How to compare two screenshots one taking by IE and other taking by firefox

[Narendra Singh]

Hi ,

can we compare two screenshots using FLB if there is no animation in application  and how to compare these two?

and PLEASE  tell me if any other way to do web page layout  comparison  and highlighting  the difference between layout

Thanks in advance

[Michael Tamm]

Hi,

FLB does currently not offer any support for detecting layout bugs by comparing screenshots, sorry.

I did some experiments myself in this direction, but its really not easy, when you don't want false positives.

Nevertheless, here is some advice I can offer, if you are going to implement the comparison yourself:

1.) Hide all text first -- text is rendered differently by different browsers.

     You could use the FLB API: WebPage.getScreenshot(WITH_ALL_TEXT_TRANSPARENT)

2.) Do not try to compare entire screenshots, but only regions covered by certain HTML elements.

     To determine the coordinates and dimensions of those regions, you can use JavaScript or the WebDriver API

Further information and tools can be found here: http://sqa.stackexchange.com/questions/2459/compare-screenshots-of-rendered-web-pages

Kind regards, Michael

2014/1/16 Narendra Singh <narend...@gmail.com>

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