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

- name: test with_subelements
  set_fact: "{{ '_'+ item.0.id + item.1 }}={{ item.1 }}"
  with_subelements:
    - "{{element_data}}"
    - the_list

- name: verify with_subelements results
  assert:
    that:
        - "_xf == 'f'"
        - "_xd == 'd'"
        - "_ye == 'e'"
        - "_yf == 'f'"

- name: test with_subelements in subkeys
  set_fact: "{{ '_'+ item.0.id + item.1 }}={{ item.1 }}"
  with_subelements:
    - "{{element_data}}"
    - the.sub.key.list

- name: verify with_subelements in subkeys results
  assert:
    that:
        - "_xq == 'q'"
        - "_xr == 'r'"
        - "_yi == 'i'"
        - "_yo == 'o'"

- name: test with_subelements with missing key or subkey
  set_fact: "{{ '_'+ item.0.id + item.1 }}={{ item.1 }}"
  with_subelements:
    - "{{element_data_missing}}"
    - the.sub.key.list
    - skip_missing: yes
  register: _subelements_missing_subkeys

- debug: var=_subelements_missing_subkeys
- debug: var=_subelements_missing_subkeys.results|length
- name: verify with_subelements in subkeys results
  assert:
    that:
        - _subelements_missing_subkeys.skipped is not defined
        - _subelements_missing_subkeys.results|length == 2
        - "_xk == 'k'"
        - "_xl == 'l'"

# Example from the DOCUMENTATION block
- set_fact:
    users:
      - name: alice
        authorized:
          - /tmp/alice/onekey.pub
          - /tmp/alice/twokey.pub
        mysql:
            password: mysql-password
            hosts:
              - "%"
              - "127.0.0.1"
              - "::1"
              - "localhost"
            privs:
              - "*.*:SELECT"
              - "DB1.*:ALL"
        groups:
          - wheel
      - name: bob
        authorized:
          - /tmp/bob/id_rsa.pub
        mysql:
            password: other-mysql-password
            hosts:
              - "db1"
            privs:
              - "*.*:SELECT"
              - "DB2.*:ALL"
      - name: carol
        skipped: true
        authorized:
          - /tmp/carol/id_rsa.pub
        mysql:
            password: third-mysql-password
            hosts:
              - "db9"
            privs:
              - "*.*:SELECT"
              - "DB9.*:ALL"


- name: Ensure it errors properly with non-dict
  set_fact:
    err: "{{ lookup('subelements', 9001, 'groups', wantlist=true) }}"
  ignore_errors: true
  register: err1

- assert:
    that:
      - err1 is failed
      - "'expects a dictionary' in err1.msg"

- name: Ensure it errors properly when pointing to non-list
  set_fact:
    err: "{{ lookup('subelements', users, 'mysql.password', wantlist=true) }}"
  ignore_errors: true
  register: err2

- assert:
    that:
      - err2 is failed
      - "'should point to a list' in err2.msg"

- name: Ensure it properly skips missing keys
  set_fact:
    err: "{{ lookup('subelements', users, 'mysql.hosts.doesnotexist', wantlist=true) }}"
  ignore_errors: true
  register: err3

- assert:
    that:
      - err3 is failed
      - "'should point to a dictionary' in err3.msg"

- name: Ensure it properly skips missing keys
  set_fact:
    err: "{{ lookup('subelements', users, 'mysql.monkey', wantlist=true) }}"
  ignore_errors: true
  register: err4

- assert:
    that:
      - err4 is failed
      - >-
        "could not find 'monkey' key in iterated item" in err4.msg        

- assert:
    that:
      - "'{{ item.0.name }}' != 'carol'"
  with_subelements:
    - "{{ users }}"
    - mysql.privs

- name: Ensure it errors properly when optional arg is nonsensical
  set_fact:
    err: neverset
  with_subelements:
    - "{{ users }}"
    - mysql.privs
    - wolves
  ignore_errors: true
  register: err5

- assert:
    that:
      - err5 is failed
      - "'the optional third item must be a dict' in err5.msg"

- name: Ensure it errors properly when given way too many args
  set_fact:
    err: neverset
  with_subelements:
    - "{{ users }}"
    - mysql.privs
    - wolves
    - foo
    - bar
    - baz
    - bye now
  ignore_errors: true
  register: err6

- assert:
    that:
      - err6 is failed
      - "'expects a list of two or three' in err6.msg"

- name: Ensure it errors properly when second arg is invalid type
  set_fact:
    err: neverset
  with_subelements:
    - "{{ users }}"
    - true
  ignore_errors: true
  register: err7

- assert:
    that:
      - err7 is failed
      - "'second a string' in err7.msg"

- name: Ensure it errors properly when first arg is invalid type
  set_fact:
    err: neverset
  with_subelements:
    - true
    - "{{ users }}"
  ignore_errors: true
  register: err8

- assert:
    that:
      - err8 is failed
      - "'first a dict or a list' in err8.msg"

- set_fact:
    empty_subelements: "{{ lookup('subelements', {'skipped': true}, 'mysql.hosts', wantlist=true) }}"

- assert:
    that:
      - empty_subelements == []

- set_fact:
    some_dict:
      key: "{{ users[0] }}"
      another: "{{ users[1] }}"

- name: Ensure it works when we give a dict instead of a list
  set_fact: "user_{{ item.0.name }}={{ item.1 }}"
  with_subelements:
    - "{{ some_dict }}"
    - mysql.hosts

- assert:
    that:
      - "'{{ user_alice }}' == 'localhost'"
      - "'{{ user_bob }}' == 'db1'"