MAGETWO-30913: Error when trying to apply coupon code in backend reorder after unchecking the discount apply checkbox

Author: Olexandr Lysenko

dev/tests/unit/testsuite/Magento/SalesRule/Model/Quote/DiscountTest.php

@@ -89,11 +89,14 @@ public function testCollectItemNoDiscount()
     {
         $itemNoDiscount = $this->getMockBuilder('Magento\Sales\Model\Quote\Item')
             ->disableOriginalConstructor()
-            ->setMethods(['getNoDiscount', '__wakeup'])
+            ->setMethods(['getNoDiscount', 'setIsApplyDiscount', '__wakeup'])
             ->getMock();
         $itemNoDiscount->expects($this->once())
             ->method('getNoDiscount')
             ->willReturn(true);
+        $itemNoDiscount->expects($this->once())
+            ->method('setIsApplyDiscount')
+            ->willReturn(false);
 
         $this->validatorMock->expects($this->any())
             ->method('sortItemsByPriority')
@@ -201,6 +204,7 @@ public function testCollectItemHasChildren($childItemData, $parentData, $expecte
                     'getHasChildren',
                     'isChildrenCalculated',
                     'getChildren',
+                    'setIsApplyDiscount',
                     '__wakeup',
                 ]
             )
@@ -214,6 +218,9 @@ public function testCollectItemHasChildren($childItemData, $parentData, $expecte
         $itemWithChildren->expects($this->once())
             ->method('getHasChildren')
             ->willReturn(true);
+        $itemWithChildren->expects($this->once())
+            ->method('setIsApplyDiscount')
+            ->willReturn(true);
         $itemWithChildren->expects($this->once())
             ->method('isChildrenCalculated')
             ->willReturn(true);
@@ -332,13 +339,17 @@ public function testCollectItemHasNoChildren()
                     'getHasChildren',
                     'isChildrenCalculated',
                     'getChildren',
+                    'setIsApplyDiscount',
                     '__wakeup',
                 ]
             )
             ->getMock();
         $itemWithChildren->expects($this->once())
             ->method('getNoDiscount')
             ->willReturn(false);
+        $itemWithChildren->expects($this->once())
+            ->method('setIsApplyDiscount')
+            ->willReturn(true);
         $itemWithChildren->expects($this->once())
             ->method('getParentItem')
             ->willReturn(false);