test: add test for PaginatedResponse url field population in dynamic routes

tests/unit/server/test_sse.py

@@ -5,10 +5,12 @@
 # the root directory of this source tree.
 
 import asyncio
+from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
-from llama_stack.distribution.server.server import create_sse_event, sse_generator
+from llama_stack.apis.common.responses import PaginatedResponse
+from llama_stack.distribution.server.server import create_dynamic_typed_route, create_sse_event, sse_generator
 
 
 @pytest.mark.asyncio
@@ -89,3 +91,24 @@ async def test_sse_generator_error_before_response_starts():
     # We should have 1 error event
     assert len(seen_events) == 1
     assert 'data: {"error":' in seen_events[0]
+
+
+@pytest.mark.asyncio
+async def test_paginated_response_url_setting():
+    """Test that PaginatedResponse gets url set to route path."""
+
+    async def mock_api_method():
+        return PaginatedResponse(data=[], has_more=False, url=None)
+
+    route_handler = create_dynamic_typed_route(mock_api_method, "get", "/test/route")
+
+    # Mock minimal request
+    request = MagicMock()
+    request.scope = {"user_attributes": {}, "principal": ""}
+    request.headers = {}
+    request.body = AsyncMock(return_value=b"")
+
+    result = await route_handler(request)
+
+    assert isinstance(result, PaginatedResponse)
+    assert result.url == "/test/route"