magento-test/app/code/Magento/Customer/Test/Mftf/ActionGroup/SelectDropdownCustomerAddressAttributeValueActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="SelectDropdownCustomerAddressAttributeValueActionGroup">
        <annotations>
            <description>Selects the provided Option in the provided Customer Address Attribute drop down menu. Clicks on Save.</description>
        </annotations>
        <arguments>
            <argument name="customerAddressAttribute"/>
            <argument name="optionValue" type="string"/>
        </arguments>
        <waitForElementVisible selector="{{AdminEditCustomerAddressesSection.dropDownAttribute(customerAddressAttribute.code)}}" stepKey="waitForSelectOption"/>
        <selectOption selector="{{AdminEditCustomerAddressesSection.dropDownAttribute(customerAddressAttribute.code)}}" userInput="{{optionValue}}" stepKey="selectOptionValue"/>
        <click selector="{{AdminEditCustomerAddressesSection.save}}" stepKey="saveAddress"/>
        <waitForPageLoad stepKey="waitForAddressSaved"/>
    </actionGroup>
</actionGroups>