magento-test/app/code/Magento/Checkout/Test/Mftf/ActionGroup/StorefrontCheckThatCartIsEmptyActionGroup.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="StorefrontCheckThatCartIsEmptyActionGroup">
        <annotations>
            <description>Clicks on the Mini Shopping Cart icon in the Storefront Header. Validates that the 'Empty Cart' message is present and correct.</description>
        </annotations>

        <click selector="{{StorefrontMinicartSection.showCart}}" stepKey="clickOnMiniCart"/>
        <see selector="{{StorefrontMinicartSection.messageEmptyCart}}" userInput="You have no items in your shopping cart." stepKey="seeNoItemsInShoppingCart"/>
    </actionGroup>
</actionGroups>