Yesterday we merged https://review.openstack.org/#/c/245984/ which adds content to the Neutron testing guidelines:

http://docs.openstack.org/developer/neutron/devref/development.environment.html#testing-neutron

The document details Neutron’s different testing infrastructures:

• Unit
• Functional
• Fullstack (Integration testing with services deployed by the testing infra itself)
• In-tree Tempest

The new documentation provides:

• Advantages and use cases for each testing framework
• Examples
• Do’s and don’ts
• Good and bad usage of mock
• The anatomy of a good unit test

It’s short – I encourage developers to go through it. Reviewers may save time by linking to it when testing anti-patterns pop up.

Enjoy, I hope you’ll find it useful.