No, they are not doing such "flight test" more like a "joyride." They carried 42 passengers consisted of potential customer airline officials, technicians, would-be flight attendants, journalists, and Sukhoi's own team crew (8 people). So 50 victims in total.
It was a sight-seeing joy flight, bound for southern Java. They flew twice during that day, the morning flight was okay (said to be following the same route), my friend boarded that flight. The second flight resulted in this accident.