Fix unit tests

Change-Id: Ic6e25fc3c931b69d4606ef80f9517a9a1c7c089c
Co-developed-by: Cursor <noreply@cursor.com>

Author: Cirilla-zmh

instrumentation-loongsuite/loongsuite-instrumentation-google-adk/tests/test_metrics.py

@@ -358,6 +358,7 @@ async def test_llm_metrics_with_error(self):
         mock_llm_request = Mock()
         mock_llm_request.model = "gemini-pro"
         mock_llm_request.config = Mock()
+        mock_llm_request.contents = None
 
         mock_callback_context = create_mock_callback_context()
 

instrumentation-loongsuite/loongsuite-instrumentation-google-adk/tests/test_plugin_integration.py

@@ -502,6 +502,7 @@ async def test_error_handling_attributes(self):
         mock_llm_request = Mock()
         mock_llm_request.model = "gemini-pro"
         mock_llm_request.config = Mock()
+        mock_llm_request.contents = None
 
         mock_callback_context = create_mock_callback_context(
             "session_err", "user_err"