Fix #132: enforce 64-bit ranges on long values for protobuf attrs.

gcloud/datastore/helpers.py

@@ -2,11 +2,15 @@
 import calendar
 from datetime import datetime, timedelta
 
+from google.protobuf.internal.type_checkers import Int64ValueChecker
 import pytz
 
 from gcloud.datastore.key import Key
 
 
+INT64 = Int64ValueChecker().CheckValue
+
+
 def get_protobuf_attribute_and_value(val):
   """Given a value, return the protobuf attribute name and proper value.
 
@@ -53,7 +57,7 @@ def get_protobuf_attribute_and_value(val):
   elif isinstance(val, float):
     name, value = 'double', val
   elif isinstance(val, (int, long)):
-    name, value = 'integer', val
+    name, value = 'integer', INT64(val)
   elif isinstance(val, basestring):
     name, value = 'string', val
 

gcloud/datastore/test_helpers.py

@@ -56,11 +56,19 @@ def test_int(self):
         self.assertEqual(value, 42)
 
     def test_long(self):
-        must_be_long = 1 << 63
+        must_be_long = (1 << 63) - 1
         name, value = self._callFUT(must_be_long)
         self.assertEqual(name, 'integer_value')
         self.assertEqual(value, must_be_long)
 
+    def test_long_too_small(self):
+        too_small = -(1 << 63) - 1
+        self.assertRaises(ValueError, self._callFUT, too_small)
+
+    def test_long_too_large(self):
+        too_large = 1 << 63
+        self.assertRaises(ValueError, self._callFUT, too_large)
+
     def test_native_str(self):
         name, value = self._callFUT('str')
         self.assertEqual(name, 'string_value')