Update volume type details

Test for verifies updating volume type name, description
and 'is_public' status
Added: Api for update volume type

Change-Id: Id99716762b6a64f958d09eda5ce3fe79a2e0e0a0
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 01f96b7..7b4379b 100755
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -162,6 +162,28 @@
                 encryption_type['volume_type_id']))
         self.assertEmpty(deleted_encryption_type)
 
+    @test.idempotent_id('cf9f07c6-db9e-4462-a243-5933ad65e9c8')
+    def test_volume_type_update(self):
+        # Create volume type
+        volume_type = self.create_volume_type()
+
+        # New volume type details
+        name = data_utils.rand_name("volume-type")
+        description = data_utils.rand_name("volume-type-description")
+        is_public = not volume_type['is_public']
+
+        # Update volume type details
+        kwargs = {'name': name,
+                  'description': description,
+                  'is_public': is_public}
+        updated_vol_type = self.admin_volume_types_client.update_volume_type(
+            volume_type['id'], **kwargs)['volume_type']
+
+        # Verify volume type details were updated
+        self.assertEqual(name, updated_vol_type['name'])
+        self.assertEqual(description, updated_vol_type['description'])
+        self.assertEqual(is_public, updated_vol_type['is_public'])
+
 
 class VolumeTypesV1Test(VolumeTypesV2Test):
     _api_version = 1
diff --git a/tempest/services/volume/base/admin/base_types_client.py b/tempest/services/volume/base/admin/base_types_client.py
index 0b0e061..2effaae 100755
--- a/tempest/services/volume/base/admin/base_types_client.py
+++ b/tempest/services/volume/base/admin/base_types_client.py
@@ -140,6 +140,18 @@
         self.expected_success(202, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def update_volume_type(self, volume_type_id, **kwargs):
+        """Updates volume type name, description, and/or is_public.
+
+        Available params: see http://developer.openstack.org/
+        api-ref-blockstorage-v2.html#updateVolumeType
+        """
+        put_body = json.dumps({'volume_type': kwargs})
+        resp, body = self.put('types/%s' % volume_type_id, put_body)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def update_volume_type_extra_specs(self, volume_type_id, extra_spec_name,
                                        extra_specs):
         """Update a volume_type extra spec.