2htdp/universe tests: use distinct port numbers

Using distinct port numbers allows the tests to run concurrently.
Using locally distnct port numbers is not a general solution,
of course, but it should work well enough for running these
tests with `raco test --drdr`.

pkgs/htdp-pkgs/htdp-test/2htdp/tests/name.rkt

@@ -11,6 +11,9 @@
 
 (define c (make-custodian))
 
+;; Distinct from other tests:
+(define PORT-NO 9006)
+
 (define-values (_ n)
   (parameterize ((current-custodian c))
     (launch-many-worlds
@@ -19,12 +22,14 @@
                (on-tick sub1)
                (to-draw (lambda (w) (empty-scene 200 200)))
                (name NAME)
-               (register LOCALHOST))
+               (register LOCALHOST)
+               (port PORT-NO))
      ;; --- universe: 
      (universe #f
                (on-new (lambda (u w) (make-bundle (iworld-name w) '() '())))
                (on-msg (lambda (u w m) (make-bundle u '() '())))
-               (on-tick (lambda (u) (make-bundle u '() '())) 1 1)))))
+               (on-tick (lambda (u) (make-bundle u '() '())) 1 1)
+               (port PORT-NO)))))
 
 (check-equal? n NAME)
 

pkgs/htdp-pkgs/htdp-test/2htdp/tests/on-tick-universe-with-limit.rkt

@@ -5,4 +5,6 @@
 (universe 0 
           (on-tick (lambda (w) (make-bundle (add1 w) '() '())) 1/28 3)
           (on-msg (lambda (w sender msg) (make-bundle w '() '())))
-          (on-new cons))
+          (on-new cons)
+          ;; Distinct from other tests:
+          (port 9000))

pkgs/htdp-pkgs/htdp-test/2htdp/tests/server-rename.rkt

@@ -5,4 +5,6 @@
   (uni:universe 0
     (uni:on-new cons)
     (uni:on-msg list)
-    (uni:on-tick add1)))
+    (uni:on-tick add1)
+    ;; Distinct from other tests:
+    (uni:port 9004)))

pkgs/htdp-pkgs/htdp-test/2htdp/tests/struct-universe.rkt

@@ -3,8 +3,13 @@
 (module shared racket/base
   (require 2htdp/universe 2htdp/image)
   
+  ;; Distinct from other tests:
+  (define PORT-NO 9003)
+
   (struct s (t) #:prefab)
-  (provide s s-t (all-from-out 2htdp/universe 2htdp/image)))
+
+  (provide s s-t (all-from-out 2htdp/universe 2htdp/image)
+           PORT-NO))
 
 (module client racket
   (require (submod ".." shared))
@@ -15,6 +20,7 @@
     (big-bang #true
               (to-draw (lambda (w) (text (if w "hello world" "good bye") 22 c)))
               (register LOCALHOST)
+              (port PORT-NO)
               #;
               (stop-when (lambda (w) (> count 3)))
               (on-receive 
@@ -40,7 +46,8 @@
                (lambda (state iw msg)
                  ;; display the received prefabbed struct's content 
                  (displayln (s-t msg))
-                 (make-bundle state '() '())))))
+                 (make-bundle state '() '())))
+              (port PORT-NO)))
   
   
   (provide server))

pkgs/htdp-pkgs/htdp-test/2htdp/tests/universe-receive.rkt

@@ -4,6 +4,9 @@
 (require 2htdp/universe)
 (require 2htdp/image)
 
+;; Distinct from other tests:
+(define PORT-NO 9002)
+
 ;; Nat Nat ->* World1 World2 [Listof IWorld]
 ;; launch a sending world, a receiving world, and a connecting universe
 (define (main rate limit)
@@ -30,7 +33,8 @@
      (universe '()
                (on-tick (lambda (s) (make-bundle s '() '())) 1 10)
                (on-new accept-another-world)
-	       (on-msg forward-message)))))
+               (on-msg forward-message)
+	       (port PORT-NO)))))
 
 ;; World1 = Number 
 
@@ -44,7 +48,8 @@
               (to-draw (draw 'red))
               (on-receive reset)
               (stop-when zero?)
-              (register LOCALHOST))))
+              (register LOCALHOST)
+              (port PORT-NO))))
 
 ;; World2 = Number 
 

pkgs/htdp-pkgs/htdp-test/2htdp/tests/universe-restart.rkt

@@ -3,18 +3,23 @@
 (module drop-on-message racket
   (require 2htdp/universe 2htdp/image)
 
+  ;; Distinct from other tests:
+  (define PORT-NO 9001)
+
   (define (u)
     (universe 0
               (on-new (lambda (u w) (make-bundle (+ u 1) '() '())))
               (on-tick (lambda (w) (make-bundle w '() '())) 1 3)
               (on-msg (lambda (u w m) (make-bundle (- u 1) '() (list w))))
-              (state #t)))
+              (state #t)
+              (port PORT-NO)))
   
   (define (w n)
     (big-bang 3
               [to-draw (lambda (w) (overlay (text (number->string w) 22 'black) (circle 100 'solid 'red)))]
               [on-tick (lambda (w) (if (<= w 1) (make-package 0 n) (- w 1)))]
               [register LOCALHOST]
+              [port PORT-NO]
               [name n]))
   
   (launch-many-worlds (u) (w "one") (w "two")))
@@ -24,6 +29,9 @@
 (module drop-bad racket
   (require 2htdp/universe 2htdp/image)
   
+  ;; Distinct from other tests:
+  (define PORT-NO 9005)
+
   (define *world* #false)
 
   (define (u)
@@ -33,13 +41,15 @@
               (on-msg (lambda (u w m) 
                         ;; set *world* to the first world that comes around, reuse
                         (unless *world* (set! *world* w))
-                        (make-bundle u '() (list *world*))))))
+                        (make-bundle u '() (list *world*))))
+              (port PORT-NO)))
   
   (define (w n)
     (big-bang 3
               [to-draw (lambda (w) (overlay (text (number->string w) 22 'black) (circle 100 'solid 'red)))]
               [on-tick (lambda (w) (if (= w 1) (make-package 0 n) (- w 1)))]
               [register LOCALHOST]
+              [port PORT-NO]
               [name n]))
   
   (launch-many-worlds (u) (w "one") (w "two") (w "three")))