feat(plan): inject message when user manually exits Plan mode (#20203)

packages/core/src/utils/approvalModeUtils.test.ts

@@ -0,0 +1,60 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect } from 'vitest';
+import { ApprovalMode } from '../policy/types.js';
+import {
+  getApprovalModeDescription,
+  getPlanModeExitMessage,
+} from './approvalModeUtils.js';
+
+describe('approvalModeUtils', () => {
+  describe('getApprovalModeDescription', () => {
+    it('should return correct description for DEFAULT mode', () => {
+      expect(getApprovalModeDescription(ApprovalMode.DEFAULT)).toBe(
+        'Default mode (edits will require confirmation)',
+      );
+    });
+
+    it('should return correct description for AUTO_EDIT mode', () => {
+      expect(getApprovalModeDescription(ApprovalMode.AUTO_EDIT)).toBe(
+        'Auto-Edit mode (edits will be applied automatically)',
+      );
+    });
+
+    it('should return correct description for PLAN mode', () => {
+      expect(getApprovalModeDescription(ApprovalMode.PLAN)).toBe(
+        'Plan mode (read-only planning)',
+      );
+    });
+
+    it('should return correct description for YOLO mode', () => {
+      expect(getApprovalModeDescription(ApprovalMode.YOLO)).toBe(
+        'YOLO mode (all tool calls auto-approved)',
+      );
+    });
+  });
+
+  describe('getPlanModeExitMessage', () => {
+    it('should return standard message when not manual', () => {
+      expect(getPlanModeExitMessage(ApprovalMode.DEFAULT, false)).toBe(
+        'Plan approved. Switching to Default mode (edits will require confirmation).',
+      );
+    });
+
+    it('should return manual message when manual is true', () => {
+      expect(getPlanModeExitMessage(ApprovalMode.AUTO_EDIT, true)).toBe(
+        'User has manually exited Plan Mode. Switching to Auto-Edit mode (edits will be applied automatically).',
+      );
+    });
+
+    it('should default to non-manual message', () => {
+      expect(getPlanModeExitMessage(ApprovalMode.YOLO)).toBe(
+        'Plan approved. Switching to YOLO mode (all tool calls auto-approved).',
+      );
+    });
+  });
+});