--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core_testing1/collatz_test1.scala	Sat Nov 06 00:06:39 2021 +0000
@@ -0,0 +1,8 @@
+
+import C1._
+
+assert(collatz(1) == 0) 
+assert(collatz(6) == 8)
+assert(collatz(9) == 19)
+
+