magento-test/app/code/Magento/Tax/Test/Mftf/ActionGroup/AssertStorefrontCheckoutCartTaxAmountActionGroup.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="AssertStorefrontCheckoutCartTaxAmountActionGroup">
        <annotations>
            <description>Check tax summary data in Summary section of shopping cart on storefront</description>
        </annotations>
        <arguments>
            <argument name="taxAmount" type="string" defaultValue="$0.83"/>
            <argument name="rate" type="string" defaultValue="US-CA-*-Rate 1 (8.25%)"/>
        </arguments>

        <see selector="{{CheckoutCartSummarySection.taxAmount}}" userInput="{{taxAmount}}" stepKey="checkTaxAmount" />
        <scrollTo selector="{{CheckoutCartSummarySection.taxSummary}}" stepKey="scrollToTaxSummary" />
        <conditionalClick selector="{{CheckoutCartSummarySection.taxSummary}}" dependentSelector="{{CheckoutCartSummarySection.rate}}" visible="false" stepKey="expandTaxSummary"/>
        <see selector="{{CheckoutCartSummarySection.rate}}" userInput="{{rate}}" stepKey="checkRate" />
    </actionGroup>
</actionGroups>