// Copyright (c) 2018, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

// This has been automatically generated by script
// "async_nested_test_generator.dart".

import 'dart:async';

void main() async {
  String expected = "1 2 3 4 5 6 7 8 9 10 11 12";
  Node node = await new Future.value(new Node('1', [
    await new Future.value(new Node('2', [])),
    await new Future.value(new Node('3', [
      await new Future.value(new Node('4', [])),
      await new Future.value(new Node('5', [])),
      await new Future.value(new Node('6', [])),
    ])),
    new Node('7', []),
    new Node('8', [
      new Node('9', []),
      await new Future.value(new Node('10', [])),
      new Node('11', []),
      await new Future.value(new Node('12', [])),
    ]),
  ]));
  String actual = node.toSimpleString();
  print(actual);
  if (actual != expected) {
    throw "Expected '$expected' but got '$actual'";
  }
}

class Node {
  final List<Node> nested;
  final String name;

  Node(this.name, [this.nested]) {}

  String toString() => '<$name:[${nested?.join(', ')}]>';

  toSimpleString() {
    var tmp = nested?.map((child) => child.toSimpleString());
    return '$name ${tmp?.join(' ')}'.trim();
  }
}