magento-test/app/code/Magento/Search/Test/Mftf/ActionGroup/AdminSetGlobalSearchValueActionGroup.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="AdminSetGlobalSearchValueActionGroup">
        <arguments>
            <argument name="textSearch" type="string" defaultValue=""/>
        </arguments>

        <click selector="{{AdminGlobalSearchSection.globalSearch}}" stepKey="clickSearchBtn"/>
        <waitForElementVisible selector="{{AdminGlobalSearchSection.globalSearchActive}}" stepKey="waitForSearchInputVisible"/>
        <fillField selector="{{AdminGlobalSearchSection.globalSearchInput}}" userInput="{{textSearch}}" stepKey="fillSearch"/>
    </actionGroup>
</actionGroups>