MAGETWO-90533: Error on RMA shipping label creation for FedEx Smart Post

 - Fixed incorrect payment type for FedEx Smart Post Return request
 - Added possibility to parse multiple tracking codes for one Return request

Author: YevSent

app/code/Magento/Fedex/Model/Carrier.php

@@ -9,8 +9,10 @@
 namespace Magento\Fedex\Model;
 
 use Magento\Framework\App\ObjectManager;
+use Magento\Framework\DataObject;
 use Magento\Framework\Module\Dir;
 use Magento\Framework\Serialize\Serializer\Json;
+use Magento\Framework\Webapi\Soap\ClientFactory;
 use Magento\Framework\Xml\Security;
 use Magento\Quote\Model\Quote\Address\RateRequest;
 use Magento\Shipping\Model\Carrier\AbstractCarrierOnline;
@@ -19,7 +21,6 @@
 /**
  * Fedex shipping implementation
  *
- * @author     Magento Core Team <core@magentocommerce.com>
  * @SuppressWarnings(PHPMD.ExcessiveClassComplexity)
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
@@ -145,6 +146,11 @@ class Carrier extends AbstractCarrierOnline implements \Magento\Shipping\Model\C
      */
     private $serializer;
 
+    /**
+     * @var ClientFactory
+     */
+    private $soapClientFactory;
+
     /**
      * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
      * @param \Magento\Quote\Model\Quote\Address\RateResult\ErrorFactory $rateErrorFactory
@@ -166,7 +172,7 @@ class Carrier extends AbstractCarrierOnline implements \Magento\Shipping\Model\C
      * @param \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory
      * @param array $data
      * @param Json|null $serializer
-     *
+     * @param ClientFactory|null $soapClientFactory
      * @SuppressWarnings(PHPMD.ExcessiveParameterList)
      */
     public function __construct(
@@ -189,7 +195,8 @@ public function __construct(
         \Magento\Framework\Module\Dir\Reader $configReader,
         \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
         array $data = [],
-        Json $serializer = null
+        Json $serializer = null,
+        ClientFactory $soapClientFactory = null
     ) {
         $this->_storeManager = $storeManager;
         $this->_productCollectionFactory = $productCollectionFactory;
@@ -216,6 +223,7 @@ public function __construct(
         $this->_rateServiceWsdl = $wsdlBasePath . 'RateService_v10.wsdl';
         $this->_trackServiceWsdl = $wsdlBasePath . 'TrackService_v' . self::$trackServiceVersion . '.wsdl';
         $this->serializer = $serializer ?: ObjectManager::getInstance()->get(Json::class);
+        $this->soapClientFactory = $soapClientFactory ?: ObjectManager::getInstance()->get(ClientFactory::class);
     }
 
     /**
@@ -227,7 +235,7 @@ public function __construct(
      */
     protected function _createSoapClient($wsdl, $trace = false)
     {
-        $client = new \SoapClient($wsdl, ['trace' => $trace]);
+        $client = $this->soapClientFactory->create($wsdl, ['trace' => $trace]);
         $client->__setLocation(
             $this->getConfigFlag(
                 'sandbox_mode'
@@ -1264,7 +1272,7 @@ protected function _formShipmentRequest(\Magento\Framework\DataObject $request)
             $countriesOfManufacture[] = $product->getCountryOfManufacture();
         }
 
-        $paymentType = $request->getIsReturn() ? 'RECIPIENT' : 'SENDER';
+        $paymentType = $this->getPaymentType($request);
         $optionType = $request->getShippingMethod() == self::RATE_REQUEST_SMARTPOST
             ? 'SERVICE_DEFAULT' : $packageParams->getDeliveryConfirmation();
         $requestClient = [
@@ -1750,4 +1758,18 @@ private function parseDate($timestamp)
 
         return false;
     }
+
+    /**
+     * Defines payment type by request.
+     * Two values are available: RECIPIENT or SENDER.
+     *
+     * @param DataObject $request
+     * @return string
+     */
+    private function getPaymentType(DataObject $request): string
+    {
+        return $request->getIsReturn() && $request->getShippingMethod() !== self::RATE_REQUEST_SMARTPOST
+            ? 'RECIPIENT'
+            : 'SENDER';
+    }
 }

dev/tests/integration/testsuite/Magento/Sales/_files/address_data.php

@@ -6,6 +6,7 @@
 
 return [
     'region' => 'CA',
+    'region_id' => '12',
     'postcode' => '11111',
     'lastname' => 'lastname',
     'firstname' => 'firstname',