---
- hosts: localhost
  gather_facts: no
  vars:
    json_cache: "{{ cache.stdout | from_json }}"
  tasks:
    - command: redis-cli get ansible_facts_localhost
      register: cache
      tags:
        - always

    - name: test that the cache only contains the set_fact var
      assert:
        that:
          - "json_cache | length  == 1"
          - "json_cache.foo ==  ansible_facts.foo"
      tags:
        - set_fact

    - name: test that the cache contains gathered facts and the var
      assert:
        that:
          - "json_cache | length  > 1"
          - "json_cache.foo == 'bar'"
          - "json_cache.ansible_distribution is defined"
      tags:
        - additive_gather_facts

    - name: test that the cache contains only gathered facts
      assert:
        that:
          - "json_cache | length > 1"
          - "json_cache.foo is undefined"
          - "json_cache.ansible_distribution is defined"
      tags:
        - gather_facts