magento-test/app/code/Magento/Review/Test/Mftf/ActionGroup/AdminDeleteReviewsByUserNicknameActionGroup.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="AdminDeleteReviewsByUserNicknameActionGroup">
        <arguments>
            <argument name="nickname" type="string" defaultValue="{{simpleProductReview.nickname}}"/>
        </arguments>
        <fillField selector="{{AdminReviewGridSection.nickname}}" userInput="{{nickname}}" stepKey="fillNickname"/>
        <click selector="{{AdminDataGridHeaderSection.applyFilters}}" stepKey="clickApplyFilters"/>
        <selectOption selector="{{AdminReviewGridSection.massActions}}" userInput="selectAll" stepKey="selectAll"/>
        <selectOption selector="{{AdminReviewGridSection.massActionsSelect}}" userInput="delete" stepKey="clickDeleteActionDropdown"/>
        <click selector="{{AdminReviewGridSection.submit}}" stepKey="clickSubmit"/>
        <waitForElementVisible selector="{{AdminReviewGridSection.acceptModal}}" stepKey="waitForModalPopUp"/>
        <click selector="{{AdminReviewGridSection.acceptModal}}" stepKey="confirmProductDelete"/>
        <see selector="{{AdminMessagesSection.success}}" userInput="record(s) have been deleted." stepKey="seeSuccessMessage"/>
    </actionGroup>
</actionGroups>