Behavioral testing

Behavioral testing checks if an application behaves as intended in realistic situations. 
It resembles real-world use case testing in that we check how users will use the application. The difference being that behavioral testing tests a specific functionality while real-world use case testing tests an entire workflow. 
It resembles unit testing as both test a granluar part of the application. The difference being the perspective, unit testing is from the viewpoint of the code, where behavioral testing is from the viewpoint of the user.
It's a test technique that lends itself very well for testing generative AI applications, for example how well the instructions in the input have been followed to create the output.