at the end of the day, it was inevitable

behat/Common/Util/Index/InternalSourceConnection.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Common\Util\Index;
+
+use IndexBundle\Index\Source\SourceIndexInterface;
+use IndexBundle\Model\Generator\SourceDocumentGenerator;
+use IndexBundle\Model\DocumentInterface;
+use IndexBundle\Util\Initializer\SourceIndexInitializer;
+
+/**
+ * Class InternalSourceConnection
+ * @package Common\Util\Index
+ */
+class InternalSourceConnection extends AbstractTestIndexConnection implements SourceIndexInterface
+{
+
+    /**
+     * @var SourceDocumentGenerator
+     */
+    private $documentGenerator;
+
+    /**
+     * ExternalIndexConnection constructor.
+     *
+     * @param SourceIndexInterface $index A SourceIndexInterface interface.
+     */
+    public function __construct(SourceIndexInterface $index)
+    {
+        parent::__construct($index);
+        $this->documentGenerator = new SourceDocumentGenerator();
+    }
+
+    /**
+     * Setup internal index.
+     *
+     * @return void
+     */
+    public function setup()
+    {
+        SourceIndexInitializer::initialize($this);
+    }
+
+    /**
+     * Create new document for this index.
+     *
+     * @return DocumentInterface
+     */
+    public function createDocument()
+    {
+        return $this->documentGenerator->generate();
+    }
+}