--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_marking2/danube_test7a.scala	Mon Jan 25 00:21:00 2021 +0000
@@ -0,0 +1,13 @@
+
+import CW7b._
+
+val urban_recs = 
+  Map("1" -> List("b", "a"), 
+      "2" -> List("y", "x"), 
+      "3" -> List("a", "c"))
+
+val urban_names = Map("a" -> "A", "b" -> "B", "c" -> "C", "x" -> "X", "y" -> "Y")
+
+assert(most_recommended(urban_recs, urban_names).toSet ==
+        Set(("A",2), ("B",1), ("C",1), ("X",1), ("Y",1)))
+