Add undefined check. #269

	# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
	# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs

	name: pmpm tests

	on:
	- push
	- pull_request

	jobs:
	cache-and-install:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Install Node.js
	uses: actions/setup-node@v3
	with:
	node-version: 18

	- uses: pnpm/action-setup@v2
	name: Install pnpm
	id: pnpm-install
	with:
	version: 7
	run_install: \|
	- recursive: true
	args: [--no-frozen-lockfile]

	- name: Get pnpm store directory
	id: pnpm-cache
	shell: bash
	run: \|
	echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT

	- uses: actions/cache@v3
	name: Setup pnpm cache
	with:
	path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
	key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
	restore-keys: \|
	${{ runner.os }}-pnpm-store-

	- name: Build tooling
	run: pnpm run build

	- name: Run unit tests
	working-directory: ./packages/cli
	run: pnpm run test

Provide feedback