Selenium Framework Design in Data-Driven Testing

Multithreading support for parallel and distributed testing

In order to leverage the TestNG parallel testing features, users must create a separate thread for each driver instance to control event processing requests. This is done in Java using the ThreadLocal<T> class. By declaring variables with this class, each thread has its own initialized copy of the variable, and can return specifics of that session. The following variables are declared in the singleton driver class, and have getter and setter methods to retrieve the session ID, browser, platform, and version:

private ThreadLocal<WebDriver> webDriver = new ThreadLocal<WebDriver>();private ThreadLocal<AppiumDriver<MobileElement>> mobileDriver = new ThreadLocal<AppiumDriver<MobileElement>>(); ...