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diff --git a/vendor/phpspec/prophecy/src/Prophecy/Doubler/ClassPatch/TraversablePatch.php b/vendor/phpspec/prophecy/src/Prophecy/Doubler/ClassPatch/TraversablePatch.php
new file mode 100644
index 000000000..eea020282
--- /dev/null
+++ b/vendor/phpspec/prophecy/src/Prophecy/Doubler/ClassPatch/TraversablePatch.php
@@ -0,0 +1,83 @@
+<?php
+
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Prophecy\Doubler\ClassPatch;
+
+use Prophecy\Doubler\Generator\Node\ClassNode;
+use Prophecy\Doubler\Generator\Node\MethodNode;
+
+/**
+ * Traversable interface patch.
+ * Forces classes that implement interfaces, that extend Traversable to also implement Iterator.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+class TraversablePatch implements ClassPatchInterface
+{
+    /**
+     * Supports nodetree, that implement Traversable, but not Iterator or IteratorAggregate.
+     *
+     * @param ClassNode $node
+     *
+     * @return bool
+     */
+    public function supports(ClassNode $node)
+    {
+        if (in_array('Iterator', $node->getInterfaces())) {
+            return false;
+        }
+        if (in_array('IteratorAggregate', $node->getInterfaces())) {
+            return false;
+        }
+
+        foreach ($node->getInterfaces() as $interface) {
+            if ('Traversable' !== $interface && !is_subclass_of($interface, 'Traversable')) {
+                continue;
+            }
+            if ('Iterator' === $interface || is_subclass_of($interface, 'Iterator')) {
+                continue;
+            }
+            if ('IteratorAggregate' === $interface || is_subclass_of($interface, 'IteratorAggregate')) {
+                continue;
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Forces class to implement Iterator interface.
+     *
+     * @param ClassNode $node
+     */
+    public function apply(ClassNode $node)
+    {
+        $node->addInterface('Iterator');
+
+        $node->addMethod(new MethodNode('current'));
+        $node->addMethod(new MethodNode('key'));
+        $node->addMethod(new MethodNode('next'));
+        $node->addMethod(new MethodNode('rewind'));
+        $node->addMethod(new MethodNode('valid'));
+    }
+
+    /**
+     * Returns patch priority, which determines when patch will be applied.
+     *
+     * @return int Priority number (higher - earlier)
+     */
+    public function getPriority()
+    {
+        return 100;
+    }
+}