How to get value from alert in Selenium?

What is alert class in Selenium?

I want to know, what is the meaning of alert class in Selenium?

It was first introduced in TestNG with which we can add tests. I know, it can remove the element from DOM, but, what is the purpose and use of the alert class.

I tried to Google search but did not get a satisfactory answer. Any help appreciated. The alert class can be used to interact with an alert message dialog. If you have a popup window or alert and want to test if that popup is closed/has the proper status/etc.

Which class implements alert interface in Selenium?

Suppose I have a project that is using Selenium for testing purposes, but now I'm asking myself whether Selenium implements alert interface, or I should use one of the following approaches: create my own alert interface and add it to Selenium instance.

But what if someone uses another approach of implementing alerts - by creating new elements.

Ask Selenium to provide me with some utility class or interface that does that. But the problem is that Selenium don't provide any interfaces that do that.

Which approach is better in terms of writing less test code? What's the best solution to check if Selenium actually supports a certain interface? You can create your own interface for alert handling. However Selenium provides a lot of useful classes that could be useful, like Thread, WebElement, and ElementLocator which are all pretty handy.

How to check presence of alert in Selenium?

I'm using Selenium in Python and trying to check the presence of an alert before proceeding.

I'm doing a sign in page and after the user signs in, the alert appears with a message saying "Congratulations".

Is there a way to check that the alert is there before continuing the test? I've tried using the existenceofelementlocated method but I keep getting false as a result. Any suggestions would be appreciated. Code: driver.get(url) try: driver.findelementbyid('txtEmail').sendkeys('email')
driver.findelementbyid('txtPassword').sendkeys('password')
driver.findelementbyid('btnSignIn').click()
print "Correct Email, Password and Sign In". time.sleep(10) driver.findelementbyid("txtError").text = "Sign In Sucessful"
Except: print "Wrong Email or Password, or Sign In not Sucessful". time.sleep(5) driver.findelementbyid("txtError").text = "Sign In Failed"
print "Error sign in". Yes, the best way to handle this is to use the expectedconditions property: alert = WebDriverWait(driver, 10).until(expectedconditions.alertispresent())