documentation: passing dynamic role variables to tests when runnning molecule verify

I know this could be batted away as something that is related to testinfra only, however, I am finding that I would like to ask here - would you accept a documentation PR that outlines a strategy for including role variables that you passed to your converge playbook, into your unit tests?

Here’s what I am currently doing:

# molecule/default/playbook.yml
---
- name: Converge
  hosts: all
  vars_files:
    - testvars.yml
  roles:
    - role: my-role
      foobar: "{{ test_foobar }}"

Then in a molecule/default/testvars.yml, I have:

---
test_foobar: barfoo

Then, in my molecule/default/tests/conftest.py, I do the following:

import os

import pytest
from testinfra.utils.ansible_runner import AnsibleRunner

DEFAULT_HOST = 'all'

inventory = os.environ['MOLECULE_INVENTORY_FILE']
runner = AnsibleRunner(inventory)
runner.get_hosts(DEFAULT_HOST)


@pytest.fixture
def testvars(host):
    variables = runner.run(
        DEFAULT_HOST,
        'include_vars',
        'testvars.yml'
    )
    return variables['ansible_facts']

And in my tests, I can then:

def test_something(host, testvars):
    print(testvars['test_foobar'])

As far as I can see, this is the cleanest way (I’ve digged around in a lot of tickets) of matching up the dynamic variables that you pass to your role and your testinfra pytest tests.

If it isn’t, please someone tell me 😃

In any case, the main question remains - is there a place we can start to document this on the RTD setup?

[dangoncalves]

OK thanks for the explaination. I was able to adapt your code to an usage with molecule. I just added the following code to my tests (it works like yours):

import pytest

@pytest.fixture
def get_vars(host):
    defaults_files = "file=../../defaults/main.yml name=role_defaults"
    vars_files = "file=../../vars/main.yml name=role_vars"

    ansible_vars = host.ansible(
        "include_vars",
        defaults_files)["ansible_facts"]["role_defaults"]

    ansible_vars.update(host.ansible(
        "include_vars",
        vars_files)["ansible_facts"]["role_vars"])

    return ansible_vars

Of course it could be very useful if this was integrated natively in Testinfra, but it could be not so easy because of the many use cases that users could encounter.

[camillehuot]

Also looking forward this capability 😃