How to know which teststep is running?

I would suggest a different approach. Instead of executing a Groovy script step and trying to figure out what ran beforehand, I would add the code in an event script (http://www.soapui.org/Scripting-Propert ... dlers.html) and then log a step name for each step that ran.

Or I would use a Script Assertion in each step where I would log/append the step name and just return "assert true"

Thanks,
Michael Giller
SmartBear Software