ansible/test/integration/targets/plugin_loader/normal/underscore.yml

- hosts: testhost
  gather_facts: false
  tasks:
    - name: Load a deprecated module
      underscore:
      register: res

    - name: Load a deprecated module that is a symlink
      symlink:
      register: sym

    - assert:
        that:
          - res.source == 'legacy_library_dir'
          - sym.source == 'legacy_library_dir'