added test case to demonstrate PHP crashing when trying to save circular...

added test case to demonstrate PHP crashing when trying to save circular self-referencing relations (ticket #364)

tests/Ticket364TestCase.php

+<?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+
+/**
+ * Doctrine_Ticket364_TestCase
+ *
+ * @package     Doctrine
+ * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
+ * @author      Jan Schaefer <tanken@gmx.de> 
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision$
+ */
+class Doctrine_Ticket364_TestCase extends Doctrine_UnitTestCase {
+
+    public function prepareData() 
+    { }
+    public function prepareTables() 
+    {
+        $this->tables = array('NestTest', 'NestReference');
+        
+        parent::prepareTables();
+    }
+	
+    public function testCircularNonEqualSelfReferencingRelationSaving() {
+        $n1 = new NestTest();
+        $n1->set('name', 'node1');
+        $n1->save();
+        $n2 = new NestTest();
+        $n2->set('name', 'node2');
+        $n2->save();
+
+        $n1->get('Children')->add($n2);
+        $n1->save();
+        $n2->get('Children')->add($n1);
+        $n2->save();
+    }
+
+    public function testCircularEqualSelfReferencingRelationSaving() {
+        $n1 = new NestTest();
+        $n1->set('name', 'node1');
+        $n1->save();
+        $n2 = new NestTest();
+        $n2->set('name', 'node2');
+        $n2->save();
+
+        $n1->get('Relatives')->add($n2);
+        $n1->save();
+        $n2->get('Relatives')->add($n1);
+        $n2->save();
+    }
+
+}
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