magento-test/app/code/Magento/Sales/Test/Mftf/ActionGroup/FillOrderCustomerInformationActionGroup.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="FillOrderCustomerInformationActionGroup">
        <annotations>
            <description>Fills in the provided Customer and Address details on the Admin 'Create New Order for' page.</description>
        </annotations>
        <arguments>
            <argument name="customer"/>
            <argument name="address"/>
        </arguments>

        <fillField selector="{{AdminOrderFormBillingAddressSection.FirstName}}" userInput="{{customer.firstname}}" stepKey="fillFirstName"/>
        <fillField selector="{{AdminOrderFormBillingAddressSection.LastName}}" userInput="{{customer.lastname}}" stepKey="fillLastName"/>
        <fillField selector="{{AdminOrderFormBillingAddressSection.StreetLine1}}" userInput="{{address.street[0]}}" stepKey="fillStreetLine1"/>
        <fillField selector="{{AdminOrderFormBillingAddressSection.City}}" userInput="{{address.city}}" stepKey="fillCity"/>
        <selectOption selector="{{AdminOrderFormBillingAddressSection.Country}}" userInput="{{address.country_id}}" stepKey="fillCountry"/>
        <selectOption selector="{{AdminOrderFormBillingAddressSection.State}}" userInput="{{address.state}}" stepKey="fillState"/>
        <fillField selector="{{AdminOrderFormBillingAddressSection.PostalCode}}" userInput="{{address.postcode}}" stepKey="fillPostalCode"/>
        <fillField selector="{{AdminOrderFormBillingAddressSection.Phone}}" userInput="{{address.telephone}}" stepKey="fillPhone"/>
    </actionGroup>
</actionGroups>