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The word-level pass catches single-word Whisper loops ("URL URL URL…")
but misses two common hallucination patterns the PR had to claim as
"edge cases":
1. Multi-word English loops — "thanks for watching thanks for watching…"
× 6 sails through because no two consecutive tokens are identical
after text.split().
2. CJK loops — "謝謝觀看" × 7 sails through because text.split() returns
a single unsplit token for the whole loop (no whitespace between
characters).
Add a character-level second pass: a non-greedy regex finds any 2–60
char substring that repeats min_run+ times immediately after itself and
strips the run. The 2-char floor keeps emphasised single-letter runs
("wooooooow") intact. The 60-char ceiling covers every observed
Whisper tail hallucination ("Please like and subscribe to my
channel.", "Subtitles by the Amara.org community") while staying short
enough that coincidental long-phrase repetition in legitimate speech
doesn't hit the threshold. Whitespace normalisation only runs when the
pass actually stripped something, so untouched transcripts keep their
original spacing.
New test_refinement_collapse.py gives the pre-processor its first
deterministic unit-test coverage: 17 tests pinning the word-level
legacy behaviour plus the new multi-word English / CJK / Japanese /
emphasis-preservation cases.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
Backend Tests
Manual test scripts for debugging and validating backend functionality.
Test Files
test_generation_progress.py
Tests TTS generation with SSE progress monitoring to identify UX issues where users see download progress even when the model is already cached.
Usage:
cd backend
python tests/test_generation_progress.py
Prerequisites:
- Server must be running (
python main.py) - At least one voice profile must exist
test_real_download.py
Tests real model download with SSE progress monitoring.
Usage:
cd backend
# Delete cache first to force fresh download
rm -rf ~/.cache/huggingface/hub/models--openai--whisper-base
python tests/test_real_download.py
Prerequisites:
- Server must be running (
python main.py)
test_progress.py
Unit tests for ProgressManager and HFProgressTracker functionality.
Usage:
cd backend
python tests/test_progress.py
test_check_progress_state.py
Debugging script to inspect the internal state of ProgressManager and TaskManager.
Usage:
cd backend
python tests/test_check_progress_state.py
Notes
These are manual test scripts, not automated unit tests. They're designed for:
- Debugging progress tracking issues
- Validating SSE event streams
- Monitoring real-time download behavior
- Inspecting internal state during development