Add unit tests for Shimmer component #71

	name: Build and test checks
	on:
	pull_request:
	branches: ["*"]
	jobs:
	build-and-test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Cache node modules
	id: cache-npm
	uses: actions/cache@v3
	env:
	cache-name: cache-node-modules
	with:
	# npm cache files are stored in `~/.npm` on Linux/macOS
	path: ~/.npm
	key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
	restore-keys: \|
	${{ runner.os }}-build-${{ env.cache-name }}-
	${{ runner.os }}-build-
	${{ runner.os }}-

	- if: ${{ steps.cache-npm.outputs.cache-hit != 'true' }}
	name: List the state of node modules
	continue-on-error: true
	run: npm list

	- name: Install dependencies
	run: npm ci

	- name: Create sample env
	run: cp .env.sample .env.local

	- name: Check format
	run: npm run check-format

	- name: Build
	run: npm run build

	- name: Test
	run: npm test

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