test: improve coverage and document unreachable branches #16

	name: ci

	on:
	pull_request:
	push:
	branches: [main]

	env:
	GO_VERSION: 1.22

	concurrency:
	group: ci-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v5
	with:
	go-version: ${{ env.GO_VERSION }}
	- name: Install golangci-lint
	run: curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh \| sh -s -- -b $(go env GOPATH)/bin
	- name: Install shadow
	run: go install golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow@latest
	- name: Run linters
	run: make lint

	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v5
	with:
	go-version: ${{ env.GO_VERSION }}
	- name: Run tests
	run: make test

	readme:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v5
	with:
	go-version: ${{ env.GO_VERSION }}

	- name: Try to update README.md
	run: go run tools/update_readme.go
	- name: Check for changes
	run: \|
	if [[ -n $(git status --porcelain) ]]; then
	echo "❌ Error: README.md is not up to date. Please run \`go run tools/update_readme.go\`."
	git status --porcelain
	git diff
	exit 1
	else
	echo "✅ README.md is up to date."
	fi

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