updated scrapy.utils.misc.hash_values to drop usage of deprecated sha module in favor or hashlib, added tests to hash_values function

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%40378

scrapy/trunk/scrapy/tests/test_utils_misc.py

@@ -0,0 +1,14 @@
+import unittest
+
+from scrapy.utils.misc import hash_values
+from scrapy.core.exceptions import UsageError
+
+class UtilsMiscTestCase(unittest.TestCase):
+    def test_hash_values(self):
+        self.assertEqual(hash_values('some', 'values', 'to', 'hash'),
+                         'f37f5dc65beaaea35af05e16e26d439fd150c576')
+
+        self.assertRaises(UsageError, hash_values, 'some', None, 'value')
+
+if __name__ == "__main__":
+    unittest.main()

scrapy/trunk/scrapy/utils/misc.py

@@ -2,7 +2,7 @@
 Auxiliary functions which doesn't fit anywhere else
 """
 import re
-import sha
+import hashlib
 
 from twisted.internet import defer
 
@@ -104,7 +104,7 @@ def hash_values(*values):
     >>> hash_values('some', 'values', 'to', 'hash')
     'f37f5dc65beaaea35af05e16e26d439fd150c576'
     """
-    hash = sha.new()
+    hash = hashlib.sha1()
     for value in values:
         if value is None:
             message = "hash_values was passed None at argument index %d. This is a bug in the calling code" \