[plt-scheme] Using scheme-unit from DrScheme

Michael,

If you're referring to the "test suite" feature, here's an easy
answer: please take a look at the Tour (available off the Help Desk).
It has an entry on the test suites.  So, for example, write

(define (f x) (* x x))

in the Definitions window, then enter

(f 5)

in the expressions window, and

25

as the expected answer ...

Shriram