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

- command: echo {% raw %}{{ foo }}{% endraw %}
  register: result

- assert:
    that:
      - result.stdout_lines|first == expected
  vars:
    expected: !unsafe '{{ foo }}'

- name: Assert that templating can convert JSON null, true, and false to Python
  assert:
    that:
      - foo.null is none
      - foo.true is true
      - foo.false is false
  vars:
    # Kind of hack to just send a JSON string through jinja, by templating out nothing
    foo: '{{ "" }}{"null": null, "true": true, "false": false}'