feat: add molecule role testing

molecule/default/converge.yml

@@ -0,0 +1,8 @@
+---
+
+- name: "converge"
+  hosts: "all"
+  become: true
+  gather_facts: true
+  roles:
+    - role: "siempie.dns"

molecule/default/molecule.yml

@@ -0,0 +1,44 @@
+---
+
+dependency:
+  name: "galaxy"
+
+driver:
+  name: "docker"
+
+platforms:
+
+  # debian 12
+  - name: "debian-12"
+    image: "geerlingguy/docker-debian12-ansible:latest"
+    pre_build_image: true
+    privileged: true
+    volumes:
+      - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
+    command: "/lib/systemd/systemd"
+
+  # ubuntu 22
+  - name: "ubuntu-22"
+    image: "geerlingguy/docker-ubuntu2204-ansible:latest"
+    pre_build_image: true
+    privileged: true
+    volumes:
+      - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
+    command: "/lib/systemd/systemd"
+
+  # ubuntu 24
+  - name: "ubuntu-24"
+    image: "geerlingguy/docker-ubuntu2404-ansible:latest"
+    pre_build_image: true
+    privileged: true
+    volumes:
+      - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
+    command: "/lib/systemd/systemd"
+
+provisioner:
+  name: "ansible"
+  env:
+    ANSIBLE_REMOTE_TMP: "/tmp"
+
+verifier:
+  name: "ansible"

molecule/default/verify.yml

@@ -0,0 +1,22 @@
+---
+
+# verify
+- name: "verify"
+  hosts: "all"
+  become: true
+  gather_facts: true
+  tasks:
+
+    # check if unbound is installed
+    - name: "check package"
+      ansible.builtin.package:
+        name: "unbound"
+        state: "present"
+      check_mode: true
+
+    # check if unbound is started
+    - name: "check service"
+      ansible.builtin.service:
+        name: "unbound"
+        state: "started"
+      check_mode: true