Add title menu flow

tools/smoke_title_menu.gd

@@ -0,0 +1,112 @@
+extends SceneTree
+
+const BattleSceneScript := preload("res://scripts/scenes/battle_scene.gd")
+
+const SAVE_PATH := "user://campaign_save.json"
+const MANUAL_SAVE_PATH := "user://campaign_manual_save.json"
+
+
+func _init() -> void:
+	var save_backup := _backup_user_file(SAVE_PATH)
+	var manual_backup := _backup_user_file(MANUAL_SAVE_PATH)
+	var failures: Array[String] = []
+	_clear_user_file(SAVE_PATH)
+	_clear_user_file(MANUAL_SAVE_PATH)
+
+	_check_title_menu_start_load_and_settings(failures)
+
+	if not _restore_user_file(SAVE_PATH, save_backup):
+		failures.append("could not restore campaign save after title menu smoke")
+	if not _restore_user_file(MANUAL_SAVE_PATH, manual_backup):
+		failures.append("could not restore manual campaign save after title menu smoke")
+
+	if failures.is_empty():
+		print("title menu smoke ok")
+		quit(0)
+		return
+
+	for failure in failures:
+		push_error(failure)
+	quit(1)
+
+
+func _check_title_menu_start_load_and_settings(failures: Array[String]) -> void:
+	var scene = BattleSceneScript.new()
+	scene._ready()
+
+	if scene.title_screen_root == null or not scene.title_screen_root.visible:
+		failures.append("title screen should be visible on startup")
+	if scene.briefing_panel == null or scene.briefing_panel.visible:
+		failures.append("briefing should stay hidden behind the title screen")
+	if scene.title_start_button == null or scene.title_start_button.text != "처음부터 시작":
+		failures.append("title screen should expose Start from Beginning")
+	if scene.title_load_button == null or scene.title_load_button.text != "게임 로드":
+		failures.append("title screen should expose Game Load")
+	elif not scene.title_load_button.disabled:
+		failures.append("Game Load should be disabled when no save exists")
+	if scene.title_settings_button == null or scene.title_settings_button.text != "환경 설정":
+		failures.append("title screen should expose Settings")
+
+	scene._on_title_settings_pressed()
+	if scene.title_settings_panel == null or not scene.title_settings_panel.visible:
+		failures.append("title settings panel should open from the title screen")
+	if scene.title_bgm_toggle == null or scene.title_sfx_toggle == null or scene.title_edge_scroll_toggle == null:
+		failures.append("title settings should expose BGM, SFX, and edge-scroll toggles")
+	scene._on_title_bgm_toggled(false)
+	if scene.title_bgm_enabled:
+		failures.append("BGM toggle should disable background music")
+	scene._on_title_sfx_toggled(false)
+	if scene.title_sfx_enabled:
+		failures.append("SFX toggle should disable sound effects")
+	scene._on_title_edge_scroll_toggled(false)
+	if scene.title_edge_scroll_enabled:
+		failures.append("edge-scroll toggle should disable edge scrolling")
+	if scene._update_edge_scroll(0.25):
+		failures.append("edge scrolling should not move while disabled in settings")
+	scene._on_title_settings_back_pressed()
+	if scene.title_settings_panel != null and scene.title_settings_panel.visible:
+		failures.append("settings back should hide the title settings panel")
+
+	scene._on_title_start_pressed()
+	if scene.title_screen_root != null and scene.title_screen_root.visible:
+		failures.append("starting a new game should hide the title screen")
+	if scene.briefing_panel == null or not scene.briefing_panel.visible:
+		failures.append("starting a new game should enter the first briefing")
+	if not scene.campaign_state.has_save():
+		failures.append("starting a new game should create the main campaign save")
+
+	scene._show_title_menu()
+	scene._update_title_menu_state()
+	if scene.title_load_button == null or scene.title_load_button.disabled:
+		failures.append("Game Load should become available after a campaign save exists")
+	scene._on_title_load_pressed()
+	if scene.title_screen_root != null and scene.title_screen_root.visible:
+		failures.append("loading a saved game should hide the title screen")
+	if scene.briefing_panel == null or not scene.briefing_panel.visible:
+		failures.append("loading a saved game should enter the current campaign briefing")
+	scene.free()
+
+
+func _backup_user_file(path: String) -> Dictionary:
+	if not FileAccess.file_exists(path):
+		return {"exists": false, "text": ""}
+	return {
+		"exists": true,
+		"text": FileAccess.get_file_as_string(path)
+	}
+
+
+func _restore_user_file(path: String, backup: Dictionary) -> bool:
+	if bool(backup.get("exists", false)):
+		var file := FileAccess.open(path, FileAccess.WRITE)
+		if file == null:
+			return false
+		file.store_string(str(backup.get("text", "")))
+		return true
+	return _clear_user_file(path)
+
+
+func _clear_user_file(path: String) -> bool:
+	if not FileAccess.file_exists(path):
+		return true
+	return DirAccess.remove_absolute(ProjectSettings.globalize_path(path)) == OK