Testing 余烬测试：在呈现某些内容之前，如何暂停测试？

我正在尝试创建一个简单的测试来创建新记录

test('Create dataset', function(assert) {
  expect(1);
  visit('/add');

  fillIn('input.name', 'some name');
  fillIn('input.description', 'some description');


  //this part is to click on custom dropdown and select first option
  click('.select2-container input'); //after this action a list of options is generated
  click('.select2-drop ul li:first'); //but this action runs before the list was generated, so it gives me an error that this element does not exist

  click('button[type="submit"]');

});

有没有办法暂停测试直到列表呈现出来

例如，waitFor（'.select2-drop-ul-li:first'）

---

UPD：我发现select2在“body”中生成了下拉列表。余烬测试在div#Ember测试中运行。这就是为什么我的测试脚本看不到select2的内容。

要处理异步行为，请使用帮助程序

Ember.run.later（函数（）{//5秒后重试，5000）<代码>然后（（）=>单击（'.选择2 drop ul li:first'）应该可以做到这一点

test('Create dataset', function(assert) {
  expect(1);
  visit('/add');

  andThen(function() {
    fillIn('input.name', 'some name');
    fillIn('input.description', 'some description');


    //this part is to click on custom dropdown and select first option
    click('.select2-container input'); //after this action a list of options is generated
    click('.select2-drop ul li:first'); //but this action runs before the list was generated, so it gives me an error that this element does not exist

    click('button[type="submit"]');
  });

});