ACP2E-10: Incorrect Discount: Two Cart rules with and without coupon

Author: victor-v-rad

app/code/Magento/SalesRule/Model/Validator.php

@@ -59,7 +59,7 @@ class Validator extends \Magento\Framework\Model\AbstractModel
     protected $_skipActionsValidation = false;
 
     /**
-     * Catalog data
+     * Catalog data helper
      *
      * @var \Magento\Catalog\Helper\Data|null
      */

app/code/Magento/SalesRule/Test/Unit/Model/Quote/DiscountTest.php

@@ -231,12 +231,13 @@ public function testCollectItemHasParent()
     {
         $itemWithParentId = $this->getMockBuilder(Item::class)
             ->addMethods(['getNoDiscount'])
-            ->onlyMethods(['getParentItem', 'getId'])
+            ->onlyMethods(['getParentItem', 'getId', 'getExtensionAttributes'])
             ->disableOriginalConstructor()
             ->getMock();
         $itemWithParentId->expects($this->once())->method('getNoDiscount')->willReturn(false);
         $itemWithParentId->expects($this->any())->method('getId')->willReturn(1);
         $itemWithParentId->expects($this->any())->method('getParentItem')->willReturn(true);
+        $itemWithParentId->expects($this->any())->method('getExtensionAttributes')->willReturn(false);
 
         $this->validatorMock->expects($this->any())->method('canApplyDiscount')->willReturn(true);
         $this->validatorMock->expects($this->any())->method('sortItemsByPriority')