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from unittest.mock import patch
import pytest
from youtube_transcript_api._errors import IpBlocked, TranscriptsDisabled
from app.transcriber import (
InvalidURLError,
IPBlockedError,
TranscriptDisabledError,
create_api,
extract_video_id,
fetch_transcript_by_id,
)
class TestExtractVideoId:
def test_standard_url(self) -> None:
assert extract_video_id("https://www.youtube.com/watch?v=dQw4w9WgXcQ") == "dQw4w9WgXcQ"
def test_short_url(self) -> None:
assert extract_video_id("https://youtu.be/dQw4w9WgXcQ") == "dQw4w9WgXcQ"
def test_embed_url(self) -> None:
assert extract_video_id("https://www.youtube.com/embed/dQw4w9WgXcQ") == "dQw4w9WgXcQ"
def test_shorts_url(self) -> None:
assert extract_video_id("https://www.youtube.com/shorts/dQw4w9WgXcQ") == "dQw4w9WgXcQ"
def test_no_protocol(self) -> None:
assert extract_video_id("youtube.com/watch?v=dQw4w9WgXcQ") == "dQw4w9WgXcQ"
def test_invalid_url(self) -> None:
try:
extract_video_id("https://example.com/video")
assert False, "Expected InvalidURLError"
except InvalidURLError:
pass
class TestCreateApi:
def test_create_api_has_browser_user_agent(self) -> None:
api = create_api()
# The session is stored on the fetcher inside the API instance.
session = api._fetcher._http_client
ua = session.headers.get("User-Agent", "")
assert "Chrome" in ua
class TestFetchTranscriptById:
def test_fetch_transcript_by_id_raises_ip_blocked(self) -> None:
api = create_api()
with patch.object(api, "fetch", side_effect=IpBlocked(video_id="test")):
with pytest.raises(IPBlockedError):
fetch_transcript_by_id("test", api)
def test_fetch_transcript_by_id_raises_transcript_disabled(self) -> None:
api = create_api()
with patch.object(api, "fetch", side_effect=TranscriptsDisabled(video_id="test")):
with pytest.raises(TranscriptDisabledError):
fetch_transcript_by_id("test", api)
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