Take screenshot of failed Behat step

FeatureContext.php

<?php

use Behat\Behat\Event\StepEvent;
use Behat\Behat\Event\SuiteEvent;
use Behat\MinkExtension\Context\MinkContext;

class FeatureContext extends MinkContext
{
    /**
     * @AfterStep
     */
    public function after(StepEvent $event)
    {
        if ($event->hasException()) {
            $title = $event->getLogicalParent()->getTitle();

            $this->saveScreenshot($title . '.png', __DIR__ . '/../../logs');
        }
    }
}