  - name: Set variables to verify lookup_list
    set_fact: "{{ item if (item is string)|bool else item[0] }}={{ item }}"
    with_list:
      - a
      - [b, c]
      - d

  - name: Verify lookup_list
    assert:
      that:
          - a is defined
          - b is defined
          - c is not defined
          - d is defined
          - b is iterable and b is not string
          - b|length == 2
          - a == a
          - b == ['b', 'c']
          - d == d
