import 'dart:developer';

import 'package:logging/logging.dart';

final _logging = Logger("dartTest");




void main() {
  Logger.root.level = Level.ALL; // defaults to Level.INFO
  Logger.root.onRecord.listen((record) {
    print('${record.level.name}: ${record.time}: ${record.message}');
  });
  
  Future.delayed(const Duration(seconds: 3), ()=> "future test")
    .then((value) => _logging.info(value));

  // Future.delayed(const Duration(seconds: 2), () {
  //   //return "hi world!";
  //   throw AssertionError("Error");
  // }).then((data) {
  //   //执行成功会走到这里
  //   print("success");
  // }).catchError((e) {
  //   //执行失败会走到这里
  //   print(e);
  // });
  
}