--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat Testwork.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Testwork\Specification\ServiceContainer;
+
+use Behat\Testwork\ServiceContainer\Extension;
+use Behat\Testwork\ServiceContainer\ExtensionManager;
+use Behat\Testwork\ServiceContainer\ServiceProcessor;
+use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+
+/**
+ * Extends testwork with test specification services.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+final class SpecificationExtension implements Extension
+{
+ /*
+ * Available services
+ */
+ const FINDER_ID = 'specifications.finder';
+
+ /*
+ * Available extension points
+ */
+ const LOCATOR_TAG = 'specifications.locator';
+
+ /**
+ * @var ServiceProcessor
+ */
+ private $processor;
+
+ /**
+ * Initializes extension.
+ *
+ * @param null|ServiceProcessor $processor
+ */
+ public function __construct(ServiceProcessor $processor = null)
+ {
+ $this->processor = $processor ? : new ServiceProcessor();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getConfigKey()
+ {
+ return 'specifications';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function initialize(ExtensionManager $extensionManager)
+ {
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function configure(ArrayNodeDefinition $builder)
+ {
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function load(ContainerBuilder $container, array $config)
+ {
+ $this->loadFinder($container);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function process(ContainerBuilder $container)
+ {
+ $this->processLocators($container);
+ }
+
+ /**
+ * Loads specification finder.
+ *
+ * @param ContainerBuilder $container
+ */
+ private function loadFinder(ContainerBuilder $container)
+ {
+ $definition = new Definition('Behat\Testwork\Specification\SpecificationFinder');
+ $container->setDefinition(self::FINDER_ID, $definition);
+ }
+
+ /**
+ * Processes specification locators.
+ *
+ * @param ContainerBuilder $container
+ */
+ private function processLocators(ContainerBuilder $container)
+ {
+ $references = $this->processor->findAndSortTaggedServices($container, self::LOCATOR_TAG);
+ $definition = $container->getDefinition(self::FINDER_ID);
+
+ foreach ($references as $reference) {
+ $definition->addMethodCall('registerSpecificationLocator', array($reference));
+ }
+ }
+}