/**
* Tests that adding a quantity to an item with a parent item and an id will not change the quantity.
*/
public function testAddQtyExistingParentItemAndId()
{
$existingQuantity = 2;
$quantityToAdd = 3;
$parentItemMock = $this->getMockBuilder('Magento\\Sales\\Model\\Quote\\Item')->setMethods(['addChild', '__wakeup'])->disableOriginalConstructor()->getMock();
$this->model->setParentItem($parentItemMock);
$this->model->setId(1);
$this->model->setData('qty', $existingQuantity);
$this->model->addQty($quantityToAdd);
$this->assertEquals($existingQuantity, $this->model->getQty());
$this->assertNull($this->model->getQtyToAdd());
}
