bug: Cannot find module '@stencil/core/testing/jest-preset' after upgrading to Stencil 4.19.2

[geovanesantana]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Stencil Version

4.19.2

Current Behavior

This error occurs when trying to import moduleNameMapper from @stencil/core/testing/jest-preset in the Stencil configuration file:

import { moduleNameMapper } from '@stencil/core/testing/jest-preset';

### Expected Behavior

Should work as it did in previous versions, allowing the use of `moduleNameMapper` from `@stencil/core/testing/jest-preset`.

### System Info

```shell
Node 20.11.1
PNPM 9.3.0
CPU Model: Apple M3
Stencil: 4.19.2

Steps to Reproduce

1. Upgrade @stencil/core to version 4.19.2
2. Attempt imports moduleNameMapper from @stencil/core/testing/jest-preset
3. Observe the mentioned error

Code Reproduction URL

n/a

Additional Information

Error: Cannot find module
@tc/stencil-library:build:            '/Users/xxxx/Documents/work/cars/node_modules/@stencil/core/testing/jest-preset' at

[christian-bromann]

@geovanesantana would @stencil/core/testing/jest-preset.js work?

[geovanesantana]

Hey @christian-bromann,
Thanks for the help! It seems to work but I'm still getting some errors in other imports from @stencil/core, I'll check and get back with feedback.

[christian-bromann]

Thanks for validating @geovanesantana , I've raised a PR #5900 to fix the regression we've introduced.

[mattclough1]

Noticing the same thing with importing @stencil/core/compiler. I'm fixing currently by importing @stencil/core/compiler/stencil.js