public function testRewindData()
{
$doc = new DocumentSet(array('model' => $this->_model, 'data' => array(array('_id' => 1, 'name' => 'One'), array('_id' => 2, 'name' => 'Two'), array('_id' => 3, 'name' => 'Three'))));
$expected = array('_id' => 1, 'name' => 'One');
$result = $doc->rewind()->data();
$this->assertEqual($expected, $result);
}