---
- name: Verify
  hosts: all
  gather_facts: false
  any_errors_fatal: true
  vars:
    swapfile_path: "/swapfile"

  pre_tasks:
    - name: "Ensure 'file' exists"
      ansible.builtin.package:
        name: [file]
        state: present

  tasks:
    - name: "Check swapfile file type"
      register: swapfile_info
      changed_when: false
      ansible.builtin.command:
        cmd: "file {{ swapfile_path }}"

    - name: "Verify correct file type"
      ansible.builtin.assert:
        that: "'swap file' in swapfile_info.stdout"
        success_msg: "{{ swapfile_path }}: Indeed, a Linux swap file"
        fail_msg: "{{ swapfile_path }}: not a Linux swap file ('{{ swapfile_info.stdout }}')"