ansible/test/integration/targets/includes/include_role_missing.yml

- hosts: localhost
  gather_facts: no
  tasks:
  - file:
      path: roles/rolename
      state: "{{ item }}"
    loop:
      - absent
      - directory

  - name: ensure we fail when missing both file and tasks/ subdir
    block:
    - include_role:
        name: rolename
        tasks_from: missing.yml
    rescue:
      - set_fact:
          wefailed: True
    always:
      - name: check we actually failed
        assert:
          that: 
            - wefailed is defined
            - wefailed