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

- name: Get Jinja2 version
  set_fact:
    jinja2_version: >-
                                        {{ lookup('pipe', '{{ ansible_playbook_python }} -c "import jinja2; print(jinja2.__version__)"') }}

- name: Assert subset tests work
  assert:
    that:
      - "[1] is issubset([1, 2])"  # old name
      - "[1] is subset([1, 2])"
      - "[1] is not subset([2])"

- name: Assert superset tests work
  assert:
    that:
      - "[1, 2] is issuperset([1])"  # old name
      - "[1, 2] is superset([1])"
      - "[2] is not superset([1])"

- name: Assert contains tests work
  assert:
    that:
      - "[1] is contains(1)"
      - "[1] is not contains(2)"

- name: Assert nan tests work
  assert:
    that:
      - "'bad' is not nan"
      - "1.1 | float is not nan"

# Jinja2 versions prior to 2.10 will traceback when using: 'nan' | float
- name: Assert nan tests work (Jinja2 2.10+)
  assert:
    that:
      - "'nan' | float is isnan"  # old name
      - "'nan' | float is nan"
  when: jinja2_version is version('2.10', '>=')