Make spock.lang.Specification a Groovy trait

Originally reported on Google Code with ID 389

Describe the enhancement you have in mind.

Would it be possible to implement Specification as a Groovy trait instead of an abstract
class?  (The abstract class could be part of a separate release to maintain support
for versions of Groovy prior to 2.3).


Which particular problem would this enhancement solve for you?

I do a lot of work with Apache Camel, which requires all tests to extend the CamelTestSupport
class.  Since Spock requires extending from Specification, I am unable to write my
Camel tests using Spock.  And I think there are other projects that also expose test
functionality via an abstract class that all tests must extend.

If Specification was a Groovy trait instead of an abstract class, then I could do this
to write a spec for testing camel:

class MyCamelSpec extends CamelTestSupport implements Specification {...}


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Reported by mmindenhall on 2015-02-20 08:01:29

Start by locating spock.lang.Specification and reviewing how it currently serves as the base for Spock specifications. Check the compatibility implications of making it a Groovy trait, including the requested support for projects whose tests must extend another abstract class; done means such classes can implement Specification while existing supported Groovy versions remain addressed.