ansible/test/integration/targets/check_mode/check_mode-on-cli.yml

---
# Run with --check
- hosts: testhost
  gather_facts: False
  tasks:
  - command: 'echo ran'
    register: command_out

  - name: check that this did not run in check mode
    assert:
      that:
      - '"check mode" in command_out["msg"]'

- hosts: testhost
  gather_facts: False
  check_mode: False
  tasks:
  - command: 'echo ran'
    register: command_out

  - name: check that play level check_mode overrode the cli
    assert:
      that:
      - '"ran" in command_out["stdout"]'

- hosts: testhost
  gather_facts: False
  tasks:
  - command: 'echo ran'
    register: command_out
    check_mode: False

  - name: check that task level check_mode overrode the cli
    assert:
      that:
      - '"ran" in command_out["stdout"]'