Set view port size and screenshot for visual testing

[kazurayam]

For your information, have a look at my previous post

TakeFullPage screenshot using incorrect width and height (was working properly before!)

You can read the source code of WebUI.takeFullPageScreenshot keyword: If you read the source of the keyword and related classes, you would find the implementation doesn’t take the DPR into account. Your case seems to be complicated. You case might have some factors that make the keyword to perform wrong. I don’t know what. I don’t have any more clues to resolve your case. You need to find them out on your machine for yourself.

The Katlaon built-in WebUI.take*PageScreenshot* keywords do not take the “Device Pixel Ratio” into account. Therefore, even if I set the view port width of browser to be 800 pixels, the resuliting PNG file will have a different width. The width will be far larger. For examle, a view port of 800 pixcel may result in a PNG file with with of 1600 pixels on my machine. The ratio depends on the “Device Pixcel Ratio” of the machine on which the test code ran.