feat: Integrate roman numeral normalization in chapter titles and enhance related tests

tests/test_text_normalization.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from abogen.kokoro_text_normalization import normalize_roman_numeral_titles
 from abogen.web.conversion_runner import _normalize_for_pipeline
 
 
@@ -27,3 +28,38 @@ def test_terminal_punctuation_respects_closing_quotes():
     normalized = _normalize_for_pipeline('"Chapter 1"')
     compact = normalized.replace(" ", "")
     assert compact.endswith('."')
+
+
+def test_normalization_preserves_spacing_around_quotes_and_hyphen():
+    sample = "“Still,” said Château-Renaud, “Dr. d’Avrigny, who attends my mother, declares he is in despair about it."
+    normalized = _normalize_for_pipeline(sample)
+
+    assert normalized.startswith(
+        "“Still,” said Château-Renaud, “Doctor d'Avrigny, who attends my mother, declares he is in despair about it."
+    )
+    assert "  " not in normalized
+    assert "Château-Renaud" in normalized
+    assert "Doctor d'Avrigny" in normalized
+
+
+def test_normalize_roman_titles_converts_when_majority() -> None:
+    titles = ["I: Opening", "II: Rising Action", "III: Climax"]
+    normalized = normalize_roman_numeral_titles(titles)
+
+    assert normalized == ["1: Opening", "2: Rising Action", "3: Climax"]
+
+
+def test_normalize_roman_titles_skips_when_not_majority() -> None:
+    titles = ["Preface", "I: Opening", "Acknowledgements"]
+    normalized = normalize_roman_numeral_titles(titles)
+
+    assert normalized == titles
+
+
+def test_normalize_roman_titles_preserves_separators() -> None:
+    titles = ["  IV.  The Trial", "V - The Verdict", "VI\nAftermath"]
+    normalized = normalize_roman_numeral_titles(titles)
+
+    assert normalized[0] == "  4.  The Trial"
+    assert normalized[1] == "5 - The Verdict"
+    assert normalized[2].startswith("6\nAftermath")