--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_marking1/drumb_test3.scala	Fri Jan 22 10:37:55 2021 +0000
@@ -0,0 +1,17 @@
+/*def myassert(cond : => Boolean) = {
+  try {
+    assert(cond)
+  } catch { 
+    case _ : Throwable => System.exit(1)
+  }
+}
+*/
+assert(CW6b.get_prices(List("BIDU"), 2004 to 2008) ==
+   List(List(None), List(None), List(Some(6.35)), 
+        List(Some(12.241)), List(Some(38.188))))
+
+
+assert(CW6b.get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
+   List(List(Some(312.204773), Some(26.782711)), 
+        List(Some(301.0466), Some(41.244694)), 
+        List(Some(331.462585), Some(51.464207))))