As a suggestion, I suggest that the diff image doesn't need to be created unless there is a difference.
Currently, this will create a diffImage.png every time, even if there is no difference.
//Shutterbug.shootPage(driver,ScrollStrategy.WHOLE_PAGE).equalsWithDiff(expectedImage,"observed\diffImage");
As a suggestion, I suggest that the diff image doesn't need to be created unless there is a difference.
Currently, this will create a diffImage.png every time, even if there is no difference.
//Shutterbug.shootPage(driver,ScrollStrategy.WHOLE_PAGE).equalsWithDiff(expectedImage,"observed\diffImage");