bug: incorrect TestingConfig/JestConfig type

[punit-shah]

Prerequisites

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

Stencil version

4.19.2

Current behavior

When setting certain properties in Stencil's testing config, such as restoreMocks: true, I get TypeScript errors.

Full list of properties in the JestConfig interface that are incompatible with Jest's Config type:

• bail
• globalSetup
• globalTeardown
• preset
• prettierPath
• resolver
• restoreMocks
• testRegex
• transform

Expected behavior

These errors should not occur. Setting this property to a boolean is correct, why does it expect a string?

Steps to reproduce

Set the testing.restoreMocks property in stencil.config.ts

export const config: Config = {
  // ...
  testing: {
        // ...
        restoreMocks: true,
    },
};

TypeScript will throw the following error:

Types of property 'restoreMocks' are incompatible.
  Type 'boolean' is not assignable to type 'string'.

Additional information

Looks like the JestConfig interface contains incorrect types.

stencil/src/declarations/stencil-public-compiler.ts

Line 1790 in 7ae36aa

export interface JestConfig {

Could this be updated to use the Config type directly from Jest, instead of defining your own interface?

import type { Config as JestConfig } from 'jest';

export interface TestingConfig extends JestConfig {
  // ...
}

[christian-bromann]

@punit-shah thanks for reporting. These types were updated in Jest but never revisited in Stencil. I raised a PR with an update.