unit tests and fix

2 files changed, 21 insertions, 2 deletions

diff --git a/nova/api/ec2/apirequest.py b/nova/api/ec2/apirequest.py
index 4b3b93124..3c8651582 100644
--- a/nova/api/ec2/apirequest.py
+++ b/nova/api/ec2/apirequest.py
@@ -52,9 +52,11 @@ def _try_convert(value):
         return True
     if value == 'False':
         return False
-    if value == '0':
-        return 0
     valueneg = value[1:] if value[0] == '-' else value
+    if valueneg == '0':
+        return 0
+    if valueneg == '':
+        return value
     if valueneg[0] == '0':
         if valueneg[1] in 'xX':
             return int(value,16)
diff --git a/nova/tests/api_unittest.py b/nova/tests/api_unittest.py
index 7ab27e000..e82acb6ff 100644
--- a/nova/tests/api_unittest.py
+++ b/nova/tests/api_unittest.py
@@ -29,6 +29,7 @@ from nova import flags
 from nova import test
 from nova import api
 from nova.api.ec2 import cloud
+from nova.api.ec2 import apirequest
 from nova.auth import manager
 
 
@@ -81,6 +82,22 @@ class FakeHttplibConnection(object):
         pass
 
 
+class XmlConversionTestCase(test.BaseTestCase):
+    """Unit test api xml conversion"""
+    def test_number_conversion(self):
+        conv = apirequest._try_convert
+        self.assertEqual(conv('None'), None)
+        self.assertEqual(conv('True'), True)
+        self.assertEqual(conv('False'), False)
+        self.assertEqual(conv('0'), 0)
+        self.assertEqual(conv('42'), 42)
+        self.assertEqual(conv('3.14'), 3.14)
+        self.assertEqual(conv('-57.12'), -57.12)
+        self.assertEqual(conv('0x57'), 0x57)
+        self.assertEqual(conv('-0x57'), -0x57)
+        self.assertEqual(conv('-'), '-')
+        self.assertEqual(conv('-0'), 0)
+
 class ApiEc2TestCase(test.BaseTestCase):
     """Unit test for the cloud controller on an EC2 API"""
     def setUp(self): # pylint: disable-msg=C0103,C0111