- name: run first docs example
  apt_key:
    keyserver: keyserver.ubuntu.com
    id: 36A1D7869245C8950F966E92D8576A8BA88D21E9
  register: apt_key_test0
- debug: var=apt_key_test0

- name: re-run first docs example
  apt_key:
    keyserver: keyserver.ubuntu.com
    id: 36A1D7869245C8950F966E92D8576A8BA88D21E9
  register: apt_key_test1

- name: validate results
  assert:
      that:
          - 'apt_key_test0.changed is defined'
          - 'apt_key_test0.changed'
          - 'not apt_key_test1.changed'