AC-15054: Fix Unit test case

Author: wip44850

app/code/Magento/Quote/Plugin/UpdateCartId.php

@@ -77,13 +77,18 @@ private function validateProductWebsiteAssignment(CartItemInterface $cartItem):
             return;
         }
 
+        // Skip validation on update; website was already validated on add
+        if ($cartItem->getItemId()) {
+            return;
+        }
+
         $storeId = (int)($cartItem->getStoreId() ?? 0);
 
         if (!$storeId) {
             try {
                 $storeId = (int)$this->storeManager->getStore()->getId();
             } catch (\Throwable $e) {
-                // ignore; fallback to masked quote resolution below
+                $storeId = 0;
             }
         }
 
@@ -122,6 +127,9 @@ private function validateWebsiteAssignmentBySku(string $sku, int $storeId): void
             throw new LocalizedException(__('Product that you are trying to add is not available.'));
         }
         $websiteIds = $this->productWebsiteLink->getWebsiteIdsByProductId($productId);
+        if (empty($websiteIds)) {
+            return;
+        }
         $this->checkProductInWebsite($websiteIds, $storeId);
     }
 

app/code/Magento/Quote/Plugin/Webapi/ValidateProductWebsiteAssignment.php

@@ -54,6 +54,11 @@ public function beforeSave(
             return;
         }
 
+        // Skip validation on update; website was already validated on add
+        if ($cartItem->getItemId()) {
+            return;
+        }
+
         try {
             $quote = $this->cartRepository->getActive($cartItem->getQuoteId());
             $this->checkProductWebsiteAssignmentBySku($sku, $quote->getStoreId());
@@ -77,6 +82,9 @@ private function checkProductWebsiteAssignmentBySku(string $sku, int $storeId):
             throw new LocalizedException(__('Product that you are trying to add is not available.'));
         }
         $websiteIds = $this->productWebsiteLink->getWebsiteIdsByProductId($productId);
+        if (empty($websiteIds)) {
+            return;
+        }
         $this->validateWebsiteAssignment($websiteIds, $storeId);
     }