public function testProcess()
{
$this->items[0] = new Item();
$this->items[1] = new Item();
$this->items[2] = new Item();
$this->items[3] = new Item();
$date0 = new DateTime();
$date1 = new DateTime();
$date0->modify('-1 day');
$this->items[0]->setDate($date0);
$this->items[1]->setDate($date1);
$this->items[2]->setDate($date0);
$this->items = $this->processor->process($this->items);
$this->assertEquals($this->items[0]->getDate(), $date1);
}