Compare method with Selenium

Chaoui05 has asked for the wisdom of the Perl Monks concerning the following question:

Hi every Monks ! I am appealing to your wisdom yet again. I have an issue. Iam using Selenium::Screenshot. I get screenshots i'd like to compare. I did this following code:

  $driver->set_window_size(320, 480);
    $elem = $driver->find_element('applgs','id' ); 
    my $white = Selenium::Screenshot->new(
                   png => $driver->screenshot,
                   exclude => [{
                     size     => { width => 10, height => 10 }, 
                     location => { x => 5, y => 5 }, 
      }]
    )->save( file => "snapScreenshot" );
    $driver->execute_script('document.getElementsByTagName("body")[0].
+style.backgroundColor = "red"');
    my $blue = Selenium::Screenshot->new(png => $driver->screenshot)->
+save( file => "snapScreenshot1" );

    unless ($white->compare($blue)) {
      my $diff_file = $white->difference($blue);
      print 'The images differ; see ' . $diff_file . ' for details';
    }
[download]

But i get after this ouput in my Shell:

not ok 22 - A_test died (Can't locate object method "compare" via pack
+age "D:/t/gui-tests/tests/screenshots/snapScreenshot-firefox.png
" (perhaps you forgot to load "D:/t/gui-tests/tests/screenshots/snapSc
+reenshot-firefox.png"?) at MyTestingSuite.pm line 260.)
[download]

I have my 2 screenshots and one of them have got effectively its body in red. Somenone can help ? Many Thanks !!

Comment on Compare method with Selenium Select or Download Code

Replies are listed 'Best First'.
Re: Compare method with Selenium by choroba (Cardinal) on May 25, 2016 at 07:45 UTC
`$white` should contain an object (or a package name) in order to have methods run on itself. `Selenium::Screenshot->new` returns the object you want, but you called `->save` on it, which returned only the file name. You can't chain the constructor with the `save` method. `my $white = 'Selenium::Screenshot'->new( png => $driver->screenshot, exclude => [{ size => { width => 10, height => 10 }, location => { x => 5, y => 5 }, }]); $white->save( file => "snapScreenshot" );` [download] ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l] [select]
Re^2: Compare method with Selenium by Chaoui05 (Scribe) on May 25, 2016 at 08:16 UTC
Thanks Choroba ! It works right now . But i have another issue. Why i could not have a black out in my page. It should work : `$elem = $driver->find_element('applgs','id' ); my $white = 'Selenium::Screenshot'->new( png => $driver->screenshot, exclude => [{ size => { width => 10, height => 10 }, # siz +e => $elem->get_size, location => { x => 5, y => 5 }, #location => $el +em->get_element_location, }] );` [download]	[reply] [d/l]
Re: Compare method with Selenium by ablanke (Monsignor) on May 25, 2016 at 08:16 UTC
Hello Chaoui05, I assume the return value of the save Method is stored in your Scalars `$white` and `$blue` Try this: `my $white = Selenium::Screenshot->new( png => $driver->screenshot, exclude => [{ size => { width => 10, height => 10 }, location => { x => 5, y => 5 }, }] ); $white->save( file => "snapScreenshot" );` [download]	[reply] [d/l] [select]
Re^2: Compare method with Selenium by Chaoui05 (Scribe) on May 25, 2016 at 08:31 UTC
Hello ablanke Thanks. I did that and it's perfect. But now i have another issue. I can't get a black out on my page doing that : `$elem = $driver->find_element('applgs','id' ); my $white = Selenium::Screenshot->new( png => $driver->screenshot, exclude => [{ size => { width => 10, height => 10 }, # siz +e => $elem->get_size, location => { x => 5, y => 5 }, #location => $el +em->get_element_location, }] );` [download] Thanks again !	[reply] [d/l]