X-Git-Url: https://git.xandkar.net/?a=blobdiff_plain;f=tt.rkt;h=b691fd0669da6ed0504868939722cea1eb88e064;hb=dad4504d0e1c23bcd1de18eaa5d6615a228f9658;hp=b11364f4aaf3d16b9b5db273dfdb803fd435a598;hpb=24c6a76b401882f7c263d07efdf73109fa483128;p=tt.git

diff --git a/tt.rkt b/tt.rkt
index b11364f..b691fd0 100644
--- a/tt.rkt
+++ b/tt.rkt
@@ -43,10 +43,14 @@
 (require http-client)
 (require rfc3339-old)
 
+(module+ test
+  (require rackunit))
+
 (struct msg  (ts_epoch ts_rfc3339 nick uri text))
 (struct feed (nick uri))
 
 (define (concurrent-filter-map num_workers f xs)
+  ; TODO preserve order of elements OR communicate that reorder is expected
   ; TODO switch from mailboxes to channels
   (define (make-worker id f)
     (define parent (current-thread))
@@ -80,6 +84,15 @@
   (for-each thread-wait threads)
   results)
 
+(module+ test
+  (define n-workers 10)
+  (define given (list
+                  (λ (x) (if (even? x) x #f))
+                  (range 11)))
+  (check-equal?
+    (sort (apply concurrent-filter-map (cons n-workers given)) <)
+    (sort (apply            filter-map                 given ) <)))
+
 (define (msg-print out-format odd msg)
   (printf
     (match out-format