ansible variable type preservation test

type-test.yml

---
- name: type preservation test
  hosts: localhost
  sudo: no
  gather_facts: no

  vars:
    num_var: 5
    num_ref: "{{ num_var }}"
    num_cast_ref: "{{ num_var | int }}"
    bool_var: yes
    bool_ref: "{{ bool_var }}"
    nul: null
    null_ref: "{{ nul }}"
    null2: None
    null2_ref: "{{ null }}"

    var_map:
      num: "{{ num_var }}"
      num_ref: "{{ num_ref | int }}"
      num_ref_cast: "{{ num_ref | int }}"
      num_cast_ref: "{{ num_cast_ref }}"
      num_cast_ref_cast: "{{ num_cast_ref | int }}"
      bool_var: "{{ bool_var }}"
      bool_ref: "{{ bool_ref }}"
      nul: "{{ nul }}"
      null_ref: "{{ null_ref }}"

    null2_map:
      null2: "{{ null2 }}"
      null2_ref: "{{ null2_ref }}"

  tasks:
  - name: numeric type preservation test
    debug: var=var_map
  - name: "null evaluation failure"
    debug: var=null2_map