docker_systemd_service/molecule/default/verify.yml

---
- name: Verify
  hosts: all
  gather_facts: true
  become: true
  tasks:
    - name: "Test: file /etc/default/nginx"
      block:
        - name: "Stat file /etc/default/nginx"
          ansible.builtin.stat:
            path: "/etc/default/nginx"
          register: stat_etc_default_nginx

        - name: "Slurp file /etc/default/nginx"
          ansible.builtin.slurp:
            src: "/etc/default/nginx"
          register: slurp_etc_default_nginx

        - name: "Verify file /etc/systemd/system/nginx_container.service"
          ansible.builtin.assert:
            that:
              - stat_etc_default_nginx.stat.exists
              - stat_etc_default_nginx.stat.isreg
              - stat_etc_default_nginx.stat.pw_name == 'root'
              - stat_etc_default_nginx.stat.gr_name == 'root'
              - stat_etc_default_nginx.stat.mode == '0600'
              - (slurp_etc_default_nginx.content|b64decode) == ''

    - name: "Test: service nginx_container"
      block:
        - name: "Get service nginx_container"
          ansible.builtin.service_facts:

        - name: "Stat file /etc/systemd/system/nginx_container.service"
          ansible.builtin.stat:
            path: "/etc/systemd/system/nginx_container.service"
          register: stat_etc_systemd_system_nginx_container_service

        - name: "Slurp file /etc/systemd/system/nginx_container.service"
          ansible.builtin.slurp:
            src: "/etc/systemd/system/nginx_container.service"
          register: slurp_etc_systemd_system_nginx_container_service

        - name: "Verify service nginx_container"
          vars:
            nginx_expected_service_file: |
              # Ansible managed: Do NOT edit this file manually!
              [Unit]
              After=docker.service
              PartOf=docker.service
              Requires=docker.service

              [Service]
              EnvironmentFile=/etc/default/nginx
              ExecStartPre=-/usr/bin/docker rm -f nginx
              ExecStart=/usr/bin/docker run --name nginx --rm --env-file /etc/default/nginx \
              \
              \
              \
              \
              \
              \
              \
              \
              \
              \
              \
              \
              \
              nginx
              ExecStop=/usr/bin/docker stop nginx
              SyslogIdentifier=nginx
              Restart=always
              RestartSec=10s

              [Install]
              WantedBy=docker.service
          ansible.builtin.assert:
            that:
              - stat_etc_systemd_system_nginx_container_service.stat.exists
              - stat_etc_systemd_system_nginx_container_service.stat.isreg
              - stat_etc_systemd_system_nginx_container_service.stat.pw_name == 'root'
              - stat_etc_systemd_system_nginx_container_service.stat.gr_name == 'root'
              - stat_etc_systemd_system_nginx_container_service.stat.mode == '0644'
              - (slurp_etc_systemd_system_nginx_container_service.content|b64decode) == nginx_expected_service_file
              - ansible_facts.services['nginx_container.service'] is defined
              - ansible_facts.services['nginx_container.service']['source'] == 'systemd'
              - ansible_facts.services['nginx_container.service']['state'] == 'inactive'
              - ansible_facts.services['nginx_container.service']['status'] == 'enabled'