Wait function and error handling using Selenium Webdriver

Question

I'm writing automated tests using Selenium WebDriver and Java that need lots of waits in them to make sure that the appropriate element has loaded before the next action is taken.

I've tried this:

driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);

which will wait for a specified interval and then fail if the element is not found, and this:

WebDriverWait wait = new WebDriverWait(driver, 100);
wait.until(new ExpectedCondition<Boolean>() {
  public Boolean apply(WebDriver webDriver) {
    System.out.println("Searching for the Companies dropdown");
    return webDriver.findElement(By.id("ctl00_PageContent_vpccompanies_Input")) != null;
  }
});

which will hang indefinitely if the element is not found.

What I'd like is something that would search for the element for a couple of tries and then fail with an error message.

Roman C · Accepted Answer · 2012-10-17 17:57:40Z

1

Wrap your code onto a cycle and loop until the find condition matched or extra condition that exits a loop. Use isElementPresent(element) to check that condition of find.

edited Oct 17, 2012 at 17:57

answered Oct 17, 2012 at 17:48

Roman C

1

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Comments

Yogendra Singh · Accepted Answer · 2012-10-17 18:00:18Z

0

I would say, put your element access code in a while loop, which breaks either on success or number of attempts.

e.g.(pseudo code)

    int numAttemps = 0;
    int specifiedAttempts = 5;
    boolean success = false;
    do{
       numAttemps++;
       try{
         //access the element
          WebElement element = driver.findElement(By.id(..));
          success  = true; //<--If it reaches here means success
       }catch(NoSuchElementException nse)
           //one attempt failed
       }
     }while(!success || numAttemps <specifiedAttempts);

     if(!success){
        System.out.println("Couldn't load after " +specifiedAttempts+ " attempts");
     }

edited Oct 17, 2012 at 18:00

answered Oct 17, 2012 at 17:47

Yogendra Singh

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1 Comment

zinoadidi Over a year ago

this doesnt help much in most cases. situation like slow response from server and etc; also, writting a loop to retry tasks is memory consuming

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