We never even opened the application, but we are already pretty sure that it works correctly, thanks to our tests.
Furthermore, we have a report that shows us that we covered 100% of the code. Although we have only tested the guessing game for three numbers, we covered all the possible branches.
We will never be sure that our software is free of bugs, but these kinds of tool help us developers a great deal in adding features to our software without having nightmares that we might have broken something.
