等待条件失败后量角器重试函数

Question

我正在尝试修复一些不稳定的测试。 量角器：5.3.2 角 6

这就是我想要做的：

1. 加载页面（数据应从数据库加载）
2. 等到满足条件：数据已加载，加载微调器不可见
3. 如果不满足条件重试，重新加载页面

这是我的代码：

  async navigate(): Promise<void> {
    return await browser.get('/', 10000).then(async () => {
      return await this.waitForDataToLoad(10000);
    });
  }

  async waitForDataToLoad(timeOut?: number): Promise<any> {
    let isSpinnerInVisible = ExpectedConditions.invisibilityOf(element(By.css("spinner")));
    let isWorkflowLoaded = ExpectedConditions.visibilityOf(element(By.css("employee-list ul li:first-child a")));
    return browser.wait( ExpectedConditions.and(isSpinnerInVisible, isWorkflowLoaded), timeOut, 'data was not loaded in the given timeout');
  }

我有几个问题：

1 - 我的自定义超时错误消息永远不会在控制台中打印，它只会将默认错误打印为： - Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL

2- 我尝试如下添加重试功能，但似乎不起作用：

 async navigate(): Promise<void> {
    return await browser.get('/', 10000).then(async () => {
      return await this.waitForDataToLoad(10000);
    }, (err) => {
      console.log('Data was not loaded:', err.message);
      this.navigate(); // Re try 
    });
  } 

知道如何实现这一目标吗？我知道有 Protractor flake 和 Retry npm 包，但它们并不是我所需要的。

Answer 1

我将我的问题解决为：

  navigate(): promise.Promise<any> {
return browser.get('/').then(async () => {
  let waitForCondition = this.waitForDataToLoad(10000)
    .then((found) => {
      return Promise.resolve(found);
    })
    .catch((error) => {
      if (this.retryAttempts < 4) {
        console.log(`Retrying navigate, attempt: ${this.retryAttempts}.`);
        this.navigate();
      } else {
        console.log('Rejecting the promise after 3 attempts.');
        return Promise.reject(error);
      }
    });;
  this.retryAttempts++;
  return waitForCondition;
});

}

waitForDataToLoad(timeOut?: number): promise.Promise<{}> {
    let isSpinnerInVisible =  let isSpinnerInVisible = ExpectedConditions.invisibilityOf(element(By.css("spinner")));
    let isWorkflowLoaded = ExpectedConditions.visibilityOf(element(By.css("employee-list ul li:first-child a")));

    return browser.wait(ExpectedConditions.and(isSpinnerInVisible, isWorkflowLoaded), timeOut)
  }