ansible/lib/ansible/plugins/test/changed.yml

DOCUMENTATION:
  name: changed
  author: Ansible Core
  version_added: "1.9"
  short_description: check if task required changes
  description:
    - Tests if task required changes to complete
    - This test checks for the existance of a C(changed) key in the input dictionary and that it is C(True) if present
  options:
    _input:
      description: registered result from an Ansible task
      type: dictionary
      required: True
EXAMPLES: |
  # test 'status' to know how to respond
  {{ (taskresults is changed }}  

RETURN:
  _value:
    description: Returns C(True) if the task was required changes, C(False) otherwise.
    type: boolean