function it_merges_equal_items(OrderItemInterface $item1, OrderItemInterface $item2)
{
$item1->setOrder($this)->shouldBeCalled();
$item1->merge($item2, false)->shouldBeCalled();
$item1->equals($item2)->willReturn(true);
$item2->equals($item1)->willReturn(true);
$this->addItem($item1);
$this->addItem($item2);
$this->countItems()->shouldReturn(1);
}