youtube_abschrift_korrigieren/tests/test_aenderungen.py
dschlueter 82ce30ca72 feat: Änderungsbericht listet eigenmächtige Modelländerungen „Zu prüfen“
Verglichen wird der Text nach den Glossar-Ersetzungen mit dem Ergebnis des
Modells. Gemeldet werden ersetzte gültige Wörter (Systemwortliste
/usr/share/dict/ngerman bzw. american-english), stark veränderte, eingefügte
und gestrichene Wörter; Hörfehler-Korrekturen, reine Zusammen-/Getrennt-
schreibung, Füllwörter und Glossarwörter nicht. Eigener Abschnitt im
HTML-Bericht, Rahmen im Text, Liste in der Konsole. aenderungen.py versteht
dafür -g und -l.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-11 21:32:06 +02:00

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"""Tests for aenderungen.py (change report raw transcript -> corrected text)."""
import html
import re
import sys
from pathlib import Path
import pytest
import aenderungen as ae
def changes(raw, corrected):
return [(tag, " ".join(old), " ".join(new))
for tag, old, new in ae.compare(raw, corrected).changes()]
def report_text(page):
"""Corrected text as shown in the report, without original/deleted words."""
body = page.split("<h2>Korrigierter Text</h2>")[1]
body = re.sub(r"<del[^>]*>.*?</del>|<span class=orig>.*?</span>", "", body)
return html.unescape(re.sub(r"<[^>]+>", " ", body)).split()
@pytest.mark.parametrize("raw, corrected", [
("das ist gut", "Das ist gut."), # case, punctuation
("all das zerstritten", "All das – zerstritten."), # dash only
("wie z.B. hier", "wie z. B. hier"), # split abbreviation
("eins zwei", "eins\n\nzwei"), # paragraph break
])
def test_expected_edits_are_no_changes(raw, corrected):
assert changes(raw, corrected) == []
@pytest.mark.parametrize("raw, corrected", [
("gibt's", "gibt’s"), # apostrophe variants
("er sagte Frieden", "Er sagte ‚Frieden‘."), # quotes at the edges
])
def test_apostrophes_and_quotes_unchanged(raw, corrected):
assert changes(raw, corrected) == []
def test_apostrophe_inside_word_is_a_change():
assert changes("Egon Bahrs Politik", "Egon Bahr’s Politik") == [
("replace", "Bahrs", "Bahr’s"),
]
def test_english_review_marks():
comparison = ae.compare("his name is Kocher", "His name is Kocher [check: Kocha].")
assert list(comparison.changes()) == []
assert sum(len(m) for m in comparison.marks.values()) == 1
def test_replace_insert_delete():
raw = "die gedeiliche Zusammenarbeit war das gut heute"
corrected = "die gedeihliche Zusammenarbeit war doch gut"
assert changes(raw, corrected) == [
("replace", "gedeiliche", "gedeihliche"),
("replace", "das", "doch"),
("delete", "heute", ""),
]
assert changes("ein Wort", "ein neues Wort") == [("insert", "", "neues")]
def test_change_summary_counts_and_sorts():
raw = "Kremmel und Kremmel und Bar"
corrected = "Kreml und Kreml und Bahr"
assert ae.change_summary(ae.compare(raw, corrected)) == [
("Kremmel", "Kreml", 2), ("Bar", "Bahr", 1),
]
def test_review_marks_are_not_changes_but_shown():
corrected = "Er heißt Gerhard [prüfen: Ghard] Kocher."
comparison = ae.compare("Er heißt Gerhard Kocher", corrected)
assert list(comparison.changes()) == []
page = ae.render_html(comparison, "t")
assert "<span class=check>[prüfen: Ghard]</span>" in page
assert "1 Prüfmarken" in page
def test_render_html_shows_text_original_and_paragraphs():
raw = "die gedeiliche Zusammenarbeit <b> ist gut heute neuer Absatz"
corrected = "Die gedeihliche Zusammenarbeit <b> ist gut.\n\nNeuer Absatz."
page = ae.render_html(ae.compare(raw, corrected), "Rede & Co")
assert report_text(page) == corrected.split()
assert "title='Original: gedeiliche'" in page
assert "<del title='gestrichen'>heute</del>" in page
assert "&lt;b&gt;" in page and "<b>" not in page.split("<body>")[1]
assert "Rede &amp; Co" in page
assert page.split("<h2>Korrigierter Text</h2>")[1].count("<p>") == 2
def test_report_path():
assert ae.report_path(Path("a/rede.korrigiert.txt")) == Path("a/rede.aenderungen.html")
assert ae.report_path(Path("out.txt")) == Path("out.aenderungen.html")
def test_cli(tmp_path, monkeypatch, capsys):
raw = tmp_path / "rede.vtt"
raw.write_text(
"WEBVTT\n\n00:00:01.000 --> 00:00:02.000\ndas Kremmel heute\n", encoding="utf-8"
)
corrected = tmp_path / "rede.korrigiert.txt"
corrected.write_text("Das Kreml heute.\n", encoding="utf-8")
monkeypatch.setattr(sys, "argv", ["aenderungen.py", "-a", str(raw), "-b", str(corrected)])
ae.main()
assert (tmp_path / "rede.aenderungen.html").is_file()
out = capsys.readouterr().out
assert "1× „Kremmel“ → „Kreml“" in out
def test_cli_missing_file(tmp_path, monkeypatch, capsys):
monkeypatch.setattr(sys, "argv", ["aenderungen.py", "-a", "fehlt.txt", "-b", "fehlt.txt"])
with pytest.raises(SystemExit):
ae.main()
assert "Datei nicht gefunden" in capsys.readouterr().err
# === Suspect changes ===
WORDS = {"professor", "das", "dass", "ist", "haus", "unterschreiben", "bar"}
def suspects(model_input, corrected, wordlist=WORDS, known=()):
found = ae.review_candidates(ae.compare(model_input, corrected), wordlist, set(known))
return [(s.reason, s.old, s.new) for s in found]
@pytest.mark.parametrize("model_input, corrected, expected", [
("Der Professor kam", "Der Professorin kam", [(ae.VALID_WORD, "Professor", "Professorin")]),
("wir unterschreiben das", "wir unterscheiden das",
[(ae.VALID_WORD, "unterschreiben", "unterscheiden")]),
("im CT1 heute", "im ZDF heute", [(ae.CHANGED_A_LOT, "CT1", "ZDF")]),
("er kam heute", "er ist kam heute", [(ae.INSERTED, "", "ist")]),
("er kam heute", "er kam", [(ae.DELETED, "heute", "")]),
])
def test_review_candidates_reports(model_input, corrected, expected):
assert suspects(model_input, corrected) == expected
@pytest.mark.parametrize("model_input, corrected", [
("das Kremmel heute", "das Kreml heute"), # recognition error
("die Gradwanderung", "die Gratwanderung"),
("die Clan Kriminalität", "die Clankriminalität"), # spacing only
("KI generierte Videos", "KI-generierte Videos"), # hyphen only
("er äh kam ähm heute", "er kam heute"), # fillers
("das ist gut", "Das ist gut."), # case, punctuation
])
def test_review_candidates_ignores(model_input, corrected):
assert suspects(model_input, corrected) == []
def test_review_candidates_glossary_words_are_known():
known = ae.glossary_words(["Egon Bahr"], [("Bars", "Bahrs")])
assert known == {"egon", "bahr", "bahrs"}
assert suspects("Bar sagte", "Bahr sagte", known=known) == []
assert suspects("Bar sagte", "Bahr sagte") == [(ae.VALID_WORD, "Bar", "Bahr")]
def test_review_candidates_without_wordlist():
# Similar replacements of real words go unnoticed, the rest still counts
assert suspects("Der Professor kam", "Der Professorin kam", wordlist=None) == []
assert suspects("im CT1 heute", "im ZDF heute", wordlist=None) == [
(ae.CHANGED_A_LOT, "CT1", "ZDF")
]
def test_review_candidates_indices_point_into_corrected_words():
comparison = ae.compare("a b Professor c d", "A b Professorin c d.")
[suspect] = ae.review_candidates(comparison, WORDS, set())
assert comparison.words[suspect.j1:suspect.j2] == ["Professorin"]
def test_load_wordlist(capsys):
assert "professor" in ae.load_wordlist("de")
assert ae.load_wordlist("en") is None
assert "keine Wortliste für „en“ (Paket wamerican)" in capsys.readouterr().out
def suspect_section(page):
return page.split("<h2>Zu prüfen")[1].split("<h2>Alle Änderungen")[0]
def test_report_suspects_only_against_model_input(tmp_path, capsys):
target = tmp_path / "bericht.html"
# Glossary turned "Kremmel" into "Kreml" before the model; the model
# replaced "Professor" and deleted "heute" on its own
comparison = ae.write_report(
"der Professor im Kremmel heute dort", "Der Professorin im Kreml dort.", target,
"rede", model_input="der Professor im Kreml heute dort",
)
page = target.read_text(encoding="utf-8")
section = suspect_section(page)
assert [s.reason for s in comparison.suspects] == [ae.VALID_WORD, ae.DELETED]
assert "Zu prüfen (2)" in page
assert "Professorin" in section and "Kremmel" not in section
assert "<span class=warn title='gültiges Wort ersetzt: „Professor“ → „Professorin“'>" in page
assert "<span class=warn title='gestrichen: „heute“ → „∅“'>⚠</span>" in page
# Framing changes nothing about the text itself
assert report_text(page) == "Der Professorin im Kreml ⚠ dort.".split()
ae.print_summary(comparison)
out = capsys.readouterr().out
assert "Zu prüfen: 2 Stellen" in out
assert "gültiges Wort ersetzt: „Professor“ → „Professorin“" in out
def test_report_without_suspects(tmp_path):
target = tmp_path / "bericht.html"
comparison = ae.write_report("das Kremmel", "Das Kreml.", target, "rede")
assert comparison.suspects == []
assert "Keine auffälligen Änderungen" in suspect_section(target.read_text(encoding="utf-8"))
def test_cli_glossary(tmp_path, monkeypatch, capsys):
raw = tmp_path / "rede.txt"
raw.write_text("das Kremmel und\nBar heute\n", encoding="utf-8")
corrected = tmp_path / "rede.korrigiert.txt"
corrected.write_text("Das Kreml und Bahr heute.\n", encoding="utf-8")
glossary = tmp_path / "g.txt"
glossary.write_text("Kremmel => Kreml\nEgon Bahr\n", encoding="utf-8")
argv = ["aenderungen.py", "-a", str(raw), "-b", str(corrected)]
monkeypatch.setattr(sys, "argv", argv)
ae.main()
assert "gültiges Wort ersetzt: „Bar“ → „Bahr“" in capsys.readouterr().out
monkeypatch.setattr(sys, "argv", [*argv, "-g", str(glossary)])
ae.main()
out = capsys.readouterr().out
assert "Zu prüfen: 0 Stellen" in out
# The report still compares against the raw transcript
assert "1× „Kremmel“ → „Kreml“" in out