Whether we do nuclear test or not, in the comming years, no country can attack another country with a nuclear bomb. So the only consolance of conducting nuclear tests are that it will be a technology demonstrator & deterent.
Then once any country supplies uranium, it will be practically difficult for it to take it back & stop fuel supplies.
The next bad thing that will happen now is that we will abandon our research programme oh thorium etc.. as most of the scientists are un-happy