ACP2E-2990: Customer "created_at" date Not Converted to store time zone upon export

 - Fixed the CR comments.

Author: devarul

app/code/Magento/CustomerImportExport/Model/Export/Customer.php

@@ -21,23 +21,23 @@ class Customer extends \Magento\ImportExport\Model\Export\Entity\AbstractEav
      * Names that begins with underscore is not an attribute. This name convention is for
      * to avoid interference with same attribute name.
      */
-    const COLUMN_EMAIL = 'email';
+    private const COLUMN_EMAIL = 'email';
 
-    const COLUMN_WEBSITE = '_website';
+    private const COLUMN_WEBSITE = '_website';
 
-    const COLUMN_STORE = '_store';
+    private const COLUMN_STORE = '_store';
 
     private const COLUMN_CREATED_AT = 'created_at';
 
     /**
-     * Attribute collection name
+     * A constant declaration for attribute collection name
      */
-    const ATTRIBUTE_COLLECTION_NAME = \Magento\Customer\Model\ResourceModel\Attribute\Collection::class;
+    private const ATTRIBUTE_COLLECTION_NAME = \Magento\Customer\Model\ResourceModel\Attribute\Collection::class;
 
     /**
      * XML path to page size parameter
      */
-    const XML_PATH_PAGE_SIZE = 'export/customer_page_size/customer';
+    private const XML_PATH_PAGE_SIZE = 'export/customer_page_size/customer';
 
     /**
      * @var array
@@ -141,7 +141,7 @@ protected function _getEntityCollection()
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     protected function _getHeaderColumns()
     {
@@ -161,7 +161,7 @@ public function exportItem($item)
         $row[self::COLUMN_WEBSITE] = $this->_websiteIdToCode[$item->getWebsiteId()];
         $row[self::COLUMN_STORE] = $this->_storeIdToCode[$item->getStoreId()];
         $row[self::COLUMN_CREATED_AT] = $this->_localeDate->formatDate(
-            $row[self::COLUMN_CREATED_AT],
+            $item->getCreatedAt(),
             \IntlDateFormatter::MEDIUM,
             true
         );

dev/tests/integration/testsuite/Magento/CustomerImportExport/Model/Export/CustomerTest.php

@@ -17,6 +17,7 @@
 use Magento\Customer\Model\Customer as CustomerModel;
 use Magento\Customer\Model\ResourceModel\Attribute\Collection;
 use Magento\Customer\Model\ResourceModel\Customer\Collection as CustomerCollection;
+use Magento\Framework\Stdlib\DateTime\TimezoneInterface;
 
 /**
  * Tests for customer export model.
@@ -50,6 +51,11 @@ class CustomerTest extends \PHPUnit\Framework\TestCase
      */
     private $attributeCollection;
 
+    /**
+     * @var TimezoneInterface
+     */
+    private $localeDate;
+
     /**
      * @inheritdoc
      */
@@ -58,6 +64,7 @@ protected function setUp(): void
         $this->objectManager = Bootstrap::getObjectManager();
         $this->_model = $this->objectManager->create(Customer::class);
         $this->attributeCollection = $this->objectManager->create(Collection::class);
+        $this->localeDate = $this->objectManager->create(TimezoneInterface::class);
     }
 
     /**
@@ -153,6 +160,11 @@ private function checkExportData(array $lines, array $expectedAttributes): void
         $customers = $this->objectManager->create(CustomerCollection::class);
         foreach ($customers as $customer) {
             $data = $this->processCustomerData($customer, $expectedAttributes);
+            $data['created_at'] = $this->localeDate->formatDate(
+                $data['created_at'],
+                \IntlDateFormatter::MEDIUM,
+                true
+            );
             $exportData = $lines['data'][$data['email']];
             $exportData = $this->unsetDuplicateData($exportData);