Implemented a test to confirm behavior of issue #301

Author: Ville Mattila

tests/Doctrine/ODM/MongoDB/Tests/Functional/Ticket/GH301Test.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Doctrine\ODM\MongoDB\Tests;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;
+
+class GH301Test extends BaseTest
+{
+    public function testPersistIsCascadedInSingleDocumentFlush()
+    {
+        $ref = new GH301Document();
+        $ref->name = 'referenced';
+        
+        $doc = new GH301Document();
+        $doc->name = 'parent';
+        $doc->refOnePersist = $ref;
+
+        $this->dm->persist($doc);
+        $this->dm->flush($doc);
+        $this->dm->clear();
+        
+        $docId = $doc->id; unset($doc);
+        $refId = $ref->id; unset($ref);
+
+        $doc = $this->dm->find(__NAMESPACE__ . '\GH301Document', $docId);
+        $this->assertNotNull($doc);
+        $this->assertEquals($refId, $doc->refOnePersist->id);
+    }
+}
+
+/** @ODM\Document */
+class GH301Document
+{
+    /** @ODM\Id */
+    public $id;
+
+    /** @ODM\String */
+    public $name;
+
+    /**
+     * @ODM\ReferenceOne(targetDocument="GH301Document", cascade="persist")
+     */
+    public $refOnePersist;
+}