test a bash script with gradle

we're using gradle as build tool and for our java and ansible projects. Now I would like to test a bash script from within gradle as well.

Do you have any tipps/resources or better even an example how I can test a bash script using gradle? It can be as simple as executing the script and having the "test" pass, if the return value of the bash script under test is 0 or if the stdout or stderr contain certain strings (or don't contain them).

Thanx a lot in advance for your help!