ACP2E-1313: Refund shipping issue with discounted order (Apply Discount On Prices = Including tax)

Author: o-iegorov

app/code/Magento/Sales/Test/Unit/Model/Order/Creditmemo/Total/ShippingTest.php

@@ -509,9 +509,10 @@ public function testCollectRefundShippingAmountIncTax()
     /**
      * situation: The admin user specified the desired refund amount that has taxes and discount embedded within it
      *
+     * @dataProvider calculationSequenceDataProvider
      * @throws LocalizedException
      */
-    public function testCollectUsingShippingInclTaxAndDiscountOnExclBeforeTax()
+    public function testCollectUsingShippingInclTaxAndDiscountBeforeTax(string $calculationSequence)
     {
         $this->taxConfig->expects($this->any())->method('displaySalesShippingInclTax')->willReturn(true);
         $this->taxConfig->expects($this->any())
@@ -603,4 +604,15 @@ public function testCollectUsingShippingInclTaxAndDiscountOnExclBeforeTax()
             ->willReturnSelf();
         $this->shippingCollector->collect($this->creditmemoMock);
     }
+
+    /**
+     * @return array
+     */
+    public function calculationSequenceDataProvider(): array
+    {
+        return [
+            'inclTax' => [TaxCalculation::CALC_TAX_AFTER_DISCOUNT_ON_INCL],
+            'exclTax' => [TaxCalculation::CALC_TAX_AFTER_DISCOUNT_ON_EXCL],
+        ];
+    }
 }