feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

frontend/packages/arch/bot-flags/__tests__/persist-cache.test.ts

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+import { logger } from '@coze-arch/logger';
+
+import { readFromCache, saveToCache } from '../src/utils/persist-cache'; // Adjust the import path
+
+// Mocking localStorage
+const localStorageMock = {
+  getItem: vi.fn(),
+  setItem: vi.fn(),
+};
+
+vi.stubGlobal('localStorage', localStorageMock);
+
+describe('Feature Flags Cache', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  describe('readFromCache', () => {
+    it('should return undefined if cache is empty', async () => {
+      localStorageMock.getItem.mockReturnValueOnce(undefined);
+      const result = await readFromCache();
+      expect(result).toBeUndefined();
+    });
+
+    it('should return feature flags if cache has valid data', async () => {
+      const validFlags = { feature1: true, feature2: false };
+      localStorageMock.getItem.mockReturnValueOnce(JSON.stringify(validFlags));
+      const result = await readFromCache();
+      expect(result).toEqual(validFlags);
+    });
+
+    it('should return undefined if cache has invalid data', async () => {
+      localStorageMock.getItem.mockReturnValueOnce(
+        JSON.stringify({ invalid: 'data' }),
+      );
+      const result = await readFromCache();
+      expect(result).toBeUndefined();
+    });
+  });
+
+  describe('saveToCache', () => {
+    it('should save feature flags to cache', async () => {
+      const flags = { feature1: true, feature2: false };
+      await saveToCache(flags);
+      expect(localStorageMock.setItem).toBeCalledWith(
+        'cache:@coze-arch/bot-flags',
+        JSON.stringify(flags),
+      );
+    });
+
+    it('should save feature flags to cache', async () => {
+      await saveToCache({ fg: 'test' });
+      expect(localStorageMock.setItem).not.toBeCalled();
+    });
+
+    it('should save feature flags to cache', async () => {
+      localStorageMock.setItem.mockImplementation(() => {
+        throw new Error('test');
+      });
+      await saveToCache({ feature: true });
+      expect(logger.persist.error).toBeCalled();
+    });
+  });
+});