In the case of the nuclear program, even if we assume that the TN design was only partially successful (according to western critics, the 2nd stage of the TN design failed to ignite),
Indian scientists would have known what *did not* work, and then subsequently using computer simulations, finalized designs to a higher confidence level of success. It could be said that India's TN bombs have not been tested as extensively as the Chinese ones have, however that hardly matters unless Chinese leaders are willing to call India's bluff in the event of a nuclear showdown.