tests/basics: Add further tests for OrderedDict.

tests/basics/ordereddict1.py

@@ -9,8 +9,19 @@ except ImportError:
         sys.exit()
 
 d = OrderedDict([(10, 20), ("b", 100), (1, 2)])
+print(len(d))
 print(list(d.keys()))
 print(list(d.values()))
 del d["b"]
+print(len(d))
+print(list(d.keys()))
+print(list(d.values()))
+
+# access remaining elements after deleting
+print(d[10], d[1])
+
+# add an element after deleting
+d["abc"] = 123
+print(len(d))
 print(list(d.keys()))
 print(list(d.values()))