[GSoC2024] - add/rest-api-tests-for-attribute-rename (#7754)

Added rest-api tests for attribute rename feature.

These rest-api tests are to validate the changes introduced in the PR
[here](#7670)

---------

Co-authored-by: Maria Khrustaleva <maria@cvat.ai>

tests/python/rest_api/test_labels.py

@@ -593,12 +593,25 @@ def _get_patch_data(
         if overrides:
             payload = deepcopy(overrides)
 
-            if overrides.get("attributes"):
-                payload["attributes"] = (original_data.get("attributes") or []) + overrides[
-                    "attributes"
-                ]
-                result["attributes"] = deepcopy(payload["attributes"])
-                ignore_fields.append("attributes.id")
+            if overridden_attributes := deepcopy(overrides.get("attributes", [])):
+                combined_attributes = deepcopy(original_data.get("attributes", []))
+
+                mapping = {attr["id"]: attr for attr in overridden_attributes if "id" in attr}
+
+                # no attributes to update
+                if not mapping:
+                    ignore_fields.append("attributes.id")
+
+                for attr in combined_attributes:
+                    if attr["id"] in mapping:
+                        attr.update(mapping[attr["id"]])
+
+                for attr in overridden_attributes:
+                    if attr not in combined_attributes:
+                        combined_attributes.append(attr)
+
+                payload["attributes"] = deepcopy(combined_attributes)
+                result["attributes"] = deepcopy(combined_attributes)
 
             # Changing skeletons is not supported
             if overrides.get("type") == "skeleton":
@@ -663,6 +676,34 @@ def test_can_patch_label_field(self, source, admin_user, param, newvalue):
             user, label["id"], patch_data, expected_data=expected_data, ignore_fields=ignore_fields
         )
 
+    @parametrize("source", _TestLabelsPermissionsBase.source_types)
+    def test_can_patch_attribute_name(self, source: str, admin_user: str):
+        source_key = self._get_source_info(source).label_source_key
+        label = next(
+            (
+                l
+                for l in self.labels
+                if l.get(source_key) and not l["has_parent"] and l.get("attributes")
+            )
+        )
+
+        attributes = deepcopy(label["attributes"])
+
+        for attribute in attributes:
+            attribute["name"] += "_updated"
+
+        expected_data, patch_data, ignore_fields = self._get_patch_data(
+            label, attributes=attributes
+        )
+
+        self._test_update_ok(
+            admin_user,
+            label["id"],
+            patch_data,
+            expected_data=expected_data,
+            ignore_fields=ignore_fields,
+        )
+
     @parametrize("source", _TestLabelsPermissionsBase.source_types)
     def test_cannot_patch_sublabel_directly(self, admin_user, source):
         user = admin_user