Taking screenshots of failed scenarios in behat3

football
   build
      phing
         behat
            screenshots

"require-dev": {
    "behat/behat" : "3.0.15",
    "behat/symfony2-extension" : "2.0.0",
    "behat/mink": "1.6.1",
    "behat/mink-extension": "2.0.1",
    "behat/mink-browserkit-driver": "1.2.0",
    "behat/mink-goutte-driver": "1.1.0",
    "behat/mink-selenium2-driver": "1.2.0"
}

default:
    extensions:
        Behat\Symfony2Extension: ~
        Behat\MinkExtension:
            base_url: http://football.local/app_test.php
            browser_name: firefox
            sessions:
                goutte: # fast, CLI, browser, no javascript support
                    goutte: ~
                selenium2: # fast, CLI, opens up a browser
                    selenium2: ~
                symfony2: # bleeding fast, CLI, no browser
                    symfony2: ~
    suites:
        backend:
            type: symfony_bundle
            bundle: ApplicationBackendBundle
            mink_session: selenium2
            contexts:
                - Application\BackendBundle\Features\Context\FeatureContext:
                    screen_shot_path: build/phing/behat/screenshot

        frontend:
            type: symfony_bundle
            bundle: ApplicationFrontendBundle
            mink_session: selenium2
            contexts:
                - Application\FrontendBundle\Features\Context\FeatureContext:
                    screen_shot_path: build/phing/behat/screenshot

namespace Application\BackendBundle\Features\Context;

use Behat\Behat\Hook\Scope\AfterStepScope;
use Behat\Mink\Driver\Selenium2Driver;
use Behat\MinkExtension\Context\MinkContext;

class FeatureContext extends MinkContext
{
    private $screenShotPath;

    public function __construct($screen_shot_path)
    {
        $this->screenShotPath = $screen_shot_path;
    }

    /**
     * Take screen-shot when step fails. Works only with Selenium2Driver.
     *
     * @AfterStep
     * @param AfterStepScope $scope
     */
    public function takeScreenshotAfterFailedStep(AfterStepScope $scope)
    {
        if (99 === $scope->getTestResult()->getResultCode()) {
            $driver = $this->getSession()->getDriver();

            if (! $driver instanceof Selenium2Driver) {
                return;
            }

            if (! is_dir($this->screenShotPath)) {
                mkdir($this->screenShotPath, 0777, true);
            }

            $filename = sprintf(
                '%s_%s_%s.%s',
                $this->getMinkParameter('browser_name'),
                date('Ymd') . '-' . date('His'),
                uniqid('', true),
                'png'
            );

            $this->saveScreenshot($filename, $this->screenShotPath);
        }
    }
}

# If you want to use firefox:
java -jar selenium-server-standalone-2.43.1.jar
# If you want to use chromedriver (chromedriver has Linux and Mac versions):
java -jar selenium-server-standalone-2.43.1.jar  -Dwebdriver.chrome.driver="chromedriver"

bin/behat --suite=backend