magento-test/app/code/Magento/Multishipping/Test/Mftf/ActionGroup/AssertStorefrontSalesOrderMatchesGrandTotalActionGroup.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="AssertStorefrontSalesOrderMatchesGrandTotalActionGroup">
        <arguments>
            <argument name="dataHref" type="string"/>
        </arguments>
        <!--Click on View Order Link-->
        <click selector="{{StorefrontSalesOrderSection.viewOrderLink(dataHref)}}" stepKey="viewOrderAction"/>
        <waitForPageLoad stepKey="waitForViewOrderPageToLoad"/>
        <grabTextFrom selector="{{StorefrontSalesOrderSection.salesOrderPrice('subtotal')}}" stepKey="grabValueForSubtotal"/>
        <grabTextFrom selector="{{StorefrontSalesOrderSection.salesOrderPrice('shipping')}}" stepKey="grabValueForShippingHandling"/>
        <grabTextFrom selector="{{StorefrontSalesOrderSection.salesOrderPrice('grand_total')}}" stepKey="grabValueForGrandTotal"/>
        <executeJS function="
        var grandTotal = '{$grabValueForGrandTotal}'.substr(1);
        return (grandTotal);" stepKey="grandTotalValue"/>
        <executeJS function="
               var subtotal = '{$grabValueForSubtotal}'.substr(1);
               var handling = '{$grabValueForShippingHandling}'.substr(1);
               var subtotalHandling = (parseFloat(subtotal) + parseFloat(handling)).toFixed(2);
               return (subtotalHandling);" stepKey="sumTotalValue"/>
        <assertEquals stepKey="assertSubTotalPrice">
            <expectedResult type="variable">$sumTotalValue</expectedResult>
            <actualResult type="variable">$grandTotalValue</actualResult>
        </assertEquals>
    </actionGroup>
</actionGroups>