/**
* Add "hidden" discount and shipping tax
*
* Go ahead, try to understand ]:->
*
* Tax settings for getting "discount tax":
* - Catalog Prices = Including Tax
* - Apply Customer Tax = After Discount
* - Apply Discount on Prices = Including Tax
*
* Test case for getting "hidden shipping tax":
* - Make sure shipping is taxable (set shipping tax class)
* - Catalog Prices = Including Tax
* - Shipping Prices = Including Tax
* - Apply Customer Tax = After Discount
* - Create a shopping cart price rule with % discount applied to the Shipping Amount
* - run shopping cart and estimate shipping
* - go to PayPal
*
* @param \Magento\Payment\Model\Cart\SalesModel\SalesModelInterface $salesEntity
* @return void
*/
protected function _applyHiddenTaxWorkaround(\Magento\Payment\Model\Cart\SalesModel\SalesModelInterface $salesEntity)
{
$dataContainer = $salesEntity->getTaxContainer();
$this->addTax((double) $dataContainer->getBaseHiddenTaxAmount());
$this->addTax((double) $dataContainer->getBaseShippingHiddenTaxAmnt());
}
