Issue-25968 - Added additional checking for returning needed variable type

Author: a.chorniy

app/code/Magento/Sales/Model/Order/Item.php

@@ -1319,7 +1319,13 @@ public function getParentItemId()
      */
     public function getPrice()
     {
-        return $this->getData(OrderItemInterface::PRICE);
+        $price = $this->getData(OrderItemInterface::PRICE);
+
+        if ($price === null) {
+            return $price;
+        }
+
+        return (float) $price;
     }
 
     /**

app/code/Magento/Sales/Test/Unit/Model/Order/ItemTest.php

@@ -348,4 +348,22 @@ public function getItemQtyVariants()
             ]
         ];
     }
+
+    /**
+     * Test getPrice() method
+     */
+    public function testGetPrice()
+    {
+        $price = 9.99;
+        $this->model->setPrice($price);
+        $this->assertEquals($price, $this->model->getPrice());
+
+        $newPrice = 5.53;
+        $this->model->setData(\Magento\Sales\Api\Data\OrderItemInterface::PRICE, $newPrice);
+        $this->assertEquals($newPrice, $this->model->getPrice());
+
+        $nullablePrice = null;
+        $this->model->setPrice($nullablePrice);
+        $this->assertEquals($nullablePrice, $this->model->getPrice());
+    }
 }