Is it reasonable to expect the engines first flight(other than the Russian testbed) within a year?
Doubtful, this program has been given very low priority for so many years now and its suffered....as seen by this long space of time between the first flying test bed tests with Russians earlier being ~ 10 years etc.
With catch up need (of larger jet engine propulsion ecosystem) and also trying to deploy it (dry version) on the Stealth UAV platform (which will also take some years to complete), it will probably proceed at its leisurely place, dependent on where things stand now with the FTB results whatever those are and the later feedback loop created from afterburner version.
India is unfortunately very red-tape bureaucrat heavy on a number of things and it costs India a lot. There was simply lot more intra-service consensus and impetus w.r.t: space, missiles, radars etc (where production was actually done to learn, iterate and take forward with concrete design freezes where needed) compared to jet propulsion and it shows.