It would be beneficial to be able to abort an entire test execution gracefully through groovy. In my case I have an async operation that I kick off, delay a small period, check the status then it...
It would be nice to have this feature. But, I wonder if you could use a variable flag to tell other tests to fail. A groovy script could be used to check the flag and act on it.
Side note - The java library TestNG has Assert.fail() which allows you to do this. Unfortunately, you'll have to write all tests in programming language.
https://sqa.stackexchange.com/questions/2044/testng-mark-a-test-as-failed-if-a-particular-path-is-used