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diff --git a/vendor/behat/behat/src/Behat/Behat/Gherkin/Specification/LazyFeatureIterator.php b/vendor/behat/behat/src/Behat/Behat/Gherkin/Specification/LazyFeatureIterator.php
new file mode 100644
index 000000000..61dd9bdb2
--- /dev/null
+++ b/vendor/behat/behat/src/Behat/Behat/Gherkin/Specification/LazyFeatureIterator.php
@@ -0,0 +1,207 @@
+<?php
+
+/*
+ * This file is part of the Behat.
+ * (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\Behat\Gherkin\Specification;
+
+use Behat\Gherkin\Filter\FilterInterface;
+use Behat\Gherkin\Filter\NameFilter;
+use Behat\Gherkin\Filter\NarrativeFilter;
+use Behat\Gherkin\Filter\RoleFilter;
+use Behat\Gherkin\Filter\TagFilter;
+use Behat\Gherkin\Gherkin;
+use Behat\Gherkin\Node\FeatureNode;
+use Behat\Testwork\Specification\SpecificationIterator;
+use Behat\Testwork\Suite\Exception\SuiteConfigurationException;
+use Behat\Testwork\Suite\Suite;
+
+/**
+ * Lazily iterates (parses one-by-one) over features.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+final class LazyFeatureIterator implements SpecificationIterator
+{
+    /**
+     * @var Suite
+     */
+    private $suite;
+    /**
+     * @var Gherkin
+     */
+    private $gherkin;
+    /**
+     * @var string[]
+     */
+    private $paths = array();
+    /**
+     * @var FilterInterface[]
+     */
+    private $filters = array();
+    /**
+     * @var integer
+     */
+    private $position = 0;
+    /**
+     * @var FeatureNode[]
+     */
+    private $features = array();
+    /**
+     * @var FeatureNode
+     */
+    private $currentFeature;
+
+    /**
+     * Initializes specifications.
+     *
+     * @param Suite             $suite
+     * @param Gherkin           $gherkin
+     * @param string[]          $paths
+     * @param FilterInterface[] $filters
+     */
+    public function __construct(Suite $suite, Gherkin $gherkin, array $paths, array $filters = array())
+    {
+        $this->suite = $suite;
+        $this->gherkin = $gherkin;
+        $this->paths = array_values($paths);
+        $this->filters = array_merge($this->getSuiteFilters($suite), $filters);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSuite()
+    {
+        return $this->suite;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rewind()
+    {
+        $this->position = 0;
+        $this->moveToNextAvailableFeature();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function next()
+    {
+        $this->moveToNextAvailableFeature();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function valid()
+    {
+        return null !== $this->currentFeature;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function key()
+    {
+        return $this->position;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function current()
+    {
+        return $this->currentFeature;
+    }
+
+    /**
+     * Returns list of filters from suite settings.
+     *
+     * @param Suite $suite
+     *
+     * @return FilterInterface[]
+     */
+    private function getSuiteFilters(Suite $suite)
+    {
+        if (!$suite->hasSetting('filters') || !is_array($suite->getSetting('filters'))) {
+            return array();
+        }
+
+        $filters = array();
+        foreach ($suite->getSetting('filters') as $type => $filterString) {
+            $filters[] = $this->createFilter($type, $filterString, $suite);
+        }
+
+        return $filters;
+    }
+
+    /**
+     * Creates filter of provided type.
+     *
+     * @param string $type
+     * @param string $filterString
+     * @param Suite  $suite
+     *
+     * @return FilterInterface
+     *
+     * @throws SuiteConfigurationException If filter type is not recognised
+     */
+    private function createFilter($type, $filterString, Suite $suite)
+    {
+        if ('role' === $type) {
+            return new RoleFilter($filterString);
+        }
+
+        if ('name' === $type) {
+            return new NameFilter($filterString);
+        }
+
+        if ('tags' === $type) {
+            return new TagFilter($filterString);
+        }
+
+        if ('narrative' === $type) {
+            return new NarrativeFilter($filterString);
+        }
+
+        throw new SuiteConfigurationException(sprintf(
+            '`%s` filter is not supported by the `%s` suite. Supported types are `%s`.',
+            $type,
+            $suite->getName(),
+            implode('`, `', array('role', 'name', 'tags'))
+        ), $suite->getName());
+    }
+
+    /**
+     * Parses paths consequently.
+     */
+    private function moveToNextAvailableFeature()
+    {
+        while (!count($this->features) && $this->position < count($this->paths)) {
+            $this->features = $this->parseFeature($this->paths[$this->position]);
+            $this->position++;
+        }
+
+        $this->currentFeature = array_shift($this->features);
+    }
+
+    /**
+     * Parses feature at path.
+     *
+     * @param string $path
+     *
+     * @return FeatureNode[]
+     */
+    private function parseFeature($path)
+    {
+        return $this->gherkin->load($path, $this->filters);
+    }
+}