test: add missing prompt validation for sync and async resource methods

Author: dhruvgupta2109

tests/test_required_args.py

@@ -2,6 +2,7 @@
 
 import pytest
 
+from openai import OpenAI, AsyncOpenAI
 from openai._utils import required_args
 
 
@@ -109,3 +110,28 @@ def foo(*, a: str | None = None, b: str | None = None, c: str | None = None) ->
     assert foo(a=None, b="bar") == "bar"
     assert foo(c=None) is None
     assert foo(c="foo") == "foo"
+
+
+def test_sync_resource_completions_create_missing_prompt(client: OpenAI) -> None:
+    with pytest.raises(TypeError, match=r"Expected either .*'model'.*'prompt'.*"):
+        client.completions.create(model="gpt-3.5-turbo-instruct")  # type: ignore[call-arg]
+
+
+def test_sync_resource_images_edit_missing_prompt(client: OpenAI) -> None:
+    with pytest.raises(TypeError, match=r"Expected either .*'image'.*'prompt'.*"):
+        client.images.edit(image=b"Example data")  # type: ignore[call-arg]
+
+
+def test_sync_resource_audio_transcriptions_create_missing_model(client: OpenAI) -> None:
+    with pytest.raises(TypeError, match=r"Expected either .*'file'.*'model'.*"):
+        client.audio.transcriptions.create(file=b"Example data")  # type: ignore[call-arg]
+
+
+async def test_async_resource_chat_completions_create_missing_messages(async_client: AsyncOpenAI) -> None:
+    with pytest.raises(TypeError, match=r"Expected either .*'messages'.*'model'.*"):
+        async_client.chat.completions.create(model="gpt-5.4")  # type: ignore[call-arg]
+
+
+async def test_async_resource_images_generate_missing_prompt(async_client: AsyncOpenAI) -> None:
+    with pytest.raises(TypeError, match=r"Expected either .*'prompt'.*"):
+        async_client.images.generate()  # type: ignore[call-arg]