public function testConstruct()
{
$el = new CircularListElement();
$this->assertNull($el->getValue());
$this->assertEquals($el, $el->getNext());
$this->assertEquals($el, $el->getPrev());
}
/**
* Go to the previous element and returns it.
*
* @return CircularListElement|null Previous element
*
* @api
*/
public function prev()
{
$this->cursor = $this->cursor->getPrev();
return $this->cursor;
}
