community.general/test/integration/targets/tower_group/tasks/main.yml

- name: create a tempdir for hostvars
  local_action: shell mktemp -d
  register: tempdir

- name: write a file w/ hostvars
  local_action:
    module: lineinfile
    dest: "{{ tempdir.stdout }}/vars"
    line: '{"foo": "bar"}'
    create: true

- name: Create a Group
  tower_group:
    name: Some Group
    inventory: Demo Inventory
    state: present
    source: ec2
    variables: "@{{ tempdir.stdout }}/vars"
  register: result

- assert:
    that:
      - "result is changed"

- name: Delete a Group
  tower_group:
    name: Some Group
    inventory: Demo Inventory
    state: absent
  register: result

- assert:
    that:
      - "result is changed"