Fix various opt-group handling issues #455

	name: Unit tests

	on:
	push:
	branches: [ main ]
	paths:
	- '.github/workflows/unit-tests.yml'
	- 'src/scripts/**'
	- 'src/*.ts'
	- 'test/**'
	- 'package-lock.json'
	- '.browserslistrc'
	- 'babel.config.json'
	- 'vitest.config.ts'
	pull_request:
	paths:
	- '.github/workflows/unit-tests.yml'
	- 'src/scripts/**'
	- 'src/*.ts'
	- 'test/**'
	- 'package-lock.json'
	- '.browserslistrc'
	- 'babel.config.json'
	- 'vitest.config.ts'

	jobs:
	test-unit:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 1

	- uses: actions/setup-node@v4
	with:
	node-version: 20
	cache: 'npm'

	- name: Install dependencies
	run: npm ci --no-audit
	env:
	HUSKY_SKIP_INSTALL: true

	- run: npm run build

	- run: npm run test:unit:coverage
	env:
	FORCE_COLOR: 2

	- name: Upload coverage to Codecov
	run: bash <(curl -s https://codecov.io/bash)
	-f ./coverage/lcov.info
	-B ${{ github.head_ref }}
	-C ${{ github.sha }}
	-Z \|\| echo 'Codecov upload failed'
	env:
	CI: true
	GITLAB_CI: true # pretend we are GitLab CI, while Codecov adding support for Github Actions
	CODECOV_ENV: github-action
	CODECOV_TOKEN: ${{secrets.CODECOV_TOKEN}}

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