如何对异步方法进行插桩/替换

class Test { 
  static data: string = "initData"; 
  static async printData(arg: string) {  // 异步方法 
    console.log("execute original printData"); 
    console.log("Test.data is" + Test.data); 
    console.log(arg); 
    return 0; 
  } 
} 
// 插桩 
util.Aspect.addBefore(Test, "printData", true, 
  (classObj: Object, arg: string): void => { 
    console.log("execute before"); 
    Reflect.set(classObj, "data", "dataChangedByBefore"); 
    console.log("arg is " + arg); 
  } 
); 
 
Test.printData("m1").then((res) => { 
  console.log("res = " + res.toString()); 
  console.log("Test.data = " + Test.data); 
});
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class Test { 
  static data: string = "initData"; 
  static async printData(arg: string) {  // 异步方法 
    console.log("execute original printData"); 
    console.log("Test.data is" + Test.data); 
    console.log(arg); 
    return 0; 
  } 
} 
// 插桩 
util.Aspect.replace(Test, "printData", true, 
  // 替换成另外一个异步函数 
  async (classObj: Object, arg: string): Promise<number> => { 
    console.log("execute instead"); 
    Reflect.set(classObj, "data", "dataChangedByInstead"); 
    console.log("arg is " + arg); 
    return Promise.resolve(100); 
  }); 
 
Test.printData("m1").then((res) => { 
  console.log("res = " + res.toString()); 
  console.log("Test.data = " + Test.data); 
});
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