ansible/test/integration/targets/ansible-inventory/tasks/main.yml

- name: "No command supplied"
  command: ansible-inventory
  ignore_errors: true
  register: result

- assert:
    that:
        - result is failed
        - '"ERROR! No action selected, at least one of --host, --graph or --list needs to be specified." in result.stderr'

- name: "test option: --list --export"
  command: ansible-inventory --list --export
  register: result

- assert:
    that:
        - result is succeeded

- name: "test option: --list --yaml --export"
  command: ansible-inventory --list --yaml --export
  register: result

- assert:
    that:
        - result is succeeded

- name: "test option: --list --output"
  command: ansible-inventory --list --output junk.txt
  register: result

- name: stat output file
  stat:
      path: junk.txt
  register: st

- assert:
    that:
        - result is succeeded
        - st.stat.exists

- name: "test option: --graph"
  command: ansible-inventory --graph
  register: result

- assert:
    that:
        - result is succeeded

- name: "test option: --graph --vars"
  command: ansible-inventory --graph --vars
  register: result

- assert:
    that:
        - result is succeeded

- name: "test option: --graph with bad pattern"
  command: ansible-inventory --graph invalid
  ignore_errors: true
  register: result

- assert:
    that:
        - result is failed
        - '"ERROR! Pattern must be valid group name when using --graph" in result.stderr'

- name: "test option: --host localhost"
  command: ansible-inventory --host localhost
  register: result

- assert:
    that:
        - result is succeeded

- name: "test option: --host with invalid host"
  command: ansible-inventory --host invalid
  ignore_errors: true
  register: result

- assert:
    that:
        - result is failed
        - '"ERROR! Could not match supplied host pattern, ignoring: invalid" in result.stderr'