Re-Sizing the Browser Window to a Custom Resolution During an Automated Test – Sauce Labs

In certain test scenarios, you might want to run browser tests with different screen resolutions than those offered on the Sauce Labs cloud by using the screen resolution desired capability. This enables you to programmatically re-size the browser window using Selenium WebDriver during a test's execution before the commands of the test execute. This article includes examples of how to re-size screen resolutions in several programming languages.

Maximum Resolutions

If you set the resolution greater than the default resolution, or the screenResolution set in the desired capabilities, elements will appear off screen.

Java

Dimension dim = new Dimension(width,height)
driver.manage().window().setSize(dim)

Required Java Library

You need to import the library org.openqa.selenium.Dimension into your Java project before implementing the re-size action in your script.

Python

driver.set_window_size(width, height)

C#

driver.Manage().Window.Size = new Size(x, y);

Required Namespace

You need to include the System.Drawing namespace in your C# project before implementing the re-size action in your script.

JavaScript

selenium-webdriver

driver.manage().window().setSize(x, y);

WebDriverIO

browser.setViewPortSize({ width: x, height: y });

To learn more about changing the window size, check out this blog post and this StackOverflow question.