Add core tests & CI #1

	# Modified from https://github.com/gin-gonic/gin/blob/master/.github/workflows/gin.yml.

	name: Run Tests

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	permissions:
	contents: read

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version-file: "go.mod"
	check-latest: true
	- name: Setup golangci-lint
	uses: golangci/golangci-lint-action@v4
	with:
	version: v1.56.2
	args: --verbose
	test:
	needs: lint
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest]
	go: ["1.18", "1.19", "1.20", "1.21", "1.22"]
	name: ${{ matrix.os }} @ Go ${{ matrix.go }}
	runs-on: ${{ matrix.os }}
	env:
	GOPROXY: https://proxy.golang.org
	steps:
	- name: Set up Go ${{ matrix.go }}
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go }}
	cache: false

	- name: Checkout Code
	uses: actions/checkout@v4
	with:
	ref: ${{ github.ref }}

	- uses: actions/cache@v4
	with:
	path: \|
	${{ matrix.go-build }}
	~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-

	- name: Run Tests
	run: make test

	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v4
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	flags: ${{ matrix.os }},go-${{ matrix.go }}
	slug: ${{ github.repository }}

	- name: Format
	if: matrix.go-version == '1.22.x'
	run: diff -u <(echo -n) <(gofmt -d .)

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