---
- hosts: localhost
  become_user: root
  become: true

  tasks:
    - ansible.builtin.debug:
        msg: hello

- hosts: localhost

  tasks:
    - name: Foo
      ansible.builtin.command: whoami
      become_user: postgres
      become: true
      changed_when: false

- hosts: localhost
  become: true

  tasks:
    - name: Accepts a become from higher scope
      ansible.builtin.command: whoami
      become_user: postgres
      changed_when: false

- hosts: localhost
  become_user: postgres

  tasks:
    - name: Accepts a become from a lower scope
      ansible.builtin.command: whoami
      become: true
      changed_when: false