Spock is a DSL based on Groovy, and is for writing run-able test specifications.

We are looking into standardizing on using Spock for test specifications in our automated system testing in several Java system projects.

But I can't find many success stories. Netflix Asgard [1] seems to use it, and the MongoDB project [1] seems to use it for their Java driver.

Also, the activity in the Spock project has been rather low the last two years or so.

[1] https://forums.manning.com/posts/list/35739.page