Switch tests to use Molecule.

.gitignore

@@ -1,2 +1,3 @@
 *.retry
-tests/test.sh
+*/__pycache__
+*.pyc

.travis.yml

@@ -1,28 +1,32 @@
 ---
+language: python
 services: docker
 
 env:
-  - distro: centos7
-  - distro: ubuntu1804
-  - distro: ubuntu1604
-  - distro: ubuntu1404
-  - distro: debian9
-  - distro: fedora27
+  global:
+    - ROLE_NAME: docker
+  matrix:
+    - MOLECULE_DISTRO: centos7
+      MOLECULE_DOCKER_COMMAND: /usr/lib/systemd/systemd
+    - MOLECULE_DISTRO: ubuntu1804
+    - MOLECULE_DISTRO: ubuntu1604
+    - MOLECULE_DISTRO: ubuntu1404
+    - MOLECULE_DISTRO: debian9
+    - MOLECULE_DISTRO: fedora27
+
+install:
+  # Install test dependencies.
+  - pip install molecule docker
+
+before_script:
+  # Use actual Ansible Galaxy role name for the project directory.
+  - cd ../
+  - mv ansible-role-$ROLE_NAME geerlingguy.$ROLE_NAME
+  - cd geerlingguy.$ROLE_NAME
 
 script:
-  # Configure test script so we can run extra tests after playbook is run.
-  - export container_id=$(date +%s)
-  - export cleanup=false
-
-  # Download test shim.
-  - wget -O ${PWD}/tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/
-  - chmod +x ${PWD}/tests/test.sh
-
   # Run tests.
-  - ${PWD}/tests/test.sh
-
-  # Test whether Docker is running correctly (Dockerception!).
-  - docker exec --tty ${container_id} docker run hello-world
+  - molecule test
 
 notifications:
   webhooks: https://galaxy.ansible.com/api/v1/notifications/

defaults/main.yml

@@ -6,11 +6,11 @@ docker_package_state: present
 
 # Service options.
 docker_service_state: started
-docker_service_enabled: yes
+docker_service_enabled: true
 docker_restart_handler_state: restarted
 
 # Docker Compose options.
-docker_install_compose: True
+docker_install_compose: true
 docker_compose_version: "1.22.0"
 docker_compose_path: /usr/local/bin/docker-compose
 
@@ -18,7 +18,7 @@ docker_compose_path: /usr/local/bin/docker-compose
 docker_apt_release_channel: stable
 docker_apt_arch: amd64
 docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
-docker_apt_ignore_key_error: True
+docker_apt_ignore_key_error: true
 
 # Used only for RedHat/CentOS/Fedora.
 docker_yum_repo_url: https://download.docker.com/linux/{{ (ansible_distribution == "Fedora") | ternary("fedora","centos") }}/docker-{{ docker_edition }}.repo

meta/main.yml

@@ -18,6 +18,7 @@ galaxy_info:
     - name: Debian
       versions:
         - jessie
+        - stretch
     - name: Ubuntu
       versions:
         - trusty

molecule/default/molecule.yml

@@ -0,0 +1,27 @@
+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+lint:
+  name: yamllint
+  options:
+    config-file: molecule/default/yaml-lint.yml
+platforms:
+  - name: instance
+    image: geerlingguy/docker-${MOLECULE_DISTRO:-centos7}-ansible
+    command: ${MOLECULE_DOCKER_COMMAND:-"sleep infinity"}
+    privileged: true
+    pre_build_image: true
+provisioner:
+  name: ansible
+  lint:
+    name: ansible-lint
+  playbooks:
+    converge: ${MOLECULE_PLAYBOOK:-playbook.yml}
+scenario:
+  name: default
+verifier:
+  name: testinfra
+  lint:
+    name: flake8

molecule/default/playbook.yml

@@ -1,13 +1,12 @@
 ---
-- hosts: all
+- name: Converge
+  hosts: all
+  become: true
 
   pre_tasks:
     - name: Update apt cache.
       apt: update_cache=yes cache_valid_time=600
       when: ansible_os_family == 'Debian'
 
-    - name: Install test dependencies.
-      package: name=curl state=present
-
   roles:
-    - role_under_test
+    - role: geerlingguy.docker

molecule/default/tests/test_default.py

@@ -0,0 +1,14 @@
+import os
+
+import testinfra.utils.ansible_runner
+
+testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
+    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')
+
+
+def test_hosts_file(host):
+    f = host.file('/etc/hosts')
+
+    assert f.exists
+    assert f.user == 'root'
+    assert f.group == 'root'

molecule/default/yaml-lint.yml

@@ -0,0 +1,6 @@
+---
+extends: default
+rules:
+  line-length:
+    max: 200
+    level: warning

tasks/docker-users.yml

@@ -3,5 +3,5 @@
   user:
     name: "{{ item }}"
     groups: docker
-    append: yes
+    append: true
   with_items: "{{ docker_users }}"

tasks/setup-Debian.yml

@@ -29,11 +29,11 @@
 - name: Add Docker apt key (alternative for older systems without SNI).
   shell: "curl -sSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -"
   args:
-    warn: no
+    warn: false
   when: add_repository_key is failed
 
 - name: Add Docker repository.
   apt_repository:
     repo: "{{ docker_apt_repository }}"
     state: present
-    update_cache: yes
+    update_cache: true

tests/README.md

@@ -1,11 +0,0 @@
-# Ansible Role tests
-
-To run the test playbook(s) in this directory:
-
-  1. Install and start Docker.
-  1. Download the test shim (see .travis.yml file for the URL) into `tests/test.sh`:
-    - `wget -O tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/`
-  1. Make the test shim executable: `chmod +x tests/test.sh`.
-  1. Run (from the role root directory) `distro=[distro] playbook=[playbook] ./tests/test.sh`
-
-If you don't want the container to be automatically deleted after the test playbook is run, add the following environment variables: `cleanup=false container_id=$(date +%s)`