magento-test/app/code/Magento/Swatches/Test/Mftf/ActionGroup/StorefrontAssertSwatchOptionPriceActionGroup.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="StorefrontAssertSwatchOptionPriceActionGroup">
        <arguments>
            <argument name="optionName" type="string"/>
            <argument name="optionPrice" type="string"/>
        </arguments>
        <click selector="{{StorefrontProductInfoMainSection.swatchOptionByLabel(optionName)}}" stepKey="clickOnOption"/>
        <see userInput="{{optionPrice}}" selector="{{StorefrontProductInfoMainSection.productPrice}}" stepKey="seeOptionPrice"/>
    </actionGroup>
</actionGroups>