fix flavor.swap attribute type

swap attribute of flavor is expected to be int. It is already checked as
int in compute unittests, but not once returned as a fake.

Change-Id: I4da810cd9828374cebb2a120cce6a8d55f182ea9

openstack/compute/v2/flavor.py

@@ -57,7 +57,7 @@ class Flavor(resource.Resource):
     #: The number of virtual CPUs this flavor offers. *Type: int*
     vcpus = resource.Body('vcpus', type=int, default=0)
     #: Size of the swap partitions.
-    swap = resource.Body('swap', default=0)
+    swap = resource.Body('swap', type=int, default=0)
     #: Size of the ephemeral data disk attached to this server. *Type: int*
     ephemeral = resource.Body('OS-FLV-EXT-DATA:ephemeral', type=int, default=0)
     #: ``True`` if this flavor is disabled, ``False`` if not. *Type: bool*

openstack/resource.py

@@ -83,7 +83,14 @@ def _convert_type(value, data_type, list_type=None):
         # and the AbsoluteLimits type for an example.
         if isinstance(value, dict):
             return data_type(**value)
-        return data_type(value)
+        try:
+            return data_type(value)
+        except ValueError:
+            # If we can not convert data to the expected type return empty
+            # instance of the expected type.
+            # This is necessary to handle issues like with flavor.swap where
+            # empty string means "0".
+            return data_type()
 
 
 class _BaseComponent:

openstack/tests/fakes.py

@@ -70,7 +70,7 @@ def make_fake_flavor(flavor_id, name, ram=100, disk=1600, vcpus=24):
         u'os-flavor-access:is_public': True,
         u'ram': ram,
         u'rxtx_factor': 1.0,
-        u'swap': u'',
+        u'swap': 0,
         u'vcpus': vcpus,
     }
 

openstack/tests/unit/cloud/test_caching.py

@@ -26,6 +26,7 @@ from openstack.identity.v3 import project as _project
 from openstack.identity.v3 import user as _user
 from openstack.image.v2 import image as _image
 from openstack.network.v2 import port as _port
+from openstack.test import fakes as _fakes
 from openstack.tests import fakes
 from openstack.tests.unit import base
 from openstack.tests.unit.cloud import test_port
@@ -539,6 +540,7 @@ class TestMemoryCache(base.TestCase):
         mock_uri = '{endpoint}/flavors/detail?is_public=None'.format(
             endpoint=fakes.COMPUTE_ENDPOINT
         )
+        flavors = list(_fakes.generate_fake_resources(_flavor.Flavor, count=2))
 
         uris_to_mock = [
             dict(
@@ -555,7 +557,7 @@ class TestMemoryCache(base.TestCase):
                 validate=dict(
                     headers={'OpenStack-API-Version': 'compute 2.53'}
                 ),
-                json={'flavors': fakes.FAKE_FLAVOR_LIST},
+                json={'flavors': flavors},
             ),
         ]
         self.use_compute_discovery()
@@ -568,7 +570,7 @@ class TestMemoryCache(base.TestCase):
 
         self.cloud.list_flavors.invalidate(self.cloud)
         self.assertResourceListEqual(
-            self.cloud.list_flavors(), fakes.FAKE_FLAVOR_LIST, _flavor.Flavor
+            self.cloud.list_flavors(), flavors, _flavor.Flavor
         )
 
         self.assert_calls()

openstack/tests/unit/compute/v2/test_flavor.py

@@ -91,6 +91,12 @@ class TestFlavor(base.TestCase):
         )
         self.assertEqual(BASIC_EXAMPLE['rxtx_factor'], sot.rxtx_factor)
 
+    def test_make_basic_swap(self):
+        sot = flavor.Flavor(id=IDENTIFIER, swap="")
+        self.assertEqual(0, sot.swap)
+        sot1 = flavor.Flavor(id=IDENTIFIER, swap=0)
+        self.assertEqual(0, sot1.swap)
+
     def test_make_defaults(self):
         sot = flavor.Flavor(**DEFAULTS_EXAMPLE)
         self.assertEqual(DEFAULTS_EXAMPLE['original_name'], sot.name)