ansible/test/integration/roles/test_apt/tasks/apt.yml

# UNINSTALL
- name: uninstall wget with apt
  apt: pkg=wget state=absent purge=yes 
  register: apt_result

- name: check wget with dpkg
  shell: dpkg --get-selections | fgrep wget
  failed_when: False
  register: dpkg_result

- debug: var=apt_result
- debug: var=dpkg_result

- name: verify uninstallation of wget
  assert:
    that: 
        - "'changed' in apt_result"
        - "dpkg_result.rc == 1"

# UNINSTALL AGAIN
- name: uninstall wget with apt
  apt: pkg=wget state=absent purge=yes 
  register: apt_result

- name: verify no change on re-uninstall
  assert:
    that: 
        - "not apt_result.changed"

# INSTALL
- name: install wget with apt
  apt: name=wget state=present
  register: apt_result

- name: check wget with dpkg
  shell: dpkg --get-selections | fgrep wget
  failed_when: False
  register: dpkg_result

- debug: var=apt_result
- debug: var=dpkg_result

- name: verify installation of wget
  assert:
    that: 
        - "apt_result.changed"
        - "dpkg_result.rc == 0"

- name: verify apt module outputs
  assert:
    that:
        - "'invocation' in apt_result"
        - "'changed' in apt_result"
        - "'item' in apt_result"
        - "'stderr' in apt_result"
        - "'stdout' in apt_result"        
        - "'stdout_lines' in apt_result"        

# INSTALL AGAIN
- name: install wget with apt
  apt: name=wget state=present
  register: apt_result

- name: verify no change on re-install
  assert:
    that: 
        - "not apt_result.changed"