How to catch white screen or black screen using robotframework or selenium

Question

My project is to catch certain error message that can possibly show on website using robot framework and selenium. such as 400 - 500 error messages.

ex:

404. page not found

But we cannot catch empty page like white screen or black screen.

Is there a way for robot/selenium to tell if the page is just all white or all black ? whith no text visible or any element visible.

Thanks

Answer 1

Just get the source and check any unique text or tag and use it in the place of "application-footer". In my case i used application-footer which is available in my source. So Use this below code to find blank page, this is the workaround I used

    ${Source}=    Get Source
    Log    ${Source}
    ${Blank_status} =    Run Keyword And Return Status    Should Contain    ${Source}    application-footer
    Run Keyword If     "${Blank_status}" == "False"     FAIL    Displayed Empty Page 

If you want to Handle Failure in your own way, then instead of FAIL keyword write your own keyword to Handle and call the keyword

Run Keyword If    "${Blank_status}" == "False"         Error_Handle

*** Keywords ***
Error_Handle
# write your handling code