magento-test/app/code/Magento/SalesRule/Test/Mftf/Section/CheckoutCartSummarySection.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
    <section name="CheckoutCartSummarySection">
        <element name="discountLabel" type="text" selector="//*[@id='cart-totals']//tr[.//th//span[contains(@class, 'discount coupon')]]"/>
        <element name="discountTotal" type="text" selector="//*[@id='cart-totals']//tr[.//th//span[contains(@class, 'discount coupon')]]//td//span//span[@class='price']"/>
    </section>
</sections>