feat: prompt for overwrites before connecting to TTS server

1 files changed, 55 insertions, 2 deletions

diff --git a/tests/test_converter.py b/tests/test_converter.py
index 5ef9785..8402b30 100644
--- a/tests/test_converter.py
+++ b/tests/test_converter.py
@@ -358,9 +358,15 @@ class PromptOverwriteTests(unittest.TestCase):
             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:
+        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, 3)
+        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):
@@ -376,6 +382,53 @@ class PromptOverwriteTests(unittest.TestCase):
         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(
+                tts.BACKEND_GRADIO, None, tts.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(
+                tts.BACKEND_GRADIO, None, tts.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(
+                tts.BACKEND_GRADIO, None, tts.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(
+                tts.BACKEND_GRADIO, None, tts.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."""