diff -r a9d84442fb65 -r ec7a12806c3f marking5/bf_test4.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/marking5/bf_test4.scala	Wed Jan 16 12:20:34 2019 +0000
@@ -0,0 +1,12 @@
+
+assert(run("[-]", Map(0 -> 100)) == Map(0 -> 0))
+assert(run("[->+<]", Map(0 -> 10)) == Map(0 -> 0, 1 -> 10))
+assert(run("[>>+>>+<<<<-]", Map(0 -> 42)) == Map(0 -> 0, 2 -> 42, 4 -> 42))
+val hw_urban = """+++++[->++++++++++<]>--<+++[->>++++++++++
+                  <<]>>++<<----------[+>.>.<+<]"""
+assert(run(hw_urban) == Map(0 -> 0, 1 -> 58, 2 -> 32))
+
+val hw_urban1 = """++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.
+                   +++++++..+++.>>.<-.<.+++.------.--------.>>+.>++."""
+
+assert(run(hw_urban1) == Map(0 -> 0, 5 -> 33, 1 -> 0, 6 -> 10, 2 -> 72, 3 -> 100, 4 -> 87))