From 68c197d02fd60c7607a889db93db7c2228400b0b Mon Sep 17 00:00:00 2001
From: James Swaine <jamesswaine@racket-lang.org>
Date: Fri, 29 Jan 2010 21:44:46 +0000
Subject: [PATCH] added basic test suite for the parallel futures module

svn: r17890
---
 collects/tests/mzscheme/future.ss | 110 ++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 collects/tests/mzscheme/future.ss

diff --git a/collects/tests/mzscheme/future.ss b/collects/tests/mzscheme/future.ss
new file mode 100644
index 0000000000..01ba92b82e
--- /dev/null
+++ b/collects/tests/mzscheme/future.ss
@@ -0,0 +1,110 @@
+(load-relative "loadtest.ss")
+
+(Section 'future)
+(require scheme/future)
+
+;; ----------------------------------------
+
+(test 2 
+      touch 
+       (future (λ () 
+                 2)))
+
+(let ([f1 (future (λ () (+ 2 2)))] 
+            [f2 (future (λ () (+ 5 3)))]) 
+        (test 12 + (touch f2) (touch f1)))
+
+(let* ([v 5]
+             [f1 (future (λ () 
+                           (set! v 10) 
+                           v))]) 
+        (test 10 touch f1))
+
+(define (build-rand-list lst len) 
+  (case len 
+    [(0) lst] 
+    [else 
+     (build-rand-list (cons 
+                       (random) 
+                       lst) 
+                      (- len 1))]))
+
+(define (append-list-of-lists acc lst) 
+  (cond 
+    [(empty? lst) acc] 
+    [else 
+      (append-list-of-lists 
+        (append acc (first lst)) 
+        (rest lst))]))
+  
+(let* ([nums '()]
+       [f1 (future (λ () 
+                     (build-rand-list nums 10)))]) 
+  (set! nums (touch f1)) 
+  (test 20 length (touch (future (λ () 
+                           (build-rand-list nums 10))))))
+
+(let* ([f1 (future (λ () 
+                     (build-rand-list '() 20)))] 
+       [f2 (future (λ () (length (touch f1))))]) 
+  (test 20 touch f2))
+
+(test 50000 'test7
+      (let ([fts (for/list ([i (in-range 0 10000)]) 
+                   (future (λ () (build-rand-list '() 5))))]) 
+        (length (append-list-of-lists '() (map touch fts)))))
+
+(test 31 'test8 
+      (let* ([f1 (future (λ () (foldl + 0 '(1 2 3 4 5))))] 
+             [f2 (future (λ () (+ (touch 
+                                   (future (λ () 
+                                             (+ 6 
+                                                (touch f1))))) 
+                                  10)))]) 
+        (touch f2)))
+
+(test 30000 'test9
+      (let ([fts (for/list ([i (in-range 0 100)]) 
+                   (future (λ () 
+                             (build-rand-list '() 300))))]) 
+        (collect-garbage) 
+        (collect-garbage) 
+        (length (append-list-of-lists '() (map touch fts)))))
+
+(define (sum-to acc limit) 
+  (case limit 
+    [(0) acc] 
+    [else 
+     (sum-to (+ acc limit) (- limit 1))]))
+
+(test 600030000 'test10 
+ (let ([f1 (future (λ () (sum-to 0 20000)))] 
+       [f2 (future (λ () (sum-to 0 20000)))] 
+       [f3 (future (λ () (sum-to 0 20000)))]) 
+   (+ (+ (touch f3) (touch f1)) (touch f2))))
+
+(test #t 'test11 
+  (let* ( [f1 (future (λ () (build-rand-list '() 10000)))]
+          [f2 (future (λ () 
+                          (foldl (λ (a b) 
+                                    (* a b)) 
+                                  1 
+                                  (touch f1))))] 
+          [f3 (future (λ () (< (touch f2) 1)))]) 
+    (touch f3)))
+                          
+
+(report-errs)
+
+
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+