diff -r 663c2a9108d1 -r 4de31fdc0d67 main_testing1/drumb_test7.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_testing1/drumb_test7.scala	Mon Nov 02 02:31:44 2020 +0000
@@ -0,0 +1,24 @@
+/*
+def myassert(cond : => Boolean) = {
+  try {
+    assert(cond)
+  } catch { 
+    case _ : Throwable => System.exit(1)
+  }
+}
+*/
+
+assert(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2000, 100) == 100)
+assert(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2001, 100) == 27)
+assert(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2002, 100) == 42)
+assert(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2003, 100) == 27)
+assert(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2004, 100) == 38)
+
+// 113
+assert((112 to 114).contains(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2005, 100)))
+// 254
+assert((252 to 256).contains(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2006, 100)))
+// 349
+assert((346 to 352).contains(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 2000 to 2007, 100)))
+//11504
+assert((11389 to 11619).contains(CW6b.investment(List("GOOG", "AAPL", "BIDU"), 1990 to 2017, 100)))