Regression between 1.8.2 and 2.0.0

[bhvngt]

When I upgrade to 2.0.0, I get following error

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/sandbox/node_modules/svelte-je
ster/src/svelteconfig' imported from /sandbox/node_modules/svelte-jester/src/transformer.js

Here's the sandbox where this error can be seen.

If I revert svelte-jester to 1.8.2, sandbox gives a different error but the same code works fine in my local system.

[sebastianrothe]

I have the same issue. Working on a fix.

[winfr34k]

Hmm there still seems to be a bit of a problem. In our project, we still get stuff like this:

Jest: synchronous transformer .../node_modules/svelte-jester/src/transformer.js must export a "process" function.

Is this related or a separate issue?

[bhvngt]

@winfr34k you may want to refer to messages in this PR. You can also checkout this sandbox where its working as an ESM module in its glory with all kind of configurations :-)

[winfr34k]

Thank you, @bhvngt!
However, we seem to still have incompatible dependencies (jest-mock-extended), so we can't switch just yet...

If anyone is interested in a diff to what's changed in our svelte/kit project, have a look here: https://github.com/communityvi/communityvi/pull/126/files

[sebastianrothe]

Hmm there still seems to be a bit of a problem. In our project, we still get stuff like this:

Jest: synchronous transformer .../node_modules/svelte-jester/src/transformer.js must export a "process" function.

Is this related or a separate issue?

You will get this error, if Jest thinks something does not use ESM. Could be Typescript or another transformer.