Ken Kousen spoke about Grails 3 testing a few weeks ago at the Austin Groovy and Grails User Group.
Here are some quick notes I took down:
Spock: You can add notes to when and then when: "Some conditions" then: "You should see some results" In console: make a list of lists, call combinations() also: Look up "unroll" for Spock - annotation CastleController, he uses a service, and makes it "def" instead of a type then in his test he can do Expando to mock instead of dealing with mocking stuff Plug-in: build-test-data
You’re welcome.