public function testSerializeObjectWithRelations() { $author = new Author(); $author->setFirstName('John'); $book = new Book(); $book->setTitle('Foo4'); $book->setISBN('1234'); $book->setAuthor($author); $book->save(); $b = clone $book; $sb = serialize($b); $book->clearAllReferences(); $this->assertEquals($book, unserialize($sb)); }