community.general/tests/integration/targets/mysql_db/tasks/config_overrides_defaults.yml

- set_fact:
    db_to_create=testdb1
    config_file="/root/.my1.cnf"
    fake_port=9999
    fake_host="blahblah.local"

- name: Create custom config file
  shell: 'echo "[client]" > {{ config_file }}'

- name: Add fake port to config file
  shell: 'echo "port = {{ fake_port }}" >> {{ config_file }}'

- name: Create database using fake port to connect to, must fail
  mysql_db:
    name: '{{ db_to_create }}'
    state: present
    check_implicit_admin: yes
    config_file: '{{ config_file }}'
    config_overrides_defaults: yes
  ignore_errors: yes
  register: result

- name: Must fail because login_port default has beed overriden by wrong value from config file
  assert:
    that:
    - result is failed
    - result.msg is search("unable to connect to database")

- name: Create database using default port
  mysql_db:
    name: '{{ db_to_create }}'
    state: present
    check_implicit_admin: yes
    config_file: '{{ config_file }}'
    config_overrides_defaults: no
    login_unix_socket: '{{ mysql_socket }}'
  register: result

- name: Must not fail because of the default of login_port is correct
  assert:
    that:
    - result is changed

- name: Reinit custom config file
  shell: 'echo "[client]" > {{ config_file }}'

- name: Add fake host to config file
  shell: 'echo "host = {{ fake_host }}" >> {{ config_file }}'

- name: Remove database using fake login_host
  mysql_db:
    name: '{{ db_to_create }}'
    state: absent
    config_file: '{{ config_file }}'
    config_overrides_defaults: yes
  register: result
  ignore_errors: yes

- name: Must fail because login_host default has beed overriden by wrong value from config file
  assert:
    that:
    - result is failed
    - result.msg is search("Can't connect to MySQL server on '{{ fake_host }}'")

# Clean up
- name: Remove test db
  mysql_db:
    name: '{{ db_to_create }}'
    state: absent
    check_implicit_admin: yes
    login_unix_socket: '{{ mysql_socket }}'