magento-test/app/code/Magento/Customer/Test/Mftf/ActionGroup/StorefrontSaveCustomerAddressActionGroup.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="StorefrontSaveCustomerAddressActionGroup">
        <annotations>
            <description>Clicks on the Save Address button. Validates that the Success Message is present.</description>
        </annotations>

        <click selector="{{StorefrontCustomerAddressFormSection.saveAddress}}" stepKey="clickSaveAddress"/>
        <waitForElementVisible selector="{{StorefrontMessagesSection.success}}" stepKey="waitForSuccessMessage"/>
        <see selector="{{StorefrontMessagesSection.success}}" userInput="You saved the address." stepKey="assertSuccessMessage"/>
    </actionGroup>
</actionGroups>