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feat(pr-size): opt-in exclude_tests so the cap measures production code (BE-6791) #35

	name: Test pr-size script

	# Runs the Go unit tests (+ gofmt/vet) for the PR-size checker behind
	# pr-size.yml. The checker gates every consumer repo's PRs, so a counting
	# regression silently blocks (or waves through) PRs org-wide — cheap to guard
	# with a unit run on change.

	on:
	pull_request:
	paths:
	- 'scripts/check-pr-size/**'
	- '.github/workflows/test-pr-size.yml'
	push:
	branches: [main]
	paths:
	- 'scripts/check-pr-size/**'
	- '.github/workflows/test-pr-size.yml'

	permissions:
	contents: read

	jobs:
	test:
	name: go test
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: scripts/check-pr-size
	steps:
	- name: Checkout
	uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
	with:
	persist-credentials: false

	- name: Set up Go
	uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
	with:
	go-version-file: scripts/check-pr-size/go.mod
	# The module is dependency-free (no go.sum) — nothing to cache.
	cache: false

	- name: gofmt
	run: \|
	UNFORMATTED="$(gofmt -l .)"
	if [ -n "$UNFORMATTED" ]; then
	echo "gofmt needed on:"
	echo "$UNFORMATTED"
	exit 1
	fi

	- name: go vet
	run: go vet ./...

	- name: go test
	run: go test ./...