Added idempotence test and integration test via Travis.

.travis.yml

@@ -5,8 +5,11 @@ env:
   - SITE=test.yml
 before_install:
   - sudo apt-get update -qq
+  - sudo apt-get install -y curl
 install:
   - pip install ansible==1.5.0
 script:
   - ansible-playbook -i tests/inventory tests/$SITE --syntax-check
   - ansible-playbook -i tests/inventory tests/$SITE --connection=local --sudo
+  - ./tests/idempotence.sh
+  - curl http://localhost/

tests/idempotence.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Idempotency test for Ansible
+#
+# Runs an Ansible role/playbook, and makes sure no changes were made.
+#
+# @author Jeff Geerling, 2014
+
+# Change directory up one level (into project root).
+cd ../
+
+# Run playbook, and exit with 0 status if 'changed=0' found (good).
+ansible-playbook -i tests/inventory tests/$SITE --connection=local --sudo | grep -q 'changed=0' && exit 0
+
+# Exit with a non-zero status if 'changed=0' was not found.
+exit 1