In Rackunit, I know how to assert that an exception is thrown:
#lang racket
(module+ test
(require rackunit)
(check-exn exn:fail:contract? (lambda () (3 + 4))))
However, I cannot find a way to assert something more specific. Looking at the exception hierarchy in Racket, exn:fail:contract
could mean a number of things: a wrong arity, a division by zero ...
I would like to assert in the test that this particular exception is one that reads:
; application: not a procedure;
; expected a procedure that can be applied to arguments
in its printed message. How do you accomplish this?
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