Wait for page load in Selenium

Question

How do you make Selenium 2.0 wait for the page to load?

Answer 1

Imran's answer rehashed for Java 7:

    WebDriverWait wait = new WebDriverWait(driver, 30);

    wait.until(new ExpectedCondition<Boolean>() {
        public Boolean apply(WebDriver wdriver) {
            return ((JavascriptExecutor) driver).executeScript(
                "return document.readyState"
            ).equals("complete");
        }
    });

Answer 2

NodeJS Solution:

In Nodejs you can get it via promises...

If you write this code, you can be sure that the page is fully loaded when you get to the then...

driver.get('www.sidanmor.com').then(()=> {
    // here the page is fully loaded!!!
    // do your stuff...
}).catch(console.log.bind(console));

If you write this code, you will navigate, and selenium will wait 3 seconds...

driver.get('www.sidanmor.com');
driver.sleep(3000);
// you can't be sure that the page is fully loaded!!!
// do your stuff... hope it will be OK...

From Selenium documentation:

this.get( url ) → Thenable

Schedules a command to navigate to the given URL.

Returns a promise that will be resolved when the document has finished loading.

Selenium Documentation (Nodejs)

Answer 3

If you want to wait for a specific element to load, you can use the isDisplayed() method on a RenderedWebElement :

// Sleep until the div we want is visible or 5 seconds is over
long end = System.currentTimeMillis() + 5000;
while (System.currentTimeMillis() < end) {
    // Browsers which render content (such as Firefox and IE) return "RenderedWebElements"
    RenderedWebElement resultsDiv = (RenderedWebElement) driver.findElement(By.className("gac_m"));

    // If results have been returned, the results are displayed in a drop down.
    if (resultsDiv.isDisplayed()) {
      break;
    }
}

(Example from The 5 Minute Getting Started Guide)

Answer 4

I'm surprised that predicates weren't the first choice as you typically know what element(s) you will next interact with on the page you're waiting to load. My approach has always been to build out predicates/functions like waitForElementByID(String id) and waitForElemetVisibleByClass(String className), etc. and then use and reuse these wherever I need them, be it for a page load or page content change I'm waiting on.

For example,

In my test class:

driverWait.until(textIsPresent("expectedText");

In my test class parent:

protected Predicate<WebDriver> textIsPresent(String text){
    final String t = text;
    return new Predicate<WebDriver>(){
        public boolean apply(WebDriver driver){
            return isTextPresent(t);
        }
    };
}

protected boolean isTextPresent(String text){
    return driver.getPageSource().contains(text);
}

Though this seems like a lot, it takes care of checking repeatedly for you and the interval for how often to check can be set along with the ultimate wait time before timing out. Also, you will reuse such methods.

In this example, the parent class defined and initiated the WebDriver driver and the WebDriverWait driverWait.

I hope this helps.

Answer 5

If someone uses selenide:

public static final Long SHORT_WAIT = 5000L; // 5 seconds
$("some_css_selector").waitUntil(Condition.appear, SHORT_WAIT);

More Conditions can be found here: http://selenide.org/javadoc/3.0/com/codeborne/selenide/Condition.html

Answer 6

Use class WebDriverWait

Also see here

You can expect to show some element. something like in C#:

WebDriver _driver = new WebDriver();
WebDriverWait _wait = new WebDriverWait(_driver, new TimeSpan(0, 1, 0));

_wait.Until(d => d.FindElement(By.Id("Id_Your_UIElement"));