ansible-roles/tomcat-instance/tests/test.yml

---
- hosts: test-kitchen
  vars:
    - tomcat_instance_mail: 'test@example.com'
    - tomcat_instance_deploy_user: 'deploy'
  roles:
  - { role: tomcat-instance, tomcat_instance_name: 'instance1', tomcat_instance_port: 8888, tomcat_instance_ram: 256 }