check-test-changes.yml

name: Check for Test Changes

on:
  pull_request:
    types: [ opened, synchronize, reopened ]

jobs:
  check-tests:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Get list of changed files
        id: changed-files
        uses: actions/github-script@v7
        with:
          script: |
            const { data: pullRequest } = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.payload.pull_request.number,
            });

            const { data: files } = await github.rest.pulls.listFiles({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.payload.pull_request.number,
            });

            const goFiles = files.filter(file => file.filename.endsWith('.go') && !file.filename.endsWith('_test.go'));
            const testFiles = files.filter(file => file.filename.endsWith('_test.go'));

            core.setOutput('goFiles', goFiles.map(file => file.filename).join(','));
            core.setOutput('testFiles', testFiles.map(file => file.filename).join(','));

      - name: Check for test changes
        run: |
          echo "Number of go files changed:"
          echo "${{ steps.changed-files.outputs.goFiles }}" | tr ',' '\n' | grep -v '^$' | wc -l
          echo "Number of test files changed:"
          echo "${{ steps.changed-files.outputs.testFiles }}" | tr ',' '\n' | grep -v '^$' | wc -l
          if [ "${{ steps.changed-files.outputs.goFiles }}" != "" ] && [ "${{ steps.changed-files.outputs.testFiles }}" == "" ]; then
            echo "There are changes to .go files but no changes to _test.go files."
            exit 1
          else
            echo "Test files changed:"
            echo "${{ steps.changed-files.outputs.testFiles }}" | tr ',' '\n'
          fi