ansible/test/integration/targets/templating_lookups/template_deepcopy/playbook.yml

- hosts: h1
  gather_facts: no
  tasks:
    - set_fact:
        templated_foo: "{{ lookup('template', 'template.in') }}"

    - name: Test that the hostvar was templated correctly
      assert:
        that:
          - templated_foo == "foo\n"