community.general/test/integration/targets/docker_swarm/tasks/test_swarm.yml

- name: Install Python requirements
  pip:
    state: present 
    name: "{{ item }}"
  with_items:
    - docker==2.7.0

- name: Test parameters with state=present
  docker_swarm:
    state: present
  ignore_errors: yes
  register: output

- name: assert failure when called with state=init and no advertise_addr
  assert:
    that:
       - 'output.failed'
       - 'output.msg == "advertise_addr is required to initialize a swarm cluster."'

- name: Test parameters with state=join
  docker_swarm:
    state: join
  ignore_errors: yes
  register: output

- name: assert failure when called with state=join and no advertise_addr,remote_addrs,join_token
  assert:
    that:
       - 'output.failed'
       - 'output.msg == "state is join but all of the following are missing: advertise_addr, remote_addrs, join_token"'

- name: Test parameters with state=remove
  docker_swarm:
    state: remove
  ignore_errors: yes
  register: output

- name: assert failure when called with state=remove and no node_id
  assert:
    that:
       - 'output.failed'
       - 'output.msg == "state is remove but all of the following are missing: node_id"'

- name: Create a Swarm cluster
  docker_swarm:
    state: present
    advertise_addr: "{{ansible_default_ipv4.address}}"
  register: output

- name: assert changed when create a new swarm cluster
  assert:
    that:
       - 'output.changed'
       - 'output.actions[0] | regex_search("New Swarm cluster created: ")'
       - 'output.swarm_facts.JoinTokens.Manager'
       - 'output.swarm_facts.JoinTokens.Worker'

- name: Remove a Swarm cluster
  docker_swarm:
    state: absent
    force: true
  register: output

- name: assert changed when remove a swarm cluster
  assert:
    that:
       - 'output.changed'
       - 'output.actions[0] == "Node has leaved the swarm cluster"'