test-changed-content.yml

name: Test changed content

# Renders changed pages and checks that deleted or renamed URLs still resolve before main-bound PRs merge.

on:
  pull_request:
    branches:
      # Megabranch PRs may skip deleted-page checks, but main-bound PRs must keep old URLs resolving.
      - main
    paths:
      - 'content/**'
      - .github/workflows/test-changed-content.yml

permissions:
  contents: read

jobs:
  test-changed-content:
    runs-on: ubuntu-latest
    if: ${{ github.repository == 'github/docs-internal' || github.repository == 'github/docs' }}
    steps:
      # Repeat each if on its step so skipped work still leaves the required check present.
      - name: Check out repo
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          # Fetch 2 commits so tj-actions/changed-files can diff without extra API calls
          fetch-depth: 2

      - uses: ./.github/actions/node-npm-setup

      - uses: ./.github/actions/get-docs-early-access
        if: ${{ github.repository == 'github/docs-internal' }}
        with:
          token: ${{ secrets.DOCS_BOT_PAT_BASE }}

      - uses: ./.github/actions/cache-nextjs

      - name: Run build script
        run: npm run build

      - name: Get changed files
        id: changed_files
        uses: tj-actions/changed-files@22103cc46bda19c2b464ffe86db46df6922fd323 # v47.0.5
        with:
          files: 'content/**'
          # all_old_new_renamed_files exposes old,new pairs for renames.
          # Without it, git status R files skip the deleted-file redirect check and old URLs 404.
          include_all_old_new_renamed_files: true

      - name: Run tests
        env:
          CHANGED_FILES: ${{ steps.changed_files.outputs.all_modified_files }}
          DELETED_FILES: ${{ steps.changed_files.outputs.deleted_files }}
          # Space-separated oldPath,newPath pairs; the test checks each old path like a deleted file.
          RENAMED_FILES: ${{ steps.changed_files.outputs.all_old_new_renamed_files }}
        run: npm test -- src/content-render/tests/render-changed-and-deleted-files.ts