Let's look at a simple example. Let's say we would like to test if some set of packages were installed within the role.

Ansible way

---

- name: Verify
  hosts: all

  tasks:
    - name: Gather the package manager facts
      package_facts:
        manager: auto

    - name: Assert that following packages are installed
      assert:
        that:
          - "'docker-ce' in ansible_facts.packages"
          - "'kubelet' in ansible_facts.packages"
          - "'kubectl' in ansible_facts.packages"
          - "'kubeadm' in ansible_facts.packages"

Testinfra way

import os
import pytest

import testinfra.utils.ansible_runner

testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')


@pytest.mark.parametrize('pkg', [
  'docker-ce',
  'kubelet',
  'kubectl',
  'kubeadm'
])
def test_pkg(host, pkg):
    package = host.package(pkg)

    assert package.is_installed