- name: The value of a variable can be computed from a Jinja template, stored in a file
  gather_facts: no
  hosts: localhost
  vars:
    foo: 'bar'
    myname: 'Nicolas'
    output: '{{ lookup(''template'', ''output.j2'') }}'
  tasks:
  - debug:
      var: 'output'
  - assert:
      that:
      - output == 'Hello Nicolas, foo = bar'