Add tests for multiattach check in cinder.objects

There doesn't exists a test for multiattach check in the
cinder.tests.unit.objects.test_volume_types.TestVolumeType class.
This patch adds the respective tests.

Change-Id: Ic6c19414738367aa794522aaa0c1a963abcac723

cinder/objects/volume.py

@@ -567,6 +567,9 @@ class Volume(cleanable.CinderCleanableObject, base.CinderObject,
     def is_replicated(self):
         return self.volume_type and self.volume_type.is_replicated()
 
+    def is_multiattach(self):
+        return self.volume_type and self.volume_type.is_multiattach()
+
 
 @base.CinderObjectRegistry.register
 class VolumeList(base.ObjectListBase, base.CinderObject):

cinder/objects/volume_type.py

@@ -165,6 +165,9 @@ class VolumeType(base.CinderPersistentObject, base.CinderObject,
     def is_replicated(self):
         return utils.is_replicated_spec(self.extra_specs)
 
+    def is_multiattach(self):
+        return utils.is_multiattach_spec(self.extra_specs)
+
 
 @base.CinderObjectRegistry.register
 class VolumeTypeList(base.ObjectListBase, base.CinderObject):

cinder/tests/unit/objects/test_volume_type.py

@@ -227,6 +227,18 @@ class TestVolumeType(test_objects.BaseObjectsTestCase):
             self.context, extra_specs={'replication_enabled': not_enabled})
         self.assertFalse(volume_type.is_replicated())
 
+    @ddt.data('<is> False', '<is> false', '<is> f')
+    def test_is_multiattach_specs_false(self, false):
+        volume_type = fake_volume.fake_volume_type_obj(
+            self.context, extra_specs={'multiattach': false})
+        self.assertFalse(volume_type.is_multiattach())
+
+    @ddt.data('<is> True', '<is>   True')
+    def test_is_multiattach_specs_true(self, true):
+        volume_type = fake_volume.fake_volume_type_obj(
+            self.context, extra_specs={'multiattach': true})
+        self.assertTrue(volume_type.is_multiattach())
+
 
 class TestVolumeTypeList(test_objects.BaseObjectsTestCase):
     @mock.patch('cinder.volume.volume_types.get_all_types')

cinder/volume/utils.py

@@ -966,6 +966,11 @@ def is_replicated_spec(extra_specs):
             is_replicated_str(extra_specs.get('replication_enabled')))
 
 
+def is_multiattach_spec(extra_specs):
+    return (extra_specs and
+            is_replicated_str(extra_specs.get('multiattach')))
+
+
 def group_get_by_id(group_id):
     ctxt = context.get_admin_context()
     group = db.group_get(ctxt, group_id)