Apply expected patch format when updating tags in v2.images

Currently, glanceclient.v2.update builds a patch request that does not
match glance API.

This patch overrides the default behaviour to customize the patch
request with the right format for the API.

Co-Authored-By: Steve Lewis <steve.lewis@rackspace.com>
Fixes bug 1306774
Change-Id: If0739ac285da1e741bfa40b6c719331a5ce49319

tests/v2/test_images.py

@@ -58,7 +58,7 @@ data_fixtures = {
                     },
                     'color': {'type': 'string', 'is_base': False},
                 },
-                'additionalProperties': {'type': 'string'}
+                'additionalProperties': {'type': 'string'},
             },
         ),
     },
@@ -418,8 +418,9 @@ schema_fixtures = {
                         }
                     },
                     'color': {'type': 'string', 'is_base': False},
+                    'tags': {'type': 'array'},
                 },
-                'additionalProperties': {'type': 'string'}
+                'additionalProperties': {'type': 'string'},
             }
         )
     }
@@ -889,6 +890,22 @@ class TestController(testtools.TestCase):
             self._empty_get(image_id)
         ])
 
+    def test_update_tags(self):
+        image_id = 'a2b83adc-888e-11e3-8872-78acc0b951d8'
+        tag_map = {'tags': ['tag01', 'tag02', 'tag03']}
+
+        image = self.controller.update(image_id, **tag_map)
+
+        expected_body = [{'path': '/tags', 'op': 'replace',
+                          'value': tag_map['tags']}]
+        expected = [
+            self._empty_get(image_id),
+            self._patch_req(image_id, expected_body),
+            self._empty_get(image_id)
+        ]
+        self.assertEqual(expected, self.api.calls)
+        self.assertEqual(image_id, image.id)
+
     def test_update_missing_location(self):
         image_id = 'a2b83adc-888e-11e3-8872-78acc0b951d8'
         new_loc = {'url': 'http://spam.com/', 'metadata': {'spam': 'ham'}}

tests/v2/test_schemas.py

@@ -37,8 +37,11 @@ fixtures = {
             {
                 'name': 'image',
                 'properties': {
-                    'name': {'type': 'string', 'description': 'Name of image'},
+                    'name': {'type': 'string',
+                             'description': 'Name of image'},
+                    'tags': {'type': 'array'}
                 },
+
             },
         ),
     },
@@ -51,6 +54,7 @@ _SCHEMA = schemas.Schema({
         'name': {'type': 'string'},
         'color': {'type': 'string'},
         'shape': {'type': 'string', 'is_base': False},
+        'tags': {'type': 'array'}
     },
 })
 
@@ -99,7 +103,8 @@ class TestController(testtools.TestCase):
     def test_get_schema(self):
         schema = self.controller.get('image')
         self.assertEqual('image', schema.name)
-        self.assertEqual(['name'], [p.name for p in schema.properties])
+        self.assertEqual(['name', 'tags'],
+                         [p.name for p in schema.properties])
 
 
 class TestSchemaBasedModel(testtools.TestCase):
@@ -195,3 +200,14 @@ class TestSchemaBasedModel(testtools.TestCase):
         patch = original.patch
         expected = '[{"path": "/shape", "value": "square", "op": "replace"}]'
         self.assertTrue(compare_json_patches(patch, expected))
+
+    def test_patch_should_replace_tags(self):
+        obj = {'name': 'fred', }
+
+        original = self.model(obj)
+        original['tags'] = ['tag1', 'tag2']
+
+        patch = original.patch
+        expected = '[{"path": "/tags", "value": ["tag1", "tag2"], ' \
+            '"op": "replace"}]'
+        self.assertTrue(compare_json_patches(patch, expected))