community.general/test/integration/vars_file.yml

# this file is here to support testing vars_files in the blending tests only.
# in general define test data in the individual role:
#    roles/role_name/vars/main.yml

foo: "Hello"
things1:
    - 1
    - 2
things2:
    - "{{ foo }}"
    - "{{ foob | default('') }}"
vars_file_var: 321