magento-test/app/code/Magento/Sales/Test/Mftf/ActionGroup/SubmitInvoiceActionGroup.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="SubmitInvoiceActionGroup">
        <annotations>
            <description>Clicks on 'Submit Invoice' on the Admin 'New Invoice' page. Validates that the Success Message is present and correct. Validates that the Order ID appears in the URL.</description>
        </annotations>

        <click selector="{{AdminInvoiceMainActionsSection.submitInvoice}}" stepKey="clickSubmitInvoice"/>
        <waitForElementVisible selector="{{AdminMessagesSection.success}}" stepKey="waitForMessageAppears"/>
        <see selector="{{AdminMessagesSection.success}}" userInput="The invoice has been created." stepKey="seeInvoiceCreateSuccess"/>
        <grabFromCurrentUrl regex="~/order_id/(\d+)/~" stepKey="grabOrderId"/>
        <seeInCurrentUrl url="{{AdminOrderDetailsPage.url('$grabOrderId')}}" stepKey="seeViewOrderPageInvoice"/>
    </actionGroup>
</actionGroups>