HarmonyOS 自定义interface回调问题

// Test.ets 
// ... 
aboutToAppear(): void { 
 
  let cb: ChAesCallBack = { 
    aesSuccess: (result: string): void => { 
      console.log(result) 
      // ... 
    }, 
    aesFail: (err: Resource): void => { 
      console.log(JSON.stringify(err)); 
      // ... 
    } 
  } 
 
  Test.aesDecrypt('message',cb) 
  Test.aesDecrypt('测试',cb) 
} 
 
// InterfaceTest.ets 
export interface ChAesCallBack { 
 
  //返回解密后的文本 
  aesSuccess: (result: string)=>void 
 
  //解密失败 
  aesFail: (err: Resource)=>void 
} 
 
export class Test{ 
  static aesDecrypt(message: string, callback: ChAesCallBack) { 
    if (message === "测试") { 
      callback.aesSuccess("成功") 
    }else { 
      callback.aesSuccess("失败") 
    } 
  } 
}