Added LiteLLM to the stack

Development/litellm/tests/test_litellm/llms/litellm_proxy/chat/test_litellm_proxy_chat_transformation.py

@@ -0,0 +1,42 @@
+from typing import Optional
+from unittest.mock import patch
+
+import pytest
+
+import litellm
+from litellm.llms.litellm_proxy.chat.transformation import LiteLLMProxyChatConfig
+
+
+def test_litellm_proxy_chat_transformation():
+    """
+    Assert messages are not transformed when calling litellm proxy
+    """
+    config = LiteLLMProxyChatConfig()
+    file_content = [
+        {"type": "text", "text": "What is this document about?"},
+        {
+            "type": "file",
+            "file": {
+                "file_id": "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf",
+                "format": "application/pdf",
+            },
+        },
+    ]
+    messages = [{"role": "user", "content": file_content}]
+    assert config.transform_request(
+        model="model",
+        messages=messages,
+        optional_params={},
+        litellm_params={},
+        headers={},
+    ) == {"model": "model", "messages": messages}
+
+
+def test_litellm_gateway_from_sdk_with_user_param():
+    from litellm.llms.litellm_proxy.chat.transformation import LiteLLMProxyChatConfig
+
+    supported_params = LiteLLMProxyChatConfig().get_supported_openai_params(
+        "openai/gpt-4o"
+    )
+    print(f"supported_params: {supported_params}")
+    assert "user" in supported_params