magento-test/app/code/Magento/Shipping/Test/Mftf/ActionGroup/SubmitShipmentIntoOrderActionGroup.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="SubmitShipmentIntoOrderActionGroup">
        <annotations>
            <description>Clicks on the 'Submit Shipment' button on the view Admin Order Shipment page. Validates that the URL and Page Title are present and correct.</description>
        </annotations>

        <click selector="{{AdminShipmentMainActionsSection.submitShipment}}" stepKey="clickSubmitShipment"/>
        <seeInCurrentUrl url="{{AdminOrderDetailsPage.url}}" stepKey="seeViewOrderPageShipping"/>
        <see selector="{{AdminOrderDetailsMessagesSection.successMessage}}" userInput="The shipment has been created." stepKey="seeShipmentCreateSuccess"/>
    </actionGroup>
</actionGroups>