ansible/test/integration/targets/groupby_filter/test_jinja2_groupby.yml

---
- name: Test jinja2 groupby
  hosts: localhost
  gather_facts: True
  connection: local
  vars:
    fruits:
      - name: apple
        enjoy: yes
      - name: orange
        enjoy: no
      - name: strawberry
        enjoy: yes
    expected: [[false, [{"enjoy": false, "name": "orange"}]], [true, [{"enjoy": true, "name": "apple"}, {"enjoy": true, "name": "strawberry"}]]]
  tasks:
    - name: show python interpreter
      debug:
         msg: "{{ ansible_python['executable'] }}"

    - name: show jinja2 version
      debug:
         msg: "{{ lookup('pipe', '{{ ansible_python[\"executable\"] }} -c \"import jinja2; print(jinja2.__version__)\"') }}"

    - set_fact:
        result: "{{ fruits | groupby('enjoy') }}"

    - assert:
        that:
          - result == expected