/**
* @magentoDataFixture simpleProductFixture
*/
public function testSaveWithNullQty()
{
$this->_model->setProductId(1)->setTypeId(\Magento\Catalog\Model\Product\Type::DEFAULT_TYPE)->setStockId(\Magento\CatalogInventory\Model\Stock::DEFAULT_STOCK_ID)->setQty(null);
$this->_model->save();
$this->_model->setQty(2);
$this->_model->save();
$this->assertEquals('2.0000', $this->_model->load(1)->getQty());
$this->_model->setQty(0);
$this->_model->save();
$this->assertEquals('0.0000', $this->_model->load(1)->getQty());
$this->_model->setQty(null);
$this->_model->save();
$this->assertEquals(null, $this->_model->load(1)->getQty());
}