Fix test cases still use v3 prefix

After commit e03cfed720
the prefix of v3 API was changed to os_compute_api
so prefix in test cases should be changed as well.
This patch changed test_cells, test_extended_volumes,
test_simple_tenant_usage and test_used_limits.

Partially implements bp v3-api-policy

Change-Id: I793f6bbb35ab868d05224e4076befe981b19d537

nova/tests/unit/api/openstack/compute/contrib/test_cells.py

@@ -88,7 +88,7 @@ class BaseCellsTest(test.NoDBTestCase):
 
 
 class CellsTestV21(BaseCellsTest):
-    cell_extension = 'compute_extension:v3:os-cells'
+    cell_extension = 'os_compute_api:os-cells'
     bad_request = exception.ValidationError
 
     def _get_cell_controller(self, ext_mgr):

nova/tests/unit/api/openstack/compute/contrib/test_extended_volumes.py

@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import mock
 from oslo_serialization import jsonutils
 import webob
 
@@ -150,14 +151,20 @@ class ExtendedVolumesEnforcementV21(test.NoDBTestCase):
         self.controller = extended_volumes_v21.ExtendedVolumesController()
         self.req = fakes.HTTPRequest.blank('')
 
-    def test_extend_show_policy_failed(self):
-        rule_name = 'compute_extension:v3:os-extended-volumes'
+    @mock.patch.object(extended_volumes_v21.ExtendedVolumesController,
+                       '_extend_server')
+    def test_extend_show_policy_failed(self, mock_extend):
+        rule_name = 'os_compute_api:os-extended-volumes'
         self.policy.set_rules({rule_name: "project:non_fake"})
         # Pass ResponseObj as None, the code shouldn't touch the None.
         self.controller.show(self.req, None, fakes.FAKE_UUID)
+        self.assertFalse(mock_extend.called)
 
-    def test_extend_detail_policy_failed(self):
-        rule_name = 'compute_extension:v3:os-extended-volumes'
+    @mock.patch.object(extended_volumes_v21.ExtendedVolumesController,
+                   '_extend_server')
+    def test_extend_detail_policy_failed(self, mock_extend):
+        rule_name = 'os_compute_api:os-extended-volumes'
         self.policy.set_rules({rule_name: "project:non_fake"})
         # Pass ResponseObj as None, the code shouldn't touch the None.
         self.controller.detail(self.req, None)
+        self.assertFalse(mock_extend.called)

nova/tests/unit/api/openstack/compute/contrib/test_simple_tenant_usage.py

@@ -104,7 +104,7 @@ def fake_instance_get_active_by_window_joined(context, begin, end,
 @mock.patch.object(db, 'instance_get_active_by_window_joined',
                    fake_instance_get_active_by_window_joined)
 class SimpleTenantUsageTestV21(test.TestCase):
-    policy_rule_prefix = "compute_extension:v3:os-simple-tenant-usage"
+    policy_rule_prefix = "os_compute_api:os-simple-tenant-usage"
     controller = simple_tenant_usage_v21.SimpleTenantUsageController()
 
     def setUp(self):

nova/tests/unit/api/openstack/compute/contrib/test_used_limits.py

@@ -32,7 +32,7 @@ class FakeRequest(object):
 
 
 class UsedLimitsTestCaseV21(test.NoDBTestCase):
-    used_limit_extension = "compute_extension:v3:os-used-limits:used_limits"
+    used_limit_extension = "os_compute_api:os-used-limits"
     include_server_group_quotas = True
 
     def setUp(self):