MAGETWO-95770: Saved multi line attribute data displayed incorrectly on customer edit address page

- Fixed multiline customer address attribute data processing for admin

Author: nathanjosiah

app/code/Magento/Customer/Model/Customer/DataProvider.php

@@ -25,6 +25,7 @@
 use Magento\Framework\Session\SessionManagerInterface;
 use Magento\Framework\View\Element\UiComponent\ContextInterface;
 use Magento\Framework\View\Element\UiComponent\DataProvider\FilterPool;
+use Magento\Ui\Component\Form\Element\Multiline;
 use Magento\Ui\Component\Form\Field;
 use Magento\Ui\DataProvider\EavValidationRules;
 
@@ -596,8 +597,14 @@ protected function prepareAddressData($addressId, array &$addresses, array $cust
         ) {
             $addresses[$addressId]['default_shipping'] = $customer['default_shipping'];
         }
-        if (isset($addresses[$addressId]['street']) && !is_array($addresses[$addressId]['street'])) {
-            $addresses[$addressId]['street'] = explode("\n", $addresses[$addressId]['street']);
+
+        foreach ($this->meta['address']['children'] as $attributeName => $attributeMeta) {
+            if ($attributeMeta['arguments']['data']['config']['dataType'] === Multiline::NAME
+                && isset($addresses[$addressId][$attributeName])
+                && !is_array($addresses[$addressId][$attributeName])
+            ) {
+                $addresses[$addressId][$attributeName] = explode("\n", $addresses[$addressId][$attributeName]);
+            }
         }
     }
 

app/code/Magento/Customer/Test/Mftf/Section/AdminCustomerAccountInformationSection.xml

@@ -12,6 +12,7 @@
         <element name="statusInactive" type="button" selector=".admin__actions-switch-label"/>
         <element name="accountInformationTitle" type="text" selector=".admin__page-nav-title"/>
         <element name="accountInformationButton" type="text" selector="//a/span[text()='Account Information']"/>
+        <element name="addressesButton" type="text" selector="//a/span[text()='Addresses']"/>
         <element name="firstName" type="input" selector="input[name='customer[firstname]']"/>
         <element name="lastName" type="input" selector="input[name='customer[lastname]']"/>
         <element name="email" type="input" selector="input[name='customer[email]']"/>