[Misc] Introduce encode_*_url utility function (#31208)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

tests/entrypoints/openai/test_audio.py

@@ -8,7 +8,7 @@ import pytest
 import pytest_asyncio
 
 from vllm.assets.audio import AudioAsset
-from vllm.multimodal.utils import encode_audio_base64, fetch_audio
+from vllm.multimodal.utils import encode_audio_base64, encode_audio_url, fetch_audio
 
 from ...utils import RemoteOpenAIServer
 
@@ -53,6 +53,14 @@ def base64_encoded_audio() -> dict[str, str]:
     }
 
 
+@pytest.fixture(scope="session")
+def url_encoded_audio() -> dict[str, str]:
+    return {
+        audio_url: encode_audio_url(*fetch_audio(audio_url))
+        for audio_url in TEST_AUDIO_URLS
+    }
+
+
 def dummy_messages_from_audio_url(
     audio_urls: str | list[str],
     content_text: str = "What's happening in this audio?",
@@ -149,11 +157,9 @@ async def test_single_chat_session_audio_base64encoded(
     client: openai.AsyncOpenAI,
     model_name: str,
     audio_url: str,
-    base64_encoded_audio: dict[str, str],
+    url_encoded_audio: dict[str, str],
 ):
-    messages = dummy_messages_from_audio_url(
-        f"data:audio/wav;base64,{base64_encoded_audio[audio_url]}"
-    )
+    messages = dummy_messages_from_audio_url(url_encoded_audio[audio_url])
 
     # test single completion
     chat_completion = await client.chat.completions.create(