ansible/test/integration/targets/var_templating/test_connection_vars.yml

---
- hosts: localhost
  gather_facts: no
  vars:
    my_var:
      become_method: sudo
      connection: local
      become: 1
  tasks:

  - include_vars: "./vars/connection.yml"

  - command: whoami
    ignore_errors: yes
    register: result
    failed_when: result is not success and (result.module_stderr is defined or result.module_stderr is defined)

  - assert:
      that:
        - "'sudo' in result.module_stderr"
    when: result is not success and result.module_stderr is defined

  - assert:
      that:
        - "'Invalid become method specified'  not in result.msg"
    when: result is not success and result.msg is defined