Compilation of ansible tasks useful to setup testing.

ansible_tests.yml

- name: is X package installed?
  command: dpkg-query -W -f='${Status}\n' X
  register: test
  changed_when: no
  failed_when: test.stdout.find('install ok installed') == -1

- name: file is present?
  command: test -e path_to_file
  changed_when: no

- name: file content contains X?
  command: grep 'X' path_to_file
  changed_when: no

- name: directory(ies) are present?
  command: "test -d {{ item }}"
  with_items:
    - /home/ubuntu
  changed_when: no

- name: file content contains line X?
  command: grep '^X$' path_to_file
  changed_when: no

- name: user(s) are present?
  command: "getent passwd {{ item }}"
  with_items:
    - ubuntu
  changed_when: no

- name: is command installed?
  shell: which command
  changed_when: no

- name: verify command version
  shell: command --version
  register: test
  changed_when: no
  failed_when: test is defined and test.stdout.find("command {{ command_version }} from") == -1