---
- vars:
    package_name: unarj
  block:
    - name: Make sure that {{ package_name }} is not installed
      pacman:
        name: '{{ package_name }}'
        state: absent

    - name: Install {{ package_name }} (check mode)
      pacman:
        name: '{{ package_name }}'
        state: present
      check_mode: true
      register: install_1

    - name: Install {{ package_name }}
      pacman:
        name: '{{ package_name }}'
        state: present
      register: install_2

    - name: Install {{ package_name }} (check mode, idempotent)
      pacman:
        name: '{{ package_name }}'
        state: present
      check_mode: true
      register: install_3

    - name: Install {{ package_name }} (idempotent)
      pacman:
        name: '{{ package_name }}'
        state: present
      register: install_4

    - assert:
        that:
          - install_1 is changed
          - install_1.msg == 'Would have installed 1 packages'
          - install_2 is changed
          - install_2.msg == 'Installed 1 package(s)'
          - install_3 is not changed
          - install_3.msg == 'package(s) already installed'
          - install_4 is not changed
          - install_4.msg == 'package(s) already installed'

    - name: Uninstall {{ package_name }} (check mode)
      pacman:
        name: '{{ package_name }}'
        state: absent
      check_mode: true
      register: uninstall_1

    - name: Uninstall {{ package_name }}
      pacman:
        name: '{{ package_name }}'
        state: absent
      register: uninstall_2

    - name: Uninstall {{ package_name }} (check mode, idempotent)
      pacman:
        name: '{{ package_name }}'
        state: absent
      check_mode: true
      register: uninstall_3

    - name: Uninstall {{ package_name }} (idempotent)
      pacman:
        name: '{{ package_name }}'
        state: absent
      register: uninstall_4

    - assert:
        that:
          - uninstall_1 is changed
          - uninstall_1.msg == 'Would have removed 1 packages'
          - uninstall_2 is changed
          - uninstall_2.msg == 'Removed 1 package(s)'
          - uninstall_3 is not changed
          - uninstall_3.msg == 'package(s) already absent'
          - uninstall_4 is not changed
          - uninstall_4.msg == 'package(s) already absent'