Test sulle immagini

Giorgio Sironi

Collaudare!

Fotografare

Selenium 2 JSON Wire Protocol 


GET /session/:sessionId/screenshot
(PNG blob encoded in base64)

Su browser multipli


array( 
    'browserName' => 'internet explorer', 
    'host' => SAUCE_HOST, 
    'port' => 4444, 
    'desiredCapabilities' => array( 
        'platform' => 'Windows 2008', 
        'version' => '9' 
    ), 
),
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Il riferimento

Screenshot Strategy pattern UML diagram 

STORE_SCREENSHOTS=1 phpunit \
> spec/crossbrowser/PaymentPageDesktopTest.php

Confronto


$ phpunit spec/crossbrowser/PaymentPageDesktopTest.php
// under the covers:
$ convert screenshot.png screenshot.pnm
$ imgcmp -f reference.pnm -F screenshot.png -m mae \
> | paste -sd+ | bc 
1.025523
// threshold can be as low as 0.0001
$ compare reference.png screenshot.png difference.png

Risultati

Reference
Screenshot taken
Generated diff

Conclusioni

  • Un test, tanti browser
  • Open source rende questo possibile
  • Test robusti richiedono lavoro

Thanks

Che assert() sia con voi