[DDC-2074] Added test for PersistentCollection#clear.

tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2074Test.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\ORM\PersistentCollection;
+use Doctrine\Tests\Models\ECommerce\ECommerceCategory;
+use Doctrine\Tests\Models\ECommerce\ECommerceProduct;
+
+/**
+ * @group DDC-2074
+ */
+class DDC2074Test extends \Doctrine\Tests\OrmFunctionalTestCase
+{
+    public function testShouldNotScheduleDeletionOnClonedInstances()
+    {
+        $class = $this->_em->getClassMetadata('Doctrine\Tests\Models\ECommerce\ECommerceProduct');
+        $product = new ECommerceProduct();
+        $category = new ECommerceCategory();
+        $collection = new PersistentCollection($this->_em, $class, new ArrayCollection(array($category)));
+        $collection->setOwner($product, $class->associationMappings['categories']);
+
+        $uow = $this->_em->getUnitOfWork();
+        $clonedCollection = clone $collection;
+        $clonedCollection->clear();
+
+        $this->assertEquals(0, count($uow->getScheduledCollectionDeletions()));
+    }
+}