Add persisted progress bar beep interval setting

tests/test_sound_preferences_regressions.py

@@ -0,0 +1,27 @@
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+from unittest import mock
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))
+
+from cthulhu import settings
+from cthulhu import settings_manager
+
+
+class SoundSettingsPersistenceTests(unittest.TestCase):
+    def test_progress_bar_beep_interval_is_user_customizable(self):
+        self.assertIn("progressBarBeepInterval", settings.userCustomizableSettings)
+
+    def test_activate_writes_progress_bar_beep_interval_default(self):
+        with tempfile.TemporaryDirectory() as tempDir:
+            manager = settings_manager.SettingsManager(mock.Mock())
+            manager.activate(prefsDir=tempDir)
+            settingsText = Path(tempDir, "user-settings.toml").read_text(encoding="utf-8")
+
+        self.assertIn("progressBarBeepInterval = 0", settingsText)
+
+
+if __name__ == "__main__":
+    unittest.main()