/**
  * @dataProvider getNextData
  */
 public function testGetNext($expected, $path, $anchor = null, $depth = null, $class = 'Doctrine\\ODM\\PHPCR\\Document\\Generic')
 {
     $next = $this->helper->getNext($path, $anchor, $depth);
     if (null === $expected) {
         $this->assertNull($next);
     } else {
         $this->assertInstanceOf($class, $next);
         $this->assertEquals($expected, $next->getId());
     }
 }