Add some fixture utils ... #399

	name: CI

	on:
	pull_request:
	push:
	branches:
	- main
	schedule:
	- cron: '0 3 * * 0' # every Sunday at 3am

	env:
	CI: true

	jobs:
	lint_js:
	name: Lint JS
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: ./.github/actions/pnpm
	- name: ESLint
	run: pnpm lint

	test_type_checking:
	name: 'Tests: Type Check'
	timeout-minutes: 5
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- uses: ./.github/actions/pnpm
	- run: pnpm tsc --noEmit
	working-directory: tests

	tests:
	name: Tests
	timeout-minutes: 5
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	# how to say "not these" so we don't miss anything?
	# waiting on a an api from vitest for querying
	# the list of tests ahead of time before running them.
	#
	# It would be great if vitest had a flag to give us the JSON of all the tests,
	# so we could be sure we don't miss anything
	# and then generate this list from a previous C.I. job
	slow-test:
	- defaults with npm
	- defaults with yarn
	- defaults with pnpm

	# TypeScript
	- typescript with npm
	- typescript with yarn
	- typescript with pnpm

	# flags
	- addon-location
	- test-app-location
	- addon-only

	# existing monorepo
	- monorepo with npm
	- monorepo with yarn
	- monorepo with pnpm
	steps:
	- uses: actions/checkout@v3
	- uses: ./.github/actions/pnpm
	- run: pnpm add --global ember-cli yarn
	- run: pnpm vitest --testNamePattern "${{ matrix.slow-test }}"
	working-directory: tests

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