ENGCOM-4015: [Backport] #12194: Tier price on configurable product sorting so… #20642

Author: sidolov

app/code/Magento/Catalog/Model/ResourceModel/Product/Collection.php

@@ -2205,7 +2205,7 @@ private function getTierPriceSelect(array $productIds)
             $this->getLinkField() . ' IN(?)',
             $productIds
         )->order(
-            $this->getLinkField()
+            'qty'
         );
         return $select;
     }

app/code/Magento/Catalog/Test/Unit/Model/ResourceModel/Product/CollectionTest.php

@@ -318,7 +318,7 @@ public function testAddTierPriceDataByGroupId()
                 [ '(customer_group_id=? AND all_groups=0) OR all_groups=1', $customerGroupId]
             )
             ->willReturnSelf();
-        $select->expects($this->once())->method('order')->with('entity_id')->willReturnSelf();
+        $select->expects($this->once())->method('order')->with('qty')->willReturnSelf();
         $this->connectionMock->expects($this->once())
             ->method('fetchAll')
             ->with($select)
@@ -370,7 +370,7 @@ public function testAddTierPriceData()
         $select->expects($this->exactly(1))->method('where')
             ->with('entity_id IN(?)', [1])
             ->willReturnSelf();
-        $select->expects($this->once())->method('order')->with('entity_id')->willReturnSelf();
+        $select->expects($this->once())->method('order')->with('qty')->willReturnSelf();
         $this->connectionMock->expects($this->once())
             ->method('fetchAll')
             ->with($select)