silverstripe-cms/tests/behat/features/bootstrap/FeatureContext.php

<?php

namespace SilverStripe\Cms\Test\Behaviour;

use SilverStripe\BehatExtension\Context\SilverStripeContext,
    SilverStripe\BehatExtension\Context\BasicContext,
    SilverStripe\BehatExtension\Context\LoginContext,
    SilverStripe\BehatExtension\Context\FixtureContext,
    SilverStripe\Framework\Test\Behaviour\CmsFormsContext,
    SilverStripe\Framework\Test\Behaviour\CmsUiContext,
    SilverStripe\Cms\Test\Behaviour;

// PHPUnit
require_once 'PHPUnit/Autoload.php';
require_once 'PHPUnit/Framework/Assert/Functions.php';

/**
 * Features context
 *
 * Context automatically loaded by Behat.
 * Uses subcontexts to extend functionality.
 */
class FeatureContext extends \SilverStripe\Framework\Test\Behaviour\FeatureContext
{
    /**
     * 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 $parameters)
    {
        parent::__construct($parameters);

        // Override existing fixture context with more specific one
        $fixtureContext = new \SilverStripe\Cms\Test\Behaviour\FixtureContext($parameters);
        $fixtureContext->setFixtureFactory($this->getFixtureFactory());
        $this->useContext('FixtureContext', $fixtureContext);

        // Use blueprints which auto-publish all subclasses of SiteTree
        $factory = $fixtureContext->getFixtureFactory();
        foreach(\ClassInfo::subclassesFor('SiteTree') as $id => $class) {
            $blueprint = \Injector::inst()->create('FixtureBlueprint', $class);
            $blueprint->addCallback('afterCreate', function($obj, $identifier, &$data, &$fixtures) {
                $obj->publish('Stage', 'Live');
            });
            $factory->define($class, $blueprint);
        } 

    }

}