Replace assertEqual([], items) with assertEmpty(items)

This patch is to replace assertEqual([], items) with assertEmpty(items),
which the items is a empty list.

Change-Id: Ibdd1e141740497b819e08ac8abeb74740b8a6cf9

tempest/api/compute/admin/test_servers.py

@@ -65,7 +65,7 @@ class ServersAdminTestJSON(base.BaseV2ComputeAdminTest):
         params = {'status': 'invalid_status'}
         body = self.client.list_servers(detail=True, **params)
         servers = body['servers']
-        self.assertEqual([], servers)
+        self.assertEmpty(servers)
 
     @decorators.idempotent_id('51717b38-bdc1-458b-b636-1cf82d99f62f')
     def test_list_servers_by_admin(self):

tempest/api/compute/servers/test_list_servers_negative.py

@@ -50,7 +50,7 @@ class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
         servers = body['servers']
         actual = [srv for srv in servers
                   if srv['id'] == self.deleted_id]
-        self.assertEqual([], actual)
+        self.assertEmpty(actual)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ff01387d-c7ad-47b4-ae9e-64fa214638fe')
@@ -58,7 +58,7 @@ class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
         # Listing servers for a non existing image returns empty list
         body = self.client.list_servers(image='non_existing_image')
         servers = body['servers']
-        self.assertEqual([], servers)
+        self.assertEmpty(servers)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('5913660b-223b-44d4-a651-a0fbfd44ca75')
@@ -66,7 +66,7 @@ class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
         # Listing servers by non existing flavor returns empty list
         body = self.client.list_servers(flavor='non_existing_flavor')
         servers = body['servers']
-        self.assertEqual([], servers)
+        self.assertEmpty(servers)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('e2c77c4a-000a-4af3-a0bd-629a328bde7c')
@@ -74,7 +74,7 @@ class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
         # Listing servers for a non existent server name returns empty list
         body = self.client.list_servers(name='non_existing_server_name')
         servers = body['servers']
-        self.assertEqual([], servers)
+        self.assertEmpty(servers)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('fcdf192d-0f74-4d89-911f-1ec002b822c4')
@@ -82,7 +82,7 @@ class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
         # Return an empty list when invalid status is specified
         body = self.client.list_servers(status='non_existing_status')
         servers = body['servers']
-        self.assertEqual([], servers)
+        self.assertEmpty(servers)
 
     @decorators.idempotent_id('12c80a9f-2dec-480e-882b-98ba15757659')
     def test_list_servers_by_limits(self):
@@ -138,4 +138,4 @@ class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
         servers = body['servers']
         actual = [srv for srv in servers
                   if srv['id'] == self.deleted_id]
-        self.assertEqual([], actual)
+        self.assertEmpty(actual)

tempest/api/identity/admin/v3/test_groups.py

@@ -134,4 +134,4 @@ class GroupsV3TestJSON(base.BaseIdentityV3AdminTest):
         for g in body:
             fetched_ids.append(g['id'])
         missing_groups = [g for g in group_ids if g not in fetched_ids]
-        self.assertEqual([], missing_groups)
+        self.assertEmpty(missing_groups)

tempest/api/image/v2/test_images_metadefs_namespace_tags.py

@@ -58,7 +58,7 @@ class MetadataNamespaceTagsTest(base.BaseV2ImageTest):
             namespace['namespace'])
         body = self.namespace_tags_client.list_namespace_tags(
             namespace['namespace'])
-        self.assertEqual([], body['tags'])
+        self.assertEmpty(body['tags'])
 
     @decorators.idempotent_id('a2a3765e-1a2c-3f6d-a3a7-3cc3466ab875')
     def test_create_update_delete_tag(self):

tempest/api/volume/test_volumes_list.py

@@ -343,7 +343,7 @@ class VolumesListTestJSON(base.BaseVolumeTest):
 
             # If cannot follow make sure it's because we have finished
             else:
-                self.assertEqual([], remaining or [],
+                self.assertEmpty(remaining or [],
                                  'No more pages reported, but still '
                                  'missing ids %s' % remaining)
                 break