From cafdce9d8e3946a2f547187de5d70bcdbeb1a772 Mon Sep 17 00:00:00 2001
From: benjicarson <84831726+benjicarson@users.noreply.github.com>
Date: Thu, 18 Nov 2021 10:55:19 +1300
Subject: [PATCH] fix: Resolve Calculator::getDiscountableAmount incongruity

OrderItem::DiscountableAmount is on a per-unit basis, whereas Calculator::getDiscountableAmount relies on an OrderItem::Total equivalent value.
---
 src/Calculator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Calculator.php b/src/Calculator.php
index 4e8004a..c04a36a 100644
--- a/src/Calculator.php
+++ b/src/Calculator.php
@@ -168,7 +168,7 @@ protected function getDiscountableAmount($discount)
         foreach ($this->order->Items() as $item) {
             if (ItemDiscountConstraint::match($item, $discount)) {
                 $amount += $item->hasMethod('DiscountableAmount') ?
-                            $item->DiscountableAmount() :
+                            $item->DiscountableAmount() * $item->Quantity :
                             $item->Total();
             }
         }