Thank you mcr23 !
Wednesday I did the test using GoldenCheetah. I couldn't find how to set up things as I wished, but I just looked at time and rode at the needed power. It's easy enough to select the hard effort to analyze, which I couldn't do in that Elite Drivo software! And It's easy to set up workouts with lots of detail, loved it!
I'll take a look at those other softwares this week, see if any of them comes with a nice test protocol, and if I can export data to GoldenCheetah later.