Screenshots (and light reports) by Selenium when using Behat and Mink; Only supported by Selenium2/Webdriver

gistfile1.php

<?php

use Behat\Behat\Context\ClosuredContextInterface,
    Behat\Behat\Context\TranslatedContextInterface,
    Behat\Behat\Context\BehatContext,
    Behat\Behat\Exception\PendingException;
use Behat\Gherkin\Node\PyStringNode,
    Behat\Gherkin\Node\TableNode;

use Behat\Behat\Event\StepEvent;

/**
 * Features context.
 */
class FeatureContext extends Behat\MinkExtension\Context\MinkContext
{
    /**
     * Initializes context.
     * Every scenario gets it's own context object.
     *
     * @param array $parameters context parameters (set them up through behat.yml)
     */
    public function __construct(array $parameters)
    {
        // Initialize your context here
    }

    /**
     * Take screenshot when step fails.
     * Works only with Selenium2Driver.
     *
     * @AfterStep
     */
    public function takeScreenshotAfterFailedStep($event)
    {
        if (StepEvent::FAILED === $event->getResult()) {
            $driver = $this->getSession()->getDriver();

            if (!($driver instanceof Behat\Mink\Driver\Selenium2Driver)) {
                return;
            }

            $screenshot = $driver->getScreenshot();

            $step = $event->getStep();
            $scenario = $step->getParent();
            $feature = $scenario->getFeature();

            $id_str = time() . '_' . rand(1000, 9999);
            $report_file = "/tmp/report_" . $id_str;

            $fd = fopen($report_file . ".result", "a+");
            fwrite($fd, "File: /tmp/test_" . $id_str . ".png" . "\n");
            fwrite($fd, "Date: " . date(DATE_ATOM) . "\n");
            fwrite($fd, "File: " . $step->getFile() . " at line " . $step->getLine() . "\n");
            fwrite($fd, "Feature: " . $feature->getTitle() . "\n");
            fwrite($fd, "Scenario: " . $scenario->getTitle() . "\n");
            fwrite($fd, "Step: " . $step->getType() . " " . $step->getText() . "\n");
            fclose($fd);

            file_put_contents($report_file . ".png", $screenshot);
        }
    }
}