Merge pull request #39074 from BerriAI/litellm_fix_websearch_tool_selection_test

test(websearch): register configured search tool in pre-request hook test

tests/pass_through_unit_tests/test_websearch_interception_e2e.py

@@ -937,6 +937,14 @@ async def test_pre_request_hook_modifies_request_body():
 
     print("✅ WebSearchInterceptionLogger initialized")
 
+    mock_router = MagicMock()
+    mock_router.search_tools = [
+        {
+            "search_tool_name": "test-search-tool",
+            "litellm_params": {"search_provider": "tavily"},
+        }
+    ]
+
     # Track what actually gets sent to the API
     captured_request = {}
 
@@ -987,6 +995,9 @@ async def test_pre_request_hook_modifies_request_body():
     with patch(
         "litellm.llms.anthropic.experimental_pass_through.messages.handler.anthropic_messages_handler",
         side_effect=mock_anthropic_messages_handler,
+    ), patch(  # test-quality-ok: the hook imports this process-global router at call time; no injection seam exists to register search_tools
+        "litellm.proxy.proxy_server.llm_router",
+        mock_router,
     ):
 
         print(