How to check if an alert exists using WebDriver?

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I need to check the existence of Alert in WebDriver.

Sometimes it pops up an alert but sometimes it will not pop up. I need to check if the alert exists first, then I can accept or dismiss it or it will say: no alert found.

public boolean isAlertPresent() 
{ 
    try 
    { 
        driver.switchTo().alert(); 
        return true; 
    }   // try 
    catch (NoAlertPresentException Ex) 
    { 
        return false; 
    }   // catch 
}   // isAlertPresent()

check the link here https://groups.google.com/forum/?fromgroups#!topic/webdriver/1GaSXFK76zY

selenium - How to check if an alert exists using WebDriver?, Sometimes it pops up an alert but sometimes it will not pop up. I need to check if the alert exists first, then I can accept or dismiss it or it will say: no alert found. I need to check the existence of Alert in WebDriver. Sometimes it pops up an alert but sometimes it will not pop up. I need to check if the alert exists first, then I can accept or dismiss it or it will say: no alert found.

The following (C# implementation, but similar in Java) allows you to determine if there is an alert without exceptions and without creating the WebDriverWait object.

boolean isDialogPresent(WebDriver driver) {
    IAlert alert = ExpectedConditions.AlertIsPresent().Invoke(driver);
    return (alert != null);
}

Check if any alert exists using selenium with python, In java, we do it like this. WebDriverWait wait = new WebDriverWait(driver, 7000);​. wait.until(ExpectedConditions.alertIsPresent());. driver. Check if an element exists using WebDriver Dwarika Dhish Mishra 8 comments IF you are a Selenium WebDriver Automation tester than most probably you would have gone through this situation, In which you have faced one exception that speaks “ Element not found “.

I would suggest to use ExpectedConditions and alertIsPresent(). ExpectedConditions is a wrapper class that implements useful conditions defined in ExpectedCondition interface.

WebDriverWait wait = new WebDriverWait(driver, 300 /*timeout in seconds*/);
if(wait.until(ExpectedConditions.alertIsPresent())==null)
    System.out.println("alert was not present");
else
    System.out.println("alert was present");

How to Check if any alert exists in selenium using Python, I'm not sure if the alert is a JavaScript alert or a webelement of the page itself. I want to automatically check the existence of the alert, because  driver.switchTo().alert().accept(); It will wait for an alert if an alert is not present, implicitly and it will throw ' Alert is not present Exception ' which can be caught by us and we can move ahead. I hope it helps.

I found catching exception of driver.switchTo().alert(); is so slow in Firefox (FF V20 & selenium-java-2.32.0).`

So I choose another way:

    private static boolean isDialogPresent(WebDriver driver) {
        try {
            driver.getTitle();
            return false;
        } catch (UnhandledAlertException e) {
            // Modal dialog showed
            return true;
        }
    }

And it's a better way when most of your test cases is NO dialog present (throwing exception is expensive).

Selenium Webdriver: How to check if alert pop up exists in selenium , You can use below code to check if Alert pop up (Modal Dialog) is open on the web page or not. try { driver.switchTo().alert(); // Alert exists and  Here, we can add a role for users and in case a role is already existing, then an alert araises. I'm not sure if the alert is a JavaScript alert or a webelement of the page itself. I want to automatically check the existence of the alert, because checking for the role from the entirety of the list is a waste of time and has an enormous load.

I would suggest to use ExpectedConditions and alertIsPresent(). ExpectedConditions is a wrapper class that implements useful conditions defined in ExpectedCondition interface.

public boolean isAlertPresent(){
    boolean foundAlert = false;
    WebDriverWait wait = new WebDriverWait(driver, 0 /*timeout in seconds*/);
    try {
        wait.until(ExpectedConditions.alertIsPresent());
        foundAlert = true;
    } catch (TimeoutException eTO) {
        foundAlert = false;
    }
    return foundAlert;
}

Note: this is based on the answer by nilesh, but adapted to catch the TimeoutException which is thrown by the wait.until() method.

Check an alert is present selenium webdriver, switchTo().alert(); return true; }// try catch (Exception e) { return false; }// catch } Check an alert is present selenium webdriver. if (isAlertPresents()) { accept an alert without waiting or checking alertisPresent()In "Selenium". How to verify a success message using selenium webdriver? and you can see how readable that is - essentially " institutions feedback 'deleted' " exists, with no

Check if any alert exists using selenium with python, Check if any alert exists using selenium with python. I'm trying to write a test with selenium in python language for a web page that manages users. In this page  I'm trying to check whether the popup window I want to open is opened or not. I have checked some question answers like . How would you check if a popup window exists using selenium webdriver? But, nothings helped to solve the problem. Here, first I open the login window by clicking the login button.

WebDriver: Verify If JavaScript Alert is Present or Not, shows how to verify if java script alert box is present or not using webdriver (​selenium) API. WebDriverWait wait3 = new WebDriverWait(driver, 7000); wait3.until(ExpectedConditions.alertIsPresent()); driver.switchTo().alert().accept(); It will implicitly wait for alert if alert is not present it will throw 'Alert is not present Exceptio' which we can catch and move ahead. Hope it helps.

Verify if an alert is present or not., I'm using C# with webdriver 2.20. I can add the Alert.dismiss but the issue is that I got the expected exception " No alert is present" when the  Using WebDriver. To get started using WebDriver with Microsoft Edge (EdgeHTML), check out these samples: C# code sample for opening a browser window, navigating to bing.com and searching for 'webdriver' (GitHub Gist). WebDriver server command line flags. List of command line flags for the WebDriver server.

Comments
  • In the link you can see hos to accept or dismiss the alert window
  • The slightly wrong answer below and the one on stackoverflow.com/questions/8244723/… are a much better way to do that. The try/catch model, as well as being clunky, logs a message about there not being an alert.
  • ExpectedConditions.alertIsPresent() gives you exactly the same thing, but in a nicer way and in just one line :)
  • ExpectedConditions doesn't save much more code then the simple try catch.
  • One issue with this approach is that while checking to see if the alert exists, the context has been switched to the alert. This might be problematic if you aren't expecting it.
  • add a ".apply(driver)" after the "alertIsPresent()" or do it properly and use wait
  • I find that this throws a TimeoutException.
  • TimeoutException when expected condition was not met in given timeout. Was Alert present at all?
  • @nilesh links are broken
  • When I call a C# implementation of your function, it throws the exception, but it also closes the alert.
  • despite that it also closes the alert, so far I found that this approach is fastest when dealing with alert detection, even faster than ExpectedConditions.alertIsPresent
  • The main problem with this approach is it eating the alert. When alert is not there driver.switchTo().alert() it taking around 6-10 ms in FF 62
  • Another note: In C#, this is the WebDriverTimeoutException. I suppose that is because there is a System.TimeoutException class that could have easily gotten mixed up with that.
  • Add some more detailed description.