ansible-role-postgresql/tests/test.yml

---
- hosts: all

  vars:
    postgresql_databases:
      - name: example
    postgresql_users:
      - name: jdoe

  pre_tasks:
    - name: Update apt cache.
      apt: update_cache=yes
      when: ansible_os_family == 'Debian'

  roles:
    - role_under_test