name: environment variables
on: push

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Test on job level
        run: |
          echo \$UPPER=$UPPER
          echo \$upper=$upper
          echo \$LOWER=$LOWER
          echo \$lower=$lower
          [[ "$UPPER" = "UPPER" ]] || exit 1
          [[ "$upper" = "" ]] || exit 1
          [[ "$LOWER" = "" ]] || exit 1
          [[ "$lower" = "lower" ]] || exit 1
      - name: Test on step level
        run: |
          echo \$UPPER=$UPPER
          echo \$upper=$upper
          echo \$LOWER=$LOWER
          echo \$lower=$lower
          [[ "$UPPER" = "upper" ]] || exit 1
          [[ "$upper" = "" ]] || exit 1
          [[ "$LOWER" = "" ]] || exit 1
          [[ "$lower" = "LOWER" ]] || exit 1
        env:
          UPPER: upper
          lower: LOWER
    env:
      UPPER: UPPER
      lower: lower