Just candle it. You should be able to see if there is movement inside. The float test is supposedly to make it easier to see the movement. But the test is too easy to be wrong. The only way it is wonderful is if you see the egg bobble or move.
If it sinks, that does not guarantee death. If it floats, that does not guarantee life. Only if it moves in the water, that confirms life. Non-movement does not confirm death, they can be very still and not be dead.
(can you tell I hate the float test?) getting the egg wet is not a good idea either, if it is still viable.