ansible/test/integration/targets/win_power_plan/tasks/main.yml

- name: register os version (seems integration tests don't gather this fact)
  raw: powershell.exe "gwmi Win32_OperatingSystem | select -expand version"
  register: os_version
  changed_when: False
# ^^ seems "raw" is the only module that works on 2008 non-r2. win_command and win_shell both failed

- name: check if module fails gracefully when older than 2008r2
  win_power_plan:
    name: "high performance"
  when: os_version.stdout_lines[0] | version_compare('6.1','lt')
  check_mode: yes
  register: old_os_check
  failed_when: old_os_check.msg != 'The win_power_plan Ansible module is only available on Server 2008r2 (6.1) and newer'

- block:
  - name: register inactive power plan to test with
    win_shell: (Get-CimInstance -Name root\cimv2\power -Class win32_PowerPlan | ? {! $_.IsActive}).ElementName[0]
    register: disabled_power_plan
    changed_when: False

  - set_fact:
      name: "{{ disabled_power_plan.stdout_lines[0] }}"

  #Test that plan detects change is needed, but doesn't actually apply change
  - name: set power plan (check mode)
    win_power_plan:
      name: "{{ name }}"
    register: set_plan_check
    check_mode: yes

#  - debug:
#      var: set_plan_check

  - name: get result of set power plan (check mode)
    win_shell: (Get-CimInstance -Name root\cimv2\power -Class win32_PowerPlan -Filter "ElementName = '{{ name }}'").IsActive
    register: set_plan_check_result
    changed_when: False
    
  # verify that the powershell check is showing the plan as still inactive on the system
  - name: assert setting plan (check mode)
    assert:
      that:
      - set_plan_check|changed
      - set_plan_check_result.stdout == 'False\r\n'

  #Test that setting plan and that change is applied
  - name: set power plan
    win_power_plan:
      name: "{{ name }}"
    register: set_plan

  - name: get result of set power plan
    win_shell: (Get-CimInstance -Name root\cimv2\power -Class win32_PowerPlan -Filter "ElementName = '{{ name }}'").IsActive
    register: set_plan_result
    changed_when: False

  - name: assert setting plan
    assert:
      that:
      - set_plan|changed
      - set_plan_result.stdout == 'True\r\n'

  #Test that plan doesn't apply change if it is already set
  - name: set power plan (idempotent)
    win_power_plan:
      name: "{{ name }}"
    register: set_plan_idempotent

  - name: assert setting plan (idempotent)
    assert:
      that:
      - not set_plan_idempotent|changed

  when: os_version.stdout_lines[0] | version_compare('6.1','ge')
  always:
  - name: always change back plan to high performance when done testing
    win_power_plan:
      name: high performance