Make sure we handle longs.

Unforutnaly, MongoDB has a 64-bit limit. Sigh. We can later add a custom
serializer if we really have to.

src/mongopersist/interfaces.py

@@ -23,7 +23,7 @@
 from bson import objectid, dbref
 
 MONGO_NATIVE_TYPES = (
-    bool, int, float, unicode, datetime.datetime, types.NoneType,
+    bool, int, long, float, unicode, datetime.datetime, types.NoneType,
     objectid.ObjectId, dbref.DBRef)
 REFERENCE_SAFE_TYPES = (
     datetime.date, datetime.time, decimal.Decimal)

src/mongopersist/tests/test_datamanager.py

@@ -1290,6 +1290,36 @@ def doctest_MongoDataManager_no_compare():
     """
 
 
+def doctest_MongoDataManager_long():
+    r"""MongoDataManager: Test behavior of long integers.
+
+      >>> dm.root['app'] = Root()
+      >>> dm.root['app'].x = 1L
+      >>> dm.tpc_finish(None)
+
+    Let's see how it is deserialzied?
+
+      >>> dm.root['app'].x
+      1L
+
+    Let's now create a really long integer:
+
+      >>> dm.root['app'].x = 2**62
+      >>> dm.tpc_finish(None)
+
+      >>> dm.root['app'].x
+      4611686018427387904L
+
+    And now an overly long one.
+
+      >>> dm.root['app'].x = 12345678901234567890L
+      >>> dm.tpc_finish(None)
+      Traceback (most recent call last):
+      ...
+      OverflowError: MongoDB can only handle up to 8-byte ints
+    """
+
+
 def doctest_process_spec():
     r"""process_spec(): General test
 

src/mongopersist/tests/test_serialize.py

@@ -313,6 +313,8 @@ def doctest_ObjectWriter_get_state_MONGO_NATIVE_TYPES():
       >>> writer = serialize.ObjectWriter(None)
       >>> writer.get_state(1)
       1
+      >>> writer.get_state(1L)
+      1L
       >>> writer.get_state(1.0)
       1.0
       >>> writer.get_state(u'Test')