--- a/marking1/drumb_test3.scala	Wed Jul 24 15:18:44 2019 +0100
+++ b/marking1/drumb_test3.scala	Thu Aug 01 09:48:34 2019 +0100
@@ -1,4 +1,17 @@
-assert(get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
-    List(List(Some(311.349976), Some(20.544939)), 
-         List(Some(300.222351), Some(31.638695)), 
-         List(Some(330.555054), Some(39.478039))))
+def myassert(cond : => Boolean) = {
+  try {
+    assert(cond)
+  } catch { 
+    case _ : Throwable => System.exit(1)
+  }
+}
+
+myassert(get_prices(List("BIDU"), 2004 to 2008) ==
+   List(List(None), List(None), List(Some(6.35)), 
+        List(Some(12.241)), List(Some(38.188))))
+
+
+myassert(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))))