[racket] Unit testing of contracts

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Hello list.

I have a small set of contracts that I am thinking of turning into a
planet package so I can use them across projects. My problem is, how do
I use the rackunit framework to test them? Here is the first few
contracts that I want to test:

#lang racket

(provide bytes-len/c bytes-len</c bytes-len=/c)

(define (bytes-len/c len fn)
  (flat-contract
   (lambda (expr)
     (and bytes?
        (fn (bytes-length expr) len)))))

(define (bytes-len</c max-length)
  (bytes-len/c max-length <))

(define (bytes-len=/c length)
  (bytes-len/c length =))

Btw, I am also very open to suggestions about those contracts.
Thanks

- -- 
Eduardo Bellani

omnia mutantur, nihil interit.
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