path: root/app/tests/test_converter.py

"""Tests for the audiobook converter orchestration helpers."""

import io
import logging
import tempfile
import time
import unittest
from contextlib import redirect_stdout
from pathlib import Path
from unittest.mock import MagicMock, patch

from converter import config
from converter.clients import (
    BACKEND_AUDIOCPP,
    BACKEND_FASTER,
    BACKEND_QWEN,
    VOICE_MODE_CLONE,
    VOICE_MODE_CUSTOM,
)
from converter import converter as converter_mod
from converter.converter import (
    AudiobookConverter,
    find_existing_outputs,
    prompt_overwrite,
    setup_logging,
)


class SanitizeFilenameTests(unittest.TestCase):
    def test_removes_invalid_characters(self):
        self.assertEqual(AudiobookConverter._sanitize_filename('A "bad" name: here'),
                         "A bad name here")

    def test_collapses_whitespace(self):
        self.assertEqual(AudiobookConverter._sanitize_filename("  spaced\tout  "), "spaced out")

    def test_empty_falls_back(self):
        self.assertEqual(AudiobookConverter._sanitize_filename("///"), "chapter")


class ConfigurationValidationTests(unittest.TestCase):
    def test_invalid_voice_mode_rejected(self):
        with self.assertRaises(ValueError):
            AudiobookConverter(voice_mode="custon_voice")

    def test_nonpositive_speed_rejected(self):
        with self.assertRaises(ValueError):
            AudiobookConverter(speed=0)

    def test_unknown_format_rejected(self):
        with self.assertRaises(ValueError):
            AudiobookConverter(output_format="wma")

    def test_unknown_language_rejected(self):
        with self.assertRaises(ValueError):
            AudiobookConverter(language="klingon")

    def test_unknown_backend_rejected(self):
        with self.assertRaises(ValueError) as ctx:
            AudiobookConverter(backend="piper")
        self.assertIn("piper", str(ctx.exception))
        self.assertIn("audiocpp", str(ctx.exception))

    def test_language_defaults_to_config(self):
        with patch("converter.converter.QwenTTSClient") as mock_tts:
            AudiobookConverter(backend=BACKEND_QWEN)
        self.assertEqual(mock_tts.call_args.kwargs["language"], config.LANGUAGE)

    def test_output_format_defaults_to_config(self):
        with patch("converter.converter.QwenTTSClient"):
            converter = AudiobookConverter(backend=BACKEND_QWEN)
        self.assertEqual(converter.output_format, config.AUDIO_FORMAT)

    def test_language_normalized_before_tts_client(self):
        with patch("converter.converter.QwenTTSClient") as mock_tts:
            converter = AudiobookConverter(language="ja", backend=BACKEND_QWEN)
        self.assertEqual(converter.language, "Japanese")
        self.assertEqual(mock_tts.call_args.kwargs["language"], "Japanese")


class FindExistingOutputsTests(unittest.TestCase):
    def setUp(self):
        self._tmp = tempfile.TemporaryDirectory()
        self.folder = Path(self._tmp.name)
        self._original = converter_mod.AUDIOBOOKS_FOLDER
        converter_mod.AUDIOBOOKS_FOLDER = self.folder

    def tearDown(self):
        converter_mod.AUDIOBOOKS_FOLDER = self._original
        self._tmp.cleanup()

    def _touch(self, name):
        path = self.folder / name
        path.write_bytes(b"x")
        return path

    def test_no_existing_output(self):
        self.assertEqual(find_existing_outputs("dune", "mp3"), [])

    def test_primary_output_detected(self):
        self._touch("dune.mp3")
        self.assertEqual([p.name for p in find_existing_outputs("dune", "mp3")],
                         ["dune.mp3"])

    def test_chapter_and_speed_copies_detected(self):
        for name in ("dune_01_Dune.mp3", "dune_02_Barony.mp3", "dune_1.5x.mp3"):
            self._touch(name)
        self._touch("dune2_01.mp3")  # different book stem; must not match
        found = [p.name for p in find_existing_outputs("dune", "mp3")]
        self.assertEqual(len(found), 3)

    def test_other_extensions_ignored(self):
        self._touch("dune.mp3")
        self.assertEqual(find_existing_outputs("dune", "m4b"), [])

    def test_glob_metacharacters_in_stem(self):
        self._touch("book [1].mp3")
        self._touch("book [1]_1.5x.mp3")
        found = [p.name for p in find_existing_outputs("book [1]", "mp3")]
        self.assertEqual(sorted(found), ["book [1].mp3", "book [1]_1.5x.mp3"])

    def test_narrator_named_outputs_detected(self):
        for name in ("dune_Vivian.mp3", "dune_Vivian_1.5.mp3", "dune_Vivian_01_Dune.mp3"):
            self._touch(name)
        found = [p.name for p in find_existing_outputs("dune_Vivian", "mp3")]
        self.assertEqual(len(found), 3)

    def test_legacy_outputs_without_narrator_ignored(self):
        self._touch("dune.mp3")
        self._touch("dune_1.5.mp3")
        self.assertEqual(find_existing_outputs("dune_Vivian", "mp3"), [])


class NarratorTagTests(unittest.TestCase):
    def _converter(self, voice_mode, ref_audio=None, instructions=None):
        converter = AudiobookConverter.__new__(AudiobookConverter)
        converter.voice_mode = voice_mode
        converter.voice_clone_ref_audio = ref_audio
        converter.backend = BACKEND_QWEN
        converter.voice = None
        converter.instructions = instructions
        return converter

    def test_custom_voice_uses_speaker_display_name(self):
        self.assertEqual(self._converter(VOICE_MODE_CUSTOM)._narrator_tag(),
                         "Vivian")

    def test_multi_word_display_name_gets_underscores(self):
        with patch.object(config, "SPEAKER", "uncle_fu"):
            self.assertEqual(self._converter(VOICE_MODE_CUSTOM)._narrator_tag(),
                             "Uncle_Fu")

    def test_clone_uses_reference_audio_stem(self):
        self.assertEqual(self._converter(VOICE_MODE_CLONE, "/x/ref.wav")._narrator_tag(),
                         "ref")

    def test_clone_stem_spaces_become_underscores(self):
        self.assertEqual(self._converter(VOICE_MODE_CLONE, "/x/my voice.wav")._narrator_tag(),
                         "my_voice")

    def test_invalid_characters_sanitized(self):
        self.assertEqual(self._converter(VOICE_MODE_CLONE, "/x/bad:name?.wav")._narrator_tag(),
                         "bad_name")

    def test_empty_after_sanitize_falls_back(self):
        self.assertEqual(self._converter(VOICE_MODE_CLONE, "/x/???.wav")._narrator_tag(),
                         "narrator")

    def _audiocpp_converter(self, voice=None, instructions=None):
        converter = self._converter(VOICE_MODE_CUSTOM,
                                    instructions=instructions)
        converter.backend = BACKEND_AUDIOCPP
        converter.voice = voice
        return converter

    def test_audiocpp_design_run_uses_designed_tag(self):
        # An instruction without a voice (voice design, or instruction-
        # defined voices) must not be named after the built-in speaker.
        converter = self._audiocpp_converter(instructions="A warm narrator")
        self.assertEqual(converter._narrator_tag(), "designed")

    def test_audiocpp_instruction_with_voice_keeps_voice_tag(self):
        converter = self._audiocpp_converter(
            voice="narrator", instructions="Calm delivery")
        self.assertEqual(converter._narrator_tag(), "narrator")

    def test_audiocpp_speaker_mode_keeps_speaker_tag(self):
        converter = self._audiocpp_converter()
        self.assertEqual(converter._narrator_tag(), "Vivian")

    def test_audiocpp_explicit_speaker_uses_speaker_tag(self):
        # A chosen CustomVoice speaker names the output, not config.SPEAKER.
        converter = self._audiocpp_converter(voice="Ryan")
        self.assertEqual(converter._narrator_tag(), "Ryan")

    def test_audiocpp_explicit_speaker_normalizes_display_name(self):
        converter = self._audiocpp_converter(voice="Uncle_Fu")
        self.assertEqual(converter._narrator_tag(), "Uncle_Fu")

    def test_preflight_design_run_uses_designed_tag(self):
        with tempfile.TemporaryDirectory() as books_tmp, \
                tempfile.TemporaryDirectory() as output_tmp:
            original = (converter_mod.BOOKS_FOLDER, converter_mod.AUDIOBOOKS_FOLDER)
            converter_mod.BOOKS_FOLDER = Path(books_tmp)
            converter_mod.AUDIOBOOKS_FOLDER = Path(output_tmp)
            try:
                (converter_mod.BOOKS_FOLDER / "book.txt").write_text(
                    "hello world", encoding="utf-8")
                with patch("builtins.input",
                           side_effect=AssertionError("should not prompt")):
                    _, planned = AudiobookConverter.preflight_overwrites(
                        BACKEND_AUDIOCPP, None, VOICE_MODE_CUSTOM,
                        None, "mp3", instructions="A warm narrator")
                self.assertEqual(planned, [(converter_mod.BOOKS_FOLDER / "book.txt",
                                            "book_designed")])
            finally:
                converter_mod.BOOKS_FOLDER, converter_mod.AUDIOBOOKS_FOLDER = original


class ChapterDebugDirTests(unittest.TestCase):
    """Per-chapter debug subfolder naming (chunk numbering restarts per chapter)."""

    def test_none_when_not_debugging(self):
        self.assertIsNone(AudiobookConverter._chapter_debug_dir(None, 3, "The Trial"))

    def test_chapter_subfolder_named_by_index_and_title(self):
        book_dir = Path("debug") / "dune_Vivian"
        chapter_dir = AudiobookConverter._chapter_debug_dir(book_dir, 3, "The Trial")
        self.assertEqual(chapter_dir, book_dir / "03_The Trial")

    def test_untitled_chapter_uses_fallback(self):
        chapter_dir = AudiobookConverter._chapter_debug_dir(Path("d"), 1, "")
        self.assertEqual(chapter_dir, Path("d") / "01_chapter")


class DebugDumpTests(unittest.TestCase):
    """--debug: per-chunk text/audio dumps and request/response logging."""

    def setUp(self):
        self._tmp = tempfile.TemporaryDirectory()
        self._debug_folder = patch.object(converter_mod, "DEBUG_FOLDER", Path(self._tmp.name))
        self._debug_folder.start()
        self.debug_root = Path(self._tmp.name)
        self.converter = AudiobookConverter.__new__(AudiobookConverter)
        self.converter.tts = MagicMock()

    def tearDown(self):
        self._debug_folder.stop()
        self._tmp.cleanup()

    def _chunk_source(self, name, body=b"audio"):
        path = self.debug_root / "sources" / name
        path.parent.mkdir(parents=True, exist_ok=True)
        path.write_bytes(body)
        return path

    def test_successful_chunk_dumps_text_and_audio(self):
        audio = self._chunk_source("chunk_0001.wav")
        self.converter.tts.process_chunk_with_retry.return_value = audio
        results = self.converter._synthesize_chunks(["Hello world."],
                                                    debug_dir=self.debug_root / "book")
        self.assertEqual(results, {1: audio})
        debug_dir = self.debug_root / "book"
        self.assertEqual((debug_dir / "chunk_0001.txt").read_text(encoding="utf-8"),
                         "Hello world.")
        self.assertEqual((debug_dir / "chunk_0001.wav").read_bytes(), b"audio")

    def test_failed_chunk_dumps_text_but_no_audio(self):
        self.converter.tts.process_chunk_with_retry.return_value = None
        results = self.converter._synthesize_chunks(["Hello again."],
                                                    debug_dir=self.debug_root / "book")
        self.assertEqual(results, {1: None})
        debug_dir = self.debug_root / "book"
        self.assertEqual([path.name for path in sorted(debug_dir.iterdir())],
                         ["chunk_0001.txt"])

    def test_text_dumped_even_when_request_raises(self):
        self.converter.tts.process_chunk_with_retry.side_effect = RuntimeError("boom")
        results = self.converter._synthesize_chunks(["Crash text."],
                                                    debug_dir=self.debug_root / "book")
        self.assertEqual(results, {1: None})
        self.assertEqual((self.debug_root / "book" / "chunk_0001.txt").read_text(
            encoding="utf-8"), "Crash text.")

    def test_audio_suffix_preserved_and_nested_dirs_created(self):
        audio = self._chunk_source("generated.mp3")
        self.converter.tts.process_chunk_with_retry.return_value = audio
        self.converter._synthesize_chunks(["Hello."],
                                          debug_dir=self.debug_root / "nested" / "book")
        self.assertTrue((self.debug_root / "nested" / "book" / "chunk_0001.mp3").exists())

    def test_no_debug_dir_writes_nothing(self):
        audio = self._chunk_source("chunk_0001.wav")
        self.converter.tts.process_chunk_with_retry.return_value = audio
        results = self.converter._synthesize_chunks(["Hello world."])
        self.assertEqual(results, {1: audio})
        self.assertEqual([path.name for path in self.debug_root.iterdir()], ["sources"])

    def test_request_and_response_are_logged(self):
        audio = self._chunk_source("chunk_0001.wav")
        self.converter.tts.process_chunk_with_retry.return_value = audio
        with self.assertLogs("converter.converter", level="DEBUG") as logs:
            self.converter._synthesize_chunks(["Hello world."],
                                              debug_dir=self.debug_root / "book")
        joined = "\n".join(logs.output)
        self.assertIn("Chunk 1/1 request text: Hello world.", joined)
        self.assertIn("Chunk 1/1 response in", joined)
        self.assertIn("chunk_0001.wav", joined)

    def test_debug_write_failure_does_not_abort_conversion(self):
        blocker = self.debug_root / "blocker"
        blocker.write_bytes(b"")
        audio = self._chunk_source("chunk_0001.wav")
        self.converter.tts.process_chunk_with_retry.return_value = audio
        results = self.converter._synthesize_chunks(["Hello."], debug_dir=blocker / "book")
        self.assertEqual(results, {1: audio})

    def test_failed_chunk_stops_remaining_chunks(self):
        audio = self._chunk_source("chunk_0001.wav")
        self.converter.tts.process_chunk_with_retry.side_effect = [audio, None, audio]
        results = self.converter._synthesize_chunks(["One.", "Two.", "Three."])
        self.assertEqual(results, {1: audio, 2: None})
        self.assertEqual(self.converter.tts.process_chunk_with_retry.call_count, 2)

    def test_raising_chunk_stops_remaining_chunks(self):
        audio = self._chunk_source("chunk_0001.wav")
        self.converter.tts.process_chunk_with_retry.side_effect = [audio, RuntimeError("boom")]
        results = self.converter._synthesize_chunks(["One.", "Two.", "Three."])
        self.assertEqual(results, {1: audio, 2: None})
        self.assertEqual(self.converter.tts.process_chunk_with_retry.call_count, 2)

    def test_debug_flag_wiring(self):
        with patch("converter.converter.QwenTTSClient"):
            self.assertFalse(AudiobookConverter(backend=BACKEND_QWEN).debug)
            self.assertTrue(AudiobookConverter(debug=True, backend=BACKEND_QWEN).debug)


class SetupLoggingTests(unittest.TestCase):
    """Console handler stays quiet; the log file keeps the full record."""

    def setUp(self):
        self._tmp = tempfile.TemporaryDirectory()
        self._logs_folder = patch.object(converter_mod, "LOGS_FOLDER", Path(self._tmp.name))
        self._logs_folder.start()
        self._root = logging.getLogger()
        self._saved_handlers = self._root.handlers[:]
        self._saved_level = self._root.level
        self._saved_converter_level = logging.getLogger("converter").level
        self._root.handlers.clear()

    def tearDown(self):
        for handler in self._root.handlers:
            if handler not in self._saved_handlers:
                handler.close()
        self._root.handlers[:] = self._saved_handlers
        self._root.setLevel(self._saved_level)
        logging.getLogger("converter").setLevel(self._saved_converter_level)
        self._logs_folder.stop()
        self._tmp.cleanup()

    def _console_handler(self):
        matches = [h for h in logging.getLogger().handlers
                   if isinstance(h, logging.StreamHandler)
                   and not isinstance(h, logging.FileHandler)]
        self.assertEqual(len(matches), 1)
        return matches[0]

    def _file_handler(self):
        matches = [h for h in logging.getLogger().handlers
                   if isinstance(h, logging.FileHandler)]
        self.assertEqual(len(matches), 1)
        return matches[0]

    def test_console_quiet_and_file_verbose_by_default(self):
        setup_logging()
        self.assertEqual(self._console_handler().level, logging.WARNING)
        self.assertEqual(self._file_handler().level, logging.INFO)

    def test_debug_flag_lowers_both_handlers(self):
        setup_logging(debug=True)
        self.assertEqual(self._console_handler().level, logging.DEBUG)
        self.assertEqual(self._file_handler().level, logging.DEBUG)

    def test_http_logs_filtered_from_console_only(self):
        setup_logging(debug=True)
        console = self._console_handler()
        http_record = logging.LogRecord("httpx", logging.INFO, "httpx", 1,
                                        "HTTP Request: GET ...", None, None)
        self.assertFalse(console.filter(http_record))
        chunk_record = logging.LogRecord("converter.converter", logging.DEBUG,
                                         "converter", 1,
                                         "Chunk 1/1 request text", None, None)
        self.assertTrue(console.filter(chunk_record))


class SynthesizeChunkLoggingTests(unittest.TestCase):
    """Chunk failures surface as a single ERROR record (no print echo)."""

    def setUp(self):
        self.converter = AudiobookConverter.__new__(AudiobookConverter)
        self.converter.tts = MagicMock()

    def test_failed_chunk_logs_single_error(self):
        self.converter.tts.process_chunk_with_retry.return_value = None
        with self.assertLogs("converter.converter", level="ERROR") as logs:
            results = self.converter._synthesize_chunks(["Hello."])
        self.assertEqual(results, {1: None})
        self.assertEqual(len(logs.output), 1)
        self.assertIn("Chunk 1/1 failed", logs.output[0])

    def test_raising_chunk_logs_single_error(self):
        self.converter.tts.process_chunk_with_retry.side_effect = RuntimeError("boom")
        with self.assertLogs("converter.converter", level="ERROR") as logs:
            results = self.converter._synthesize_chunks(["Hello."])
        self.assertEqual(results, {1: None})
        self.assertEqual(len(logs.output), 1)
        self.assertIn("Chunk 1/1 error: boom", logs.output[0])


class ChunkProgressOutputTests(unittest.TestCase):
    """The console reports chunk progress while a conversion runs."""

    def _converter(self):
        converter = AudiobookConverter.__new__(AudiobookConverter)
        converter.backend = BACKEND_AUDIOCPP
        converter.speed = 1.0
        converter.output_format = "mp3"
        converter.tts = MagicMock()
        converter.tts.process_chunk_with_retry.return_value = "chunk.wav"
        return converter

    def test_prints_chunk_progress(self):
        buf = io.StringIO()
        with redirect_stdout(buf):
            self._converter()._synthesize_chunks(["Hello."])
        out = buf.getvalue()
        self.assertIn("PROCESSING 1 CHUNKS", out)
        self.assertIn("Chunk   1/1 completed", out)
        self.assertIn("Successful: 1/1", out)

    def test_run_keeps_chunk_phrasing(self):
        buf = io.StringIO()
        with patch.object(converter_mod.audio, "combine_chunks", return_value=True), \
                redirect_stdout(buf):
            ok = self._converter()._convert_text(
                "Hello world.", Path("out.mp3"), time.time(), chapter=(2, 5))
        self.assertTrue(ok)
        out = buf.getvalue()
        self.assertIn("Processing 1 chunks via audio.cpp server", out)
        self.assertNotIn("single request", out)
        self.assertIn("Chapter 2/5 converted (1/1 chunks)", out)

    def test_partial_chunks_abort_without_assembling(self):
        converter = self._converter()
        converter.tts.process_chunk_with_retry.side_effect = ["chunk_0001.wav", None]
        text = " ".join(f"word{i}" for i in range(8))
        with patch.object(config, "CHUNK_SIZE", 5), \
                patch.object(converter_mod.audio, "combine_chunks") as mock_combine:
            ok = converter._convert_text(text, Path("out.mp3"), time.time())
        self.assertFalse(ok)
        mock_combine.assert_not_called()


class PromptOverwriteTests(unittest.TestCase):
    def test_single_file_yes(self):
        with patch("builtins.input", return_value="y"):
            self.assertTrue(prompt_overwrite([Path("dune.mp3")], "dune"))

    def test_single_file_no(self):
        with patch("builtins.input", return_value="n"):
            self.assertFalse(prompt_overwrite([Path("dune.mp3")], "dune"))

    def test_accepts_full_words(self):
        with patch("builtins.input", return_value="yes"):
            self.assertTrue(prompt_overwrite([Path("dune.mp3")], "dune"))
        with patch("builtins.input", return_value="No"):
            self.assertFalse(prompt_overwrite([Path("dune.mp3")], "dune"))

    def test_invalid_answer_reasked(self):
        with patch("builtins.input", side_effect=["maybe", "n"]) as mock_input:
            self.assertFalse(prompt_overwrite([Path("dune.mp3")], "dune"))
        self.assertEqual(mock_input.call_count, 2)

    def test_empty_answer_defaults_yes(self):
        # Pressing Enter (empty input) accepts the default of yes, matching
        # the make_audiocpp_server_json tool's ask_bool(default=True) prompt.
        with patch("builtins.input", return_value=""):
            self.assertTrue(prompt_overwrite([Path("dune.mp3")], "dune"))

    def test_eof_keeps_existing_output(self):
        with patch("builtins.input", side_effect=EOFError):
            self.assertFalse(prompt_overwrite([Path("dune.mp3")], "dune"))

    def test_multiple_files_prompt_names_them(self):
        files = [Path("dune_01_Dune.mp3"), Path("dune_02_Barony.mp3")]
        with patch("builtins.input", return_value="y") as mock_input:
            self.assertTrue(prompt_overwrite(files, "dune"))
        prompt_text = mock_input.call_args[0][0]
        self.assertIn("2 output files for 'dune'", prompt_text)
        self.assertIn("dune_01_Dune.mp3", prompt_text)
        self.assertIn("overwrite them", prompt_text)


class PreflightOverwritesTests(unittest.TestCase):
    """The pre-flight overwrite check runs without a TTS server connection."""

    def setUp(self):
        self._books_tmp = tempfile.TemporaryDirectory()
        self._output_tmp = tempfile.TemporaryDirectory()
        self._original_folders = (converter_mod.BOOKS_FOLDER, converter_mod.AUDIOBOOKS_FOLDER)
        converter_mod.BOOKS_FOLDER = Path(self._books_tmp.name)
        converter_mod.AUDIOBOOKS_FOLDER = Path(self._output_tmp.name)
        (converter_mod.BOOKS_FOLDER / "book.txt").write_text("hello world", encoding="utf-8")

    def tearDown(self):
        converter_mod.BOOKS_FOLDER, converter_mod.AUDIOBOOKS_FOLDER = self._original_folders
        self._books_tmp.cleanup()
        self._output_tmp.cleanup()

    def test_no_books_returns_empty(self):
        (converter_mod.BOOKS_FOLDER / "book.txt").unlink()
        with patch("builtins.input", side_effect=AssertionError("should not prompt")):
            book_files, planned = AudiobookConverter.preflight_overwrites(
                BACKEND_QWEN, None, VOICE_MODE_CUSTOM, None, "mp3")
        self.assertEqual(book_files, [])
        self.assertEqual(planned, [])

    def test_new_book_planned_without_prompt(self):
        with patch("builtins.input", side_effect=AssertionError("should not prompt")):
            book_files, planned = AudiobookConverter.preflight_overwrites(
                BACKEND_QWEN, None, VOICE_MODE_CUSTOM, None, "mp3")
        self.assertEqual(len(book_files), 1)
        self.assertEqual(planned, [(book_files[0], "book_Vivian")])

    def test_existing_output_enter_defaults_yes(self):
        (converter_mod.AUDIOBOOKS_FOLDER / "book_Vivian.mp3").write_bytes(b"existing")
        with patch("builtins.input", return_value=""):
            book_files, planned = AudiobookConverter.preflight_overwrites(
                BACKEND_QWEN, None, VOICE_MODE_CUSTOM, None, "mp3")
        self.assertEqual(planned, [(book_files[0], "book_Vivian")])

    def test_existing_output_declined_is_skipped(self):
        (converter_mod.AUDIOBOOKS_FOLDER / "book_Vivian.mp3").write_bytes(b"existing")
        with patch("builtins.input", return_value="n"):
            book_files, planned = AudiobookConverter.preflight_overwrites(
                BACKEND_QWEN, None, VOICE_MODE_CUSTOM, None, "mp3")
        self.assertEqual(len(book_files), 1)
        self.assertEqual(planned, [])


class RunOverwritePromptTests(unittest.TestCase):
    """The full run() flow: prompts collected before any conversion starts."""

    def setUp(self):
        self._books_tmp = tempfile.TemporaryDirectory()
        self._output_tmp = tempfile.TemporaryDirectory()
        self._original_folders = (converter_mod.BOOKS_FOLDER, converter_mod.AUDIOBOOKS_FOLDER)
        converter_mod.BOOKS_FOLDER = Path(self._books_tmp.name)
        converter_mod.AUDIOBOOKS_FOLDER = Path(self._output_tmp.name)
        (converter_mod.BOOKS_FOLDER / "book.txt").write_text("hello world", encoding="utf-8")
        self.converter = AudiobookConverter.__new__(AudiobookConverter)
        self.converter.voice_mode = VOICE_MODE_CUSTOM
        self.converter.voice_clone_ref_audio = None
        self.converter.backend = BACKEND_QWEN
        self.converter.voice = None
        self.converter.instructions = None
        self.converter.speed = 1.0
        self.converter.single_file = False
        self.converter.output_format = "mp3"
        self.converter.language = "English"
        self.converter.debug = False
        self.converted = []
        self.converter.convert_book = (
            lambda file_path, output_name=None:
            not self.converted.append((file_path.name, output_name)) or True)

    def tearDown(self):
        converter_mod.BOOKS_FOLDER, converter_mod.AUDIOBOOKS_FOLDER = self._original_folders
        self._books_tmp.cleanup()
        self._output_tmp.cleanup()

    def test_declined_book_is_skipped(self):
        (converter_mod.AUDIOBOOKS_FOLDER / "book_Vivian.mp3").write_bytes(b"existing")
        with patch("builtins.input", return_value="n"):
            self.assertTrue(self.converter.run())
        self.assertEqual(self.converted, [])
        self.assertTrue((converter_mod.AUDIOBOOKS_FOLDER / "book_Vivian.mp3").exists())

    def test_accepted_book_is_converted(self):
        (converter_mod.AUDIOBOOKS_FOLDER / "book_Vivian.mp3").write_bytes(b"existing")
        with patch("builtins.input", return_value="y"):
            self.assertTrue(self.converter.run())
        self.assertEqual(self.converted, [("book.txt", "book_Vivian")])

    def test_new_book_converted_without_prompt(self):
        with patch("builtins.input", side_effect=AssertionError("should not prompt")):
            self.assertTrue(self.converter.run())
        self.assertEqual(self.converted, [("book.txt", "book_Vivian")])


if __name__ == "__main__":
    unittest.main()