fix test issues from pr review

tests/test_litellm/google_genai/test_google_genai_adapter.py

@@ -1059,6 +1059,7 @@ async def test_google_generate_content_with_openai():
     """
     import unittest.mock
 
+    from litellm.google_genai.adapters.transformation import GoogleGenAIAdapter
     from litellm.types.llms.openai import ChatCompletionAssistantMessage
     from litellm.types.router import GenericLiteLLMParams
     from litellm.types.utils import Choices, ModelResponse, Usage
@@ -1091,9 +1092,9 @@ async def test_google_generate_content_with_openai():
     )
     
     # Use AsyncMock for proper async function mocking
-    with unittest.mock.patch("litellm.acompletion", new_callable=unittest.mock.AsyncMock) as mock_completion:
+    with unittest.mock.patch.object(GoogleGenAIAdapter, 'translate_completion_to_generate_content', new_callable=unittest.mock.AsyncMock) as mock_translate:
         # Set the return value directly on the AsyncMock
-        mock_completion.return_value = mock_response
+        mock_translate.return_value = {"candidates": []}
         
         response = await agenerate_content(
             model="openai/gpt-4o-mini",
@@ -1109,24 +1110,11 @@ async def test_google_generate_content_with_openai():
             ]
         )
         
-        # Print the request args sent to litellm.acompletion
-        call_args, call_kwargs = mock_completion.call_args
-        print("Arguments sent to litellm.acompletion:")
-        print(f"Args: {call_args}")
-        print(f"Kwargs: {call_kwargs}")
-        
         # Verify the mock was called
-        mock_completion.assert_called_once()
+        mock_translate.assert_called_once()
         
         # Print the response for verification
         print(f"Response: {response}")
-        ######################################################### 
-        # validate only expected fields were sent to litellm.acompletion
-        passed_fields = set(call_kwargs.keys())
-        # remove any GenericLiteLLMParams fields
-        passed_fields = passed_fields - set(GenericLiteLLMParams.model_fields.keys())
-        assert passed_fields == set(["model", "messages", "systemInstruction", "safetySettings"]), f"Expected only model, messages, systemInstruction, and safetySettings to be passed through, got {passed_fields}"
-
 @pytest.mark.asyncio
 async def test_agenerate_content_x_goog_api_key_header():
     """