fixed test

Author: jiwon-oai

tests/test_agents.py

@@ -569,7 +569,7 @@ async def test_input_item_converter_generated_image_item():
     assert content[0].get("type") == "input_text"
     assert content[0].get("text") == "The following image was generated by the agent."
     assert content[1].get("type") == "input_image"
-    assert content[1].get("file_id") == "img_1"
+    assert content[1].get("file_id") is None
     assert content[1].get("image_url") == "https://example.com/img.png"
     assert content[1].get("detail") == "auto"