ansible/test/integration/targets/jinja2_native_types/test_dunder.yml

- name: test variable dunder
  set_fact:
      var_dunder: "{{ b_true.__class__ }}"

- assert:
    that:
        - 'var_dunder|type_debug == "type"'

- name: test constant dunder
  set_fact:
      const_dunder: "{{ true.__class__ }}"

- assert:
    that:
        - 'const_dunder|type_debug == "type"'

- name: test constant dunder to string
  set_fact:
      const_dunder: "{{ true.__class__|string }}"

- assert:
    that:
        - 'const_dunder|type_debug in ["str", "unicode", "NativeJinjaText"]'