dschlueter
ba61434798
- Kombiniert yt_untertitel.py und vtt2txt.py; die VTT bleibt temporär - Standardsprache ist die des Original-Audios (original_language()) - -o Ausgabedatei, Standard output.txt - Tests ohne Netz, README Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
116 lines
4 KiB
Python
116 lines
4 KiB
Python
"""Tests for extract_text.py; yt-dlp is always replaced by fakes (no network)."""
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import json
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import subprocess
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import sys
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from pathlib import Path
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import pytest
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import extract_text
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import yt_untertitel as yt
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URL = "https://www.youtube.com/watch?v=abc123"
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VTT = (
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"WEBVTT\n\n"
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"00:00:01.000 --> 00:00:02.000\n \nGuten<00:00:01.500><c> Abend.</c>\n\n"
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"00:00:02.000 --> 00:00:03.000\nGuten Abend.\nSchön, dass Sie da sind.\n"
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)
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GERMAN_VIDEO = {
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"id": "abc123",
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"title": "Eine Rede",
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"subtitles": {"en": []},
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"automatic_captions": {"de-orig": [], "de": [], "en": []},
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}
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def fake_yt_dlp(info, vtt=VTT):
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"""Stand-in for subprocess.run: answers the info request, writes the VTT file."""
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calls = []
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def run(command, capture_output, text):
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calls.append(command)
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if "--dump-single-json" in command:
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return subprocess.CompletedProcess(command, 0, json.dumps(info), "")
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track = command[command.index("--sub-langs") + 1]
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template = command[command.index("-o") + 1]
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Path(template.replace("%(ext)s", f"{track}.vtt")).write_text(vtt, encoding="utf-8")
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return subprocess.CompletedProcess(command, 0, "", "")
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run.calls = calls
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return run
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@pytest.fixture(autouse=True)
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def yt_dlp_installed(monkeypatch):
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monkeypatch.setattr(extract_text.shutil, "which", lambda name: f"/usr/bin/{name}")
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def run_main(monkeypatch, *args):
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monkeypatch.setattr(sys, "argv", ["extract_text.py", *map(str, args)])
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extract_text.main()
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def test_default_language_is_original_audio(tmp_path, monkeypatch, capsys):
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run = fake_yt_dlp(GERMAN_VIDEO)
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monkeypatch.setattr(yt.subprocess, "run", run)
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monkeypatch.chdir(tmp_path)
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run_main(monkeypatch, "-u", URL)
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text = (tmp_path / "output.txt").read_text(encoding="utf-8")
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assert text == "Guten Abend.\nSchön, dass Sie da sind.\n"
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assert "de-orig" in run.calls[1]
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assert "--write-auto-subs" in run.calls[1]
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out = capsys.readouterr().out
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assert "output.txt (2 Zeilen, 7 Wörter)" in out
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# Only the text file remains, no VTT
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assert [p.name for p in tmp_path.iterdir()] == ["output.txt"]
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def test_explicit_language_prefers_manual(tmp_path, monkeypatch):
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run = fake_yt_dlp(GERMAN_VIDEO)
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monkeypatch.setattr(yt.subprocess, "run", run)
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target = tmp_path / "neu" / "rede.en.txt"
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run_main(monkeypatch, "-u", URL, "-l", "en", "-o", target)
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assert target.is_file()
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assert "--write-subs" in run.calls[1]
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def test_original_language_from_metadata_without_auto_captions(tmp_path, monkeypatch):
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info = {"id": "x", "language": "fr", "subtitles": {"fr": []}, "automatic_captions": {}}
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run = fake_yt_dlp(info)
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monkeypatch.setattr(yt.subprocess, "run", run)
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run_main(monkeypatch, "-u", URL, "-o", tmp_path / "out.txt")
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assert run.calls[1][run.calls[1].index("--sub-langs") + 1] == "fr"
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@pytest.mark.parametrize("info, args, message", [
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# Translation only: no "en-orig", no manual "en"
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(GERMAN_VIDEO, ["-l", "fr"], "Keine Untertitel in „fr“"),
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({"id": "x", "subtitles": {}, "automatic_captions": {}}, [], "Originalsprache"),
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])
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def test_no_matching_track(tmp_path, monkeypatch, info, args, message):
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monkeypatch.setattr(yt.subprocess, "run", fake_yt_dlp(info))
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with pytest.raises(SystemExit, match=message):
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run_main(monkeypatch, "-u", URL, "-o", tmp_path / "out.txt", *args)
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assert not (tmp_path / "out.txt").exists()
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def test_empty_subtitles(tmp_path, monkeypatch):
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monkeypatch.setattr(yt.subprocess, "run", fake_yt_dlp(GERMAN_VIDEO, vtt="WEBVTT\n"))
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with pytest.raises(SystemExit, match="keinen Text"):
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run_main(monkeypatch, "-u", URL, "-o", tmp_path / "out.txt")
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@pytest.mark.parametrize("args, message", [
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([], "required"),
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(["-u", URL, "-o", "{dir}"], "ist ein Verzeichnis"),
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])
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def test_cli_errors(tmp_path, monkeypatch, capsys, args, message):
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args = [a.format(dir=tmp_path) for a in args]
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with pytest.raises(SystemExit) as exc:
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run_main(monkeypatch, *args)
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assert exc.value.code == 2
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assert message in capsys.readouterr().err
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