1 files changed, 35 insertions, 0 deletions
diff --git a/tests/srfi-41-util.scm b/tests/srfi-41-util.scm
new file mode 100644
index 00000000..61bce71e
--- /dev/null
+++ b/tests/srfi-41-util.scm
@@ -0,0 +1,35 @@
+(((srfi srfi-41 util) stream-paginate)
+ ((srfi srfi-41) stream->list stream-ref stream-from
+  stream-filter stream-car stream)
+ ((ice-9 sandbox) call-with-time-limit)
+ )
+
+(test-equal "Finite stream"
+  '((0 1 2) (3 4 5) (6 7 8) (9))
+  (let ((strm
+         (stream-paginate (stream 0 1 2 3 4 5 6 7 8 9)
+                          3)))
+    (map stream->list (stream->list strm))))
+
+
+(test-equal "slice of infinite"
+    '(1000 1001 1002 1003 1004 1005 1006 1007 1008 1009)
+  (let ((strm (stream-paginate (stream-from 0))))
+    (stream->list (stream-ref strm 100))))
+
+
+
+(define unique-symbol (gensym))
+
+(test-equal "time out on infinite 'empty' stream"
+  unique-symbol
+  ;; defined outside time limit since creation should always
+  ;; succeed. Only reference is expected to fail.
+  (let ((strm (stream-paginate
+               ;; easy way to get stream which never finds
+               ;; any elements.
+               (stream-filter negative? (stream-from 0)))))
+    (call-with-time-limit
+     0.1
+     (lambda () (stream-car strm))
+     (lambda _ unique-symbol))))