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- name: reset handler_called variable to false for all hosts
  set_fact:
    handler_called: False
  tags: scenario1

- name: notify the handler for host A only
  shell: echo
  notify:
    - set handler fact
  when: inventory_hostname == 'A'
  tags: scenario1

- name: force handler execution now
  meta: "flush_handlers"
  tags: scenario1

- debug: var=handler_called
  tags: scenario1

- name: validate the handler only ran on one host
  assert:
    that:
    - "inventory_hostname == 'A' and handler_called == True or handler_called == False"
  tags: scenario1

# item below is passed in by the playbook that calls this
- name: 'test notify with loop'
  debug: msg='a task'
  changed_when: item == 1
  notify: test handler
  tags: scenario2
