Most people are probably already aware of this fact, but you can test your Ansible-roles on multiple Ansible versions (e.g. 1.9 and 2.0) with the help of Travis.
This is done using environment variables. When multiple environment variables are specified, a build will be run for every variable!
You can take advantage of this if you specify each version of Ansible you want to test as a variable:
env:
- ANSIBLE_VERSION=latest
- ANSIBLE_VERSION=1.9.4
Then you just have to modify the install-part of the travis.yml-file to pip-install Ansible with the environment variable set as the version variable:
install:
- if [ "$ANSIBLE_VERSION" = "latest" ]; then pip install ansible; else pip install ansible==$ANSIBLE_VERSION; fi
Then (hopefully) your Travis CI tests will look like this:
You can get a full example on the travis-file in my ansible-test-framework!