What is negative testing? Come up with an example in a mobile game.

Negative testing is the process of verifying a system’s robustness against incorrect, invalid, or unexpected input data and situations. The goal is to ensure that the application handles errors correctly and does not break.

An example in a mobile game: when entering a player’s name in the profile, forbidden characters or a very long string are entered. Negative testing will check that the game does not crash, but correctly displays an error or trims the name.