on: push
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      # " is not available for string literal delimiter
      - run: echo '${{ "hello" }}'
      # + operator does not exist
      - run: echo '${{ 1 + 1 }}'
      # Missing ')' paren
      - run: echo "${{ toJson(hashFiles('**/lock', '**/cache/') }}"
      # unexpected end of input
      - run: echo '${{ github.event. }}'
