diff -r c989f50da5de -r e461b5325b5e testing5/bf_test2.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing5/bf_test2.scala	Thu Dec 06 21:49:43 2018 +0000
@@ -0,0 +1,5 @@
+
+assert(sread(Map(), 2) == 0)
+assert(sread(Map(2 -> 1), 2) == 1)
+assert(write(Map(), 1, 2) == Map(1 -> 2))
+assert(write(Map(1 -> 0), 1, 2) == Map(1 -> 2))