在硒Webdriver中使用Promise

Question

I'm using webdriverJS to do some automated testing in chrome.

I'm currently waiting for an element to be displayed on a webpage before clicking it, although the issue I'm having is the element takes a few seconds to display before being clickable, so I need the driver to sleep for a few seconds before clicking the element. I was wondering how I could use promises with webdriverJS to achieve this.

return driver.wait(until.elementLocated(By.className('elementName')), 5000)
.then(element => {
  driver.sleep(2000);
  element.click();
});

Since javascript is asynchronous the element is trying to be clicked before the sleep so I was wondering how I can incorporate promises in webdriverJS so that the click only happens after the sleep has finished.

Answer 1

According to the webdriver documentation , the sleep method returns a promise which is resolved when the time is reached.

You can handle the asynchronous part with this code :

let element
return driver.wait(until.elementLocated(By.className('elementName')), 5000)
 .then(_element => { 
   element = _element
   return driver.sleep(2000)
  })
 .then(() => element.click())

With the async/await feature :

const func = async driver => {
  const element = await driver.wait(until.elementLocated(By.className('elementName')), 5000)
  await driver.sleep(2000)
  element.click()
}