Update tasks and Molecule tests to add/test functionality

Author: jsf9k

molecule/default/tests/test_default.py

@@ -4,15 +4,34 @@
 import os
 
 # Third-Party Libraries
-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("x", [True])
-def test_packages(host, x):
-    """Run a dummy test, just to show what one would look like."""
-    assert x
+def test_packages(host):
+    """Verify that the expected packages are installed/uninstalled."""
+    assert host.package(
+        "systemd-resolved"
+    ).is_installed, "The package systemd-resolved is not installed."
+    assert not host.package(
+        "resolvconf"
+    ).is_installed, "The package resolvconf is installed."
+
+
+def test_symlink(host):
+    """Verify that /etc/resolv.conf is the expected symlink."""
+    f = host.file("/etc/resolv.conf")
+    assert f.is_symlink, "/etc/resolv.conf is not a symlink."
+    assert (
+        f.linked_to == "/run/systemd/resolve/stub-resolv.conf"
+    ), "/etc/resolv.conf is not a symlink to /run/systemd/resolve/stub-resolv.conf."
+
+
+def test_services(host):
+    """Verify that the expected services are present."""
+    s = host.service("systemd-resolved.service")
+    assert s.exists, "systemd-resolved.service does not exist."
+    assert s.is_enabled, "systemd-resolved.service is not enabled."

tasks/main.yml

@@ -1,2 +1,28 @@
 ---
-# tasks file for skeleton
+- name: Install systemd-resolved
+  ansible.builtin.package:
+    name:
+      - systemd-resolved
+
+- name: Ensure resolvconf is not installed
+  ansible.builtin.package:
+    name:
+      - resolvconf
+    state: absent
+
+- name: Create /etc/resolv.conf symlink
+  ansible.builtin.file:
+    # If a file is already present at /etc/resolv.conf then just
+    # delete it.
+    force: true
+    group: root
+    mode: u=rw,g=r,o=r
+    owner: root
+    path: /etc/resolv.conf
+    src: /run/systemd/resolve/stub-resolv.conf
+    state: link
+
+- name: Enable systemd-resolved
+  ansible.builtin.service:
+    enabled: true
+    name: systemd-resolved.service