Added a test for random.choice behavior.

src/fix.py

@@ -49,7 +49,7 @@ string.ascii = string.maketrans('', '')
 import random
 _choice = random.choice
 def choice(iterable):
-    if isinstance(iterable, list):
+    if isinstance(iterable, (list, tuple)):
         return _choice(iterable)
     else:
         n = 1

test/test_fix.py

@@ -31,9 +31,13 @@
 
 from testsupport import *
 
+import random
 import itertools
 
 class FunctionsTest(SupyTestCase):
+    def testRandomChoice(self):
+        self.assertRaises(IndexError, random.choice, {})
+        
     def testReversed(self):
         L = range(10)
         revL = list(reversed(L))