tests/test_media.py

from gaia_agent.tools import transcribe_youtube


def test_youtube_tool_rejects_non_youtube_hosts() -> None:
    try:
        transcribe_youtube("https://example.com/video")
    except ValueError as error:
        assert str(error) == "only YouTube video URLs are supported"
    else:
        raise AssertionError("non-YouTube host was accepted")