test: migrate `jest-runner-vscode` to `@vscode/test-cli` #819

	name: Testing

	on:
	push:
	branches:
	- main
	- v1.*
	pull_request:
	branches:
	- '**'

	jobs:
	test:
	name: Test for Stylelint ${{ matrix.stylelint }} on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]
	stylelint: [14, 15]
	timeout-minutes: 30
	permissions:
	contents: read
	steps:
	- uses: actions/checkout@v4

	- name: Set up Node.js
	uses: actions/setup-node@v4
	with:
	node-version-file: .nvmrc
	cache: npm

	- name: Install latest npm
	# TODO: npm 10 requires Node.js 18.17 or later.
	# run: npm install --global npm@latest
	run: npm install --global npm@9

	- name: Install dependencies
	run: npm ci

	- name: Install stylelint v15
	run: npm i -D stylelint@^15
	if: matrix.stylelint == 15

	- name: Install stylelint v14
	run: npm i -D stylelint@^14 stylelint-scss@^4.3.0
	if: matrix.stylelint == 14

	- name: Run unit tests
	run: npm run test:unit -- --coverage

	- name: Run integration tests
	run: npm run test:integration -- --coverage

	- name: Cache VS Code binaries
	uses: actions/cache@v4
	id: vscode-cache
	with:
	path: .vscode-test
	key: ${{ runner.os }}-vscode-${{ hashFiles('package.json') }}

	- name: Run end-to-end tests (Linux)
	if: runner.os == 'Linux'
	run: xvfb-run -a npm run test:e2e -- --silent

	- name: Run end-to-end tests (non-Linux)
	if: runner.os != 'Linux'
	run: npm run test:e2e -- --silent

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