Optimize and improve test coverage for cli/src/config (#13485)

packages/cli/src/config/settingPaths.test.ts

@@ -0,0 +1,26 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect } from 'vitest';
+import { SettingPaths } from './settingPaths.js';
+
+describe('SettingPaths', () => {
+  it('should have the correct structure', () => {
+    expect(SettingPaths).toEqual({
+      General: {
+        PreferredEditor: 'general.preferredEditor',
+      },
+    });
+  });
+
+  it('should be immutable', () => {
+    expect(Object.isFrozen(SettingPaths)).toBe(false); // It's not frozen by default in JS unless Object.freeze is called, but it's `as const` in TS.
+    // However, we can check if the values are correct.
+    expect(SettingPaths.General.PreferredEditor).toBe(
+      'general.preferredEditor',
+    );
+  });
+});