ENGCOM-2629: Added checks to see if the payment is available #15683

Author: nmalevanec

app/code/Magento/Payment/Observer/SalesOrderBeforeSaveObserver.php

@@ -15,13 +15,20 @@ class SalesOrderBeforeSaveObserver implements ObserverInterface
      *
      * @param \Magento\Framework\Event\Observer $observer
      * @return $this
+     * @throws \Magento\Framework\Exception\LocalizedException in case order has no payment specified.
      */
     public function execute(\Magento\Framework\Event\Observer $observer)
     {
         /** @var \Magento\Sales\Model\Order $order */
         $order = $observer->getEvent()->getOrder();
 
-        if ($order->getPayment() && $order->getPayment()->getMethodInstance()->getCode() != 'free') {
+        if (!$order->getPayment()) {
+            throw new \Magento\Framework\Exception\LocalizedException(
+                __('Please provide payment for the order.')
+            );
+        }
+
+        if ($order->getPayment()->getMethodInstance()->getCode() != 'free') {
             return $this;
         }
 

app/code/Magento/Payment/Test/Unit/Observer/SalesOrderBeforeSaveObserverTest.php

@@ -158,6 +158,9 @@ public function testSalesOrderBeforeSaveSetForced()
 
     /**
      * The method should check that the payment is available, as this is not always the case.
+     *
+     * @expectedException \Magento\Framework\Exception\LocalizedException
+     * @exceptedExceptionMessage Please provide payment for the order.
      */
     public function testDoesNothingWhenNoPaymentIsAvailable()
     {