To work with Basic Authentication pop-up (which is a browser dialogue window), you just need to send the user name and password along with the application URL.
#1 (Chrome & Firefox)
By passing user credentials in URL. Its simple, append your username and password with the URL.
e.g., http://Username:Password@SiteURL
http://rajkumar:myPassword@www.softwaretestingmaterial.com
#2 (IE)
First create AutoIt script as below and save it as basicauth.au3
To pass user name and password
WinWaitActive(“Windows Security”)
Send(“admin”)
Send(“{TAB}”)
Send(“admin”)
Send(“{ENTER}”)
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try {
Runtime.getRuntime().exec(“G:/basicauth.exe”);
} catch (Exception e) {
e.printStackTrace();
}