add-test-diff.yml

name: Add new tests to PR

on:
  pull_request:

jobs:
  test-diff:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Set up Node.js
        uses: actions/setup-node@v2
        with:
          node-version: 14

      - name: Install dependencies
        run: |
          echo //registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }} > .npmrc
          yarn --frozen-lockfile

      - name: Extract tests from origin branch
        run: |
          yarn extract tests.txt
          cat tests.txt | sort > origin_tests.txt
          rm tests.txt
        env:
          CI: true

      - name: Extract tests from destination branch
        run: |
          git fetch origin ${{ github.base_ref }}
          git checkout ${{ github.base_ref }}
          echo //registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }} > .npmrc
          yarn --frozen-lockfile
          yarn extract tests.txt
          cat tests.txt | sort > destination_tests.txt
          rm tests.txt
        env:
          CI: true

      - name: Compare tests
        run: |
          diff origin_tests.txt destination_tests.txt > tests_diff.txt || true

          touch new_tests.txt
          NEW_TESTS_LINES=$(cat tests_diff.txt | grep "<" | wc -l)
          if [ $NEW_TESTS_LINES -gt 0 ]; then
              echo "**New Tests**" > new_tests.txt
              echo "\`\`\`"  >> new_tests.txt
              cat tests_diff.txt | grep "<" >> new_tests.txt
              echo "\`\`\`"  >> new_tests.txt
          fi

          touch removed_tests.txt
          REMOVED_TESTS_LINES=$(cat tests_diff.txt | grep ">" | wc -l)
          if [ $REMOVED_TESTS_LINES -gt 0 ]; then
              echo "**Removed Tests**" > removed_tests.txt
              echo "\`\`\`"  >> removed_tests.txt
              cat tests_diff.txt | grep ">" >> removed_tests.txt
              echo "\`\`\`"  >> removed_tests.txt
          fi


          echo "### Tests difference:"  > comment.txt
          cat new_tests.txt >> comment.txt
          cat removed_tests.txt >> comment.txt
          cat comment.txt

      - name: PR comment with file
        uses: thollander/actions-comment-pull-request@v2
        with:
          filePath: comment.txt
          comment_tag: "Tests Difference"