added a test suite for the hangman teachpack

collects/tests/drracket/hangman.rkt

@@ -0,0 +1,21 @@
+#lang racket/base
+(require "drracket-test-util.rkt"
+         racket/class)
+
+(fire-up-drscheme-and-run-tests 
+ (λ ()
+   (define drs (wait-for-drscheme-frame))
+   (define defs (send drs get-definitions-text))
+   (define rep (send drs get-interactions-text))
+   (set-language-level! (list #rx"How to Design Programs" #rx"Beginning Student$"))
+   (send defs load-file (collection-file-path "hangman1.rkt" "htdp" "tests"))
+   (do-execute drs)
+   (insert-in-interactions drs "(hangman make-word reveal symbol?)")
+   (alt-return-in-interactions drs)
+   (define hangman-frame (wait-for-new-frame drs (list (send rep get-user-eventspace))))
+   (cond
+     [(equal? (send hangman-frame get-label) "Hangman")
+      (printf "Hangman test passed.\n")]
+     [else
+      (error 'hangman.rkt "expected a hangman frame to appear, but got one with the label ~s" 
+             (send hangman-frame get-label))])))