Add Travis CI test integration.

.travis.yml

@@ -0,0 +1,34 @@
+---
+language: python
+python: "2.7"
+
+env:
+  - SITE=test1.yml
+  - SITE=test2.yml
+
+before_install:
+  - sudo apt-get update -qq
+
+install:
+  # Install Ansible.
+  - pip install ansible==1.5.0
+
+  # Add ansible.cfg to pick up roles path.
+  - "printf '[defaults]\nroles_path = ../' > ansible.cfg"
+
+script:
+  # Check the role/playbook's syntax.
+  - "ansible-playbook -i tests/inventory tests/$SITE --syntax-check"
+
+  # Run the role/playbook with ansible-playbook.
+  - "ansible-playbook -i tests/inventory tests/$SITE --connection=local --sudo"
+
+  # Run the role/playbook again, checking to make sure it's idempotent.
+  - >
+    ansible-playbook -i tests/inventory tests/$SITE --connection=local --sudo
+    | grep -q 'changed=0.*failed=0'
+    && (echo 'Idempotence test: pass' && exit 0)
+    || (echo 'Idempotence test: fail' && exit 1)
+
+  # Check if munin is responding on port 4949.
+  - nc -z localhost 4949