magento-test/app/code/Magento/Checkout/Test/Mftf/ActionGroup/StorefrontOpenOrderFromSuccessPageActionGroup.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="StorefrontOpenOrderFromSuccessPageActionGroup">
        <annotations>
            <description>Click order number link from checkout success page and check order number on order view page.</description>
        </annotations>
        <arguments>
            <argument name="orderNumber" defaultValue="000000001" type="string"/>
        </arguments>

        <click selector="{{CheckoutSuccessMainSection.orderLinkByOrderNumber(orderNumber)}}" stepKey="clickOrderNumberLink"/>
        <waitForPageLoad stepKey="waitForOrderPageIsLoaded"/>
        <see userInput="Order # {{orderNumber}}" selector="{{StorefrontCustomerOrderViewSection.orderTitle}}" stepKey="assertOrderNumberIsCorrect"/>
    </actionGroup>
</actionGroups>