Docker can be quite convenient when building automated test rigs. It adds some of the features of unit testing but at a functional level. If your application consists of several server components in a cluster, you can simulate the entire cluster with a set of containers. Docker provides a virtual network for the cluster that makes clear how the containers interact at the network level.
Docker also makes it easy to restore a container to a known state. If you have your test database in a Docker container, you can easily restore the database to the same state as before the tests taking place. This is similar to restoring the environment in the After method in unit tests.
The Jenkins CI server has support for the ...
