working unit test setup

workingunittest.rkt

#lang racket

(define a 10)

(module+ test
         (require rackunit)
        (check-equal? a 10 "making sure a is working")   
         )


(define b 20)

(module+ test
         (check-equal? b 20 "making sure b is 20")
         )


(module+ main
         (println "main is running")
         )