ansible/test/integration/targets/facts_linux_network/tasks/main.yml

- block:
    - name: Add IP to interface
      command: ip address add 100.42.42.1/32 dev {{ ansible_facts.default_ipv4.interface }}
      ignore_errors: yes

    - name: Gather network facts
      setup:
        gather_subset: network

    - name: Ensure broadcast is reported as empty
      assert:
        that:
          - ansible_facts[ansible_facts['default_ipv4']['interface']]['ipv4_secondaries'][0]['broadcast'] == ''

  always:
    - name: Remove IP from interface
      command: ip address delete 100.42.42.1/32 dev {{ ansible_facts.default_ipv4.interface }}
      ignore_errors: yes