CODEWITHSUNDEEP
javaseleniumselenium-webdriverwaitpredicate
Steve Chambers
Steve Chambers

Reputation: 39464

How to make Selenium wait until an element is present?

I'm trying to make Selenium wait for an element that is dynamically added to the DOM after page load. I tried this:

fluentWait.until(ExpectedConditions.presenceOfElement(By.id("elementId"));

In case it helps, here is fluentWait:

FluentWait fluentWait = new FluentWait<>(webDriver) {
    .withTimeout(30, TimeUnit.SECONDS)
    .pollingEvery(200, TimeUnit.MILLISECONDS);
}

But it throws a NoSuchElementException. It looks like presenceOfElement expects the element to be there, so this is flawed. This must be bread and butter to Selenium, and I don't want to reinvent the wheel... Is there an alternative, ideally without rolling my own Predicate?

Upvotes: 65

Views: 280368

Answers (5)

Petr Mensik
Petr Mensik

Reputation: 27536

You need to call ignoring with an exception to ignore while the WebDriver will wait.

FluentWait<WebDriver> fluentWait = new FluentWait<>(driver)
        .withTimeout(30, TimeUnit.SECONDS)
        .pollingEvery(200, TimeUnit.MILLISECONDS)
        .ignoring(NoSuchElementException.class);

See the documentation of FluentWait for more information. But beware that this condition is already implemented in ExpectedConditions, so you should use:

WebElement element = (new WebDriverWait(driver, 10))
   .until(ExpectedConditions.elementToBeClickable(By.id("someid")));

*Fewer versions of Selenium:

withTimeout(long, TimeUnit) has become withTimeout(Duration)
pollingEvery(long, TimeUnit) has become pollingEvery(Duration)

So the code will look as such:

FluentWait<WebDriver> fluentWait = new FluentWait<>(driver)
        .withTimeout(Duration.ofSeconds(30)
        .pollingEvery(Duration.ofMillis(200)
        .ignoring(NoSuchElementException.class);

A basic tutorial for waiting can be found here.

Upvotes: 84

bhupendra
bhupendra

Reputation: 191

Use:

WebDriverWait wait = new WebDriverWait(driver, 5)
wait.until(ExpectedConditions.visibilityOf(element));

You can use this as some time before loading the whole page, the code gets executed and throws an error. The time is in seconds.

Upvotes: 16

palandlom
palandlom

Reputation: 547

FluentWait throws a NoSuchElementException is case of the confusion

org.openqa.selenium.NoSuchElementException;

with

java.util.NoSuchElementException

in 

.ignoring(NoSuchElementException.class)

Upvotes: 0

Ashwini
Ashwini

Reputation: 129

public WebElement fluientWaitforElement(WebElement element, int timoutSec, int pollingSec) {

    FluentWait<WebDriver> fWait = new FluentWait<WebDriver>(driver).withTimeout(timoutSec, TimeUnit.SECONDS)
        .pollingEvery(pollingSec, TimeUnit.SECONDS)
        .ignoring(NoSuchElementException.class, TimeoutException.class).ignoring(StaleElementReferenceException.class);

    for (int i = 0; i < 2; i++) {
        try {
            //fWait.until(ExpectedConditions.invisibilityOfElementLocated(By.xpath("//*[@id='reportmanager-wrapper']/div[1]/div[2]/ul/li/span[3]/i[@data-original--title='We are processing through trillions of data events, this insight may take more than 15 minutes to complete.']")));
        fWait.until(ExpectedConditions.visibilityOf(element));
        fWait.until(ExpectedConditions.elementToBeClickable(element));
        } catch (Exception e) {

        System.out.println("Element Not found trying again - " + element.toString().substring(70));
        e.printStackTrace();

        }
    }

    return element;

    }

Upvotes: 0

Andrei Solntsev
Andrei Solntsev

Reputation: 510

Let me recommend you using Selenide library. It allows writing much more concise and readable tests. It can wait for presence of elements with much shorter syntax:

$("#elementId").shouldBe(visible);

Here is a sample project for testing Google search: https://github.com/selenide-examples/google

Upvotes: 3

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