ansible/test/integration/targets/delegate_to/test_delegate_to_loop_randomness.yml

---
- name: Integration tests for #28231
  hosts: localhost
  gather_facts: false
  tasks:
    - name: Add some test hosts
      add_host:
        name: "foo{{item}}"
        groups: foo
        ansible_connection: local
        ansible_python_interpreter: "{{ ansible_playbook_python }}"
      loop: "{{ range(10)|list }}"

    # We expect all of the next 3 runs to succeeed
    # this is done multiple times to increase randomness
    - assert:
        that:
          - item in ansible_delegated_vars
      delegate_to: "{{ item }}"
      loop:
        - "{{ groups.foo|random }}"
      ignore_errors: true
      register: result1

    - assert:
        that:
          - item in ansible_delegated_vars
      delegate_to: "{{ item }}"
      loop:
        - "{{ groups.foo|random }}"
      ignore_errors: true
      register: result2

    - assert:
        that:
          - item in ansible_delegated_vars
      delegate_to: "{{ item }}"
      loop:
        - "{{ groups.foo|random }}"
      ignore_errors: true
      register: result3

    - debug:
        var: result1

    - debug:
        var: result2

    - debug:
        var: result3

    - name: Ensure all of the 3 asserts were successful
      assert:
        that:
          - results is all
      vars:
        results:
          - "{{ (result1.results|first) is successful }}"
          - "{{ (result2.results|first) is successful }}"
          - "{{ (result3.results|first) is successful }}"

    - name: Set delegate
      set_fact:
        _delegate: '{{ groups.foo[0] }}'

    - command: "true"
      delegate_to: "{{ _delegate }}"
      register: result

    - assert:
        that:
          - result.stdout is defined
          - result.results is undefined