establish config defaults

tests/test_settings_default_config.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+import os
 from pathlib import Path
 
 from src.app.config.settings import Settings
@@ -18,6 +19,10 @@ def test_settings_creates_root_config_if_missing(tmp_path, monkeypatch):
 
     data = json.loads(cfg_path.read_text(encoding="utf-8"))
     assert "playlists" in data
+    assert data.get("ffmpeg_path") == ("./bin/ffmpeg.exe" if os.name == "nt" else "./bin/ffmpeg")
+    assert data["playlists"][0].get("download_mode") == "video"
+    assert data["playlists"][0].get("max_download_quality") == "1080p"
+    assert data["playlists"][0].get("save_path") == "./downloads"
 
 
 def test_settings_reads_config_from_default_location(tmp_path, monkeypatch):
@@ -25,8 +30,11 @@ def test_settings_reads_config_from_default_location(tmp_path, monkeypatch):
 
     cfg_path = tmp_path / "config" / "yt-playlist-config.json"
     cfg_path.parent.mkdir(parents=True, exist_ok=True)
-    cfg_path.write_text(json.dumps({"playlists": [{"url": "X", "save_path": "./downloads"}]}), encoding="utf-8")
+    cfg_path.write_text(json.dumps({"playlists": [{"url": "X"}]}), encoding="utf-8")
 
     settings = Settings()
     assert settings.path == cfg_path.resolve()
     assert settings.playlists and settings.playlists[0]["url"] == "X"
+    assert settings.playlists[0]["download_mode"] == "video"
+    assert settings.playlists[0]["max_download_quality"] == "1080p"
+    assert settings.playlists[0]["save_path"] == "./downloads"