.json in the "jest" section fixed the issue:

"transformIgnorePatterns": ["node_modules/(?!(@storybook/svelte)/)"],