Which tools use the "tests" directory in an Ansible role by default?

Question

The ansible-galaxy tool can create a skeleton of an Ansible role. (ansible-galaxy role init myrolename) Inside is a tests directory, but the Ansible documentation does not mention what it's for. Presumably tests of some sort, but who runs them, and how?

Answer 1

Travis CI.

The tests directory seems to have been added in 2015, in PR #13489, and its description makes it clear that it's for Travis. It also adds .travis.yml, which looks like it does nothing by default. Snippet:

script:
  # Basic role syntax check
  - ansible-playbook tests/test.yml -i tests/inventory --syntax-check

I am not aware of any other tools using it.