ACP2E-3523: Issue with Default Attribute Option Value Behavior for Multiselect

Author: aplapana

app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Save.php

@@ -271,7 +271,7 @@ public function execute()
             if (array_key_exists('reset_is-default_option', $data) && $data['reset_is-default_option']) {
                 unset($data['reset_is-default_option']);
                 $data['default_value'] = null;
-            } elseif(isset($data['default'])) {
+            } elseif (isset($data['default'])) {
                 $data['default_value'] = implode(",", $data['default']);
             }
 

app/code/Magento/Catalog/Test/Mftf/Test/CreateProductAttributeEntityTest/CreateProductAttributeEntityMultiSelectTest.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
- /**
-  * Copyright © Magento, Inc. All rights reserved.
-  * See COPYING.txt for license details.
-  */
+/**
+ * Copyright 2024 Adobe
+ * All Rights Reserved.
+ */
 -->
 <tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
@@ -53,7 +53,7 @@
             <argument name="frontName" value="{{multiselectProductAttribute.option1_frontend}}"/>
             <argument name="row" value="1"/>
         </actionGroup>
-        <actionGroup ref="CreateAttributeDropdownNthOptionActionGroup" stepKey="createOption2">
+        <actionGroup ref="CreateAttributeDropdownNthOptionAsDefaultActionGroup" stepKey="createOption2">
             <argument name="adminName" value="{{multiselectProductAttribute.option2_admin}}"/>
             <argument name="frontName" value="{{multiselectProductAttribute.option2_frontend}}"/>
             <argument name="row" value="2"/>
@@ -80,7 +80,7 @@
         <dontSeeCheckboxIsChecked stepKey="dontSeeOption1Default" selector="{{AttributePropertiesSection.dropdownNthOptionIsDefault('1')}}"/>
         <seeInField stepKey="seeOption2Admin" selector="{{AttributePropertiesSection.dropdownNthOptionAdmin('2')}}" userInput="{{multiselectProductAttribute.option2_admin}}"/>
         <seeInField stepKey="seeOption2StoreView" selector="{{AttributePropertiesSection.dropdownNthOptionDefaultStoreView('2')}}" userInput="{{multiselectProductAttribute.option2_frontend}}"/>
-        <dontSeeCheckboxIsChecked stepKey="dontSeeOption2Default" selector="{{AttributePropertiesSection.dropdownNthOptionIsDefault('2')}}"/>
+        <seeCheckboxIsChecked stepKey="dontSeeOption2Default" selector="{{AttributePropertiesSection.dropdownNthOptionIsDefault('2')}}"/>
         <seeInField stepKey="seeOption3Admin" selector="{{AttributePropertiesSection.dropdownNthOptionAdmin('3')}}" userInput="{{multiselectProductAttribute.option3_admin}}"/>
         <seeInField stepKey="seeOption3StoreView" selector="{{AttributePropertiesSection.dropdownNthOptionDefaultStoreView('3')}}" userInput="{{multiselectProductAttribute.option3_frontend}}"/>
         <seeCheckboxIsChecked stepKey="seeOption3Default" selector="{{AttributePropertiesSection.dropdownNthOptionIsDefault('3')}}"/>