summary: Ensure that the core systems have a special apt placeholder

details: |
  Check apt command is not available in uc20+ and there is a fake apt-get script
  for uc16 and uc18.

systems: [ubuntu-core-*]

execute: |
  case "$SPREAD_SYSTEM" in
    ubuntu-core-16-*|ubuntu-core-18-*)
      echo "Check some core systems have the fake apt-get script."
      apt-get | MATCH "Ubuntu Core does not use apt-get, see 'snap --help'!"
      not apt-get
     ;;
    ubuntu-core-*)
      echo "Check other systems do not have the fake apt-get script."
      test "$(command -v apt-get)" = ""
      ;;
  esac
