Merge pull request #951 from Automattic/close-room-screens #2029

	# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions

	# yarn cache setup from https://www.karltarvas.com/2020/12/09/github-actions-cache-yarn-install.html

	name: Code checks

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	runs-on: ubuntu-latest

	strategy:
	matrix:
	node-version: [18.1.0]

	steps:
	- name: Checkout source
	uses: actions/checkout@v2
	- name: Install tools
	uses: actions/setup-node@v2
	with:
	node-version: ${{ matrix.node-version }}
	# See: https://github.com/actions/cache/blob/main/examples.md#node---yarn
	- name: Get Yarn cache directory
	id: yarn-cache-dir-path
	run: echo "::set-output name=dir::$(yarn cache dir)"
	- name: Use Yarn cache
	uses: actions/cache@v2
	id: yarn-cache
	with:
	path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
	key: ${{ runner.os }}-yarn-${{ matrix.node-version }}-${{ hashFiles('**/yarn.lock') }}
	- name: Install dependencies
	run: yarn install --prefer-offline --frozen-lockfile
	- name: Unit tests
	run: yarn test
	- name: Lint
	run: yarn run lint-ci
	- name: Typescript
	run: yarn run tsc

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