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Nowadays, automation testers are shifting from selenium1 to selenium web driver because of its many advantages. I am new to automation and had used selenium1 earlier. I have recently started using selenium web driver and while automating my first test, I wanted to maximize my browser window but then I found out that web driver has no direct command of maximizing window like we have in selenium1.  Although we can use selenium commands in webdriver by using webbacked driver function. I used selenium.maximize() function but it was not working on my machine. I knew that it is not the only way of maximizing browser window. There could be other ways also. I have mentioned four different ways of maximizing browser window in selenium web driver in this blog . If in any case, one of them is not working for you then have other options which can be tried out.

1. The very first method which is given in their documentation is using windowMaximize() command of selenium instance.

selenium = new WebDriverBackedSelenium(driver,url);
selenium.windowMaximize();

2. We can use robot class to invoke keyboard action to maximize browser window. Robot class  is used to generate native system input events for the purposes of test automation, self-running demos  and other applications where control of the mouse and keyboard is needed. Robot can be used to facilitate automated testing of Java platform implementations. I used Robot class in my test case to simulate keyboard keys combination ALT+ SPACE and then used down arrows keys to select maximize option in menu.

Robot robot = new Robot();

// Press ALT and SPACE Keys

robot.keyPress(KeyEvent.VK_ALT);
robot.keyPress(KeyEvent.VK_SPACE);
robot.keyRelease(KeyEvent.VK_ALT);
robot.keyRelease(KeyEvent.VK_SPACE);
Thread.sleep(1000);
//Press down arrow keys to move to select Maximize option in menu

robot.keyPress(KeyEvent.VK_DOWN);
robot.keyRelease(KeyEvent.VK_DOWN);
Thread.sleep(100);

robot.keyPress(KeyEvent.VK_DOWN);
robot.keyRelease(KeyEvent.VK_DOWN);
Thread.sleep(100);

robot.keyPress(KeyEvent.VK_DOWN);
robot.keyRelease(KeyEvent.VK_DOWN);
Thread.sleep(100);

robot.keyPress(KeyEvent.VK_DOWN);
robot.keyRelease(KeyEvent.VK_DOWN);
Thread.sleep(100);
//Press enter to invoke the Maximize menu option

robot.keyPress(KeyEvent.VK_ENTER);
robot.keyRelease(KeyEvent.VK_ENTER);
}

3. Sikuli is a robust and powerful tool to automate and tests user interfaces screenshots. Sikuli commands can be easily integrated with java code. We just need to download sikul-script jar and configure in build path. After configuring in build path, create and initialize an instance of Screen object.

Screen screen = new Screen();

Capture image which you want to get clicked during execution of your test case. For Example:- Take a snapshot of maximize button on browser and save it anywhere on your disk or in any folder of your project and then give its path in click command just like below:-

screen.click("Image Path");

4. Fourth way is to use Toolkit utility which query the native operating system directly and is platform independent. In addition to this, the code below will maximize the browser window according to your system's current resolution.

driver.manage().window().setPosition(new Point(0,0));
java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
Dimension dim = new Dimension((int) screenSize.getWidth(), (int) screenSize.getHeight());
driver.manage().window().setSize(dim);

I don't say these above are the only ways to maximize browser window . I am sure there are other ways also. I have mentioned all of them in one blog so that it would be helpful for readers to try and know different ways. It would be really helpful to me as well as to other readers if anybody of you can also suggest tried and tested other ways of doing it and  paste your codes in comments.

Filed under: Test Auotmation, WebDriver