fix: move mapping.clear() after call to format request and update expected tooluseid in relevant test

Author: AirswitchAsa

src/strands/models/gemini.py

@@ -374,9 +374,8 @@ async def stream(
         Raises:
             ModelThrottledException: If the request is throttled by Gemini.
         """
-        self._tool_use_id_to_name.clear()
-
         request = self._format_request(messages, tool_specs, system_prompt, self.config.get("params"))
+        self._tool_use_id_to_name.clear()
 
         client = genai.Client(**self.client_args).aio
         try:

tests/strands/models/test_gemini.py

@@ -459,7 +459,7 @@ async def test_stream_response_tool_use(gemini_client, model, messages, agenerat
     exp_chunks = [
         {"messageStart": {"role": "assistant"}},
         {"contentBlockStart": {"start": {}}},
-        {"contentBlockStart": {"start": {"toolUse": {"name": "calculator", "toolUseId": "calculator"}}}},
+        {"contentBlockStart": {"start": {"toolUse": {"name": "calculator", "toolUseId": "c1"}}}},
         {"contentBlockDelta": {"delta": {"toolUse": {"input": '{"expression": "2+2"}'}}}},
         {"contentBlockStop": {}},
         {"contentBlockStop": {}},