magento-test/app/code/Magento/Cms/Test/Mftf/ActionGroup/SearchBlockOnGridPageActionGroup/SearchBlockOnGridPageActionGroup.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="searchBlockOnGridPage">
        <annotations>
            <description>Searches the Admin CMS Blocks grid based on the provided Block.</description>
        </annotations>
        <arguments>
            <argument name="Block" defaultValue=""/>
        </arguments>

        <fillField selector="//input[@name='chooser_identifier']" userInput="{{Block.identifier}}" stepKey="fillEntityIdentifier"/>
        <click selector="//div[@class='modal-inner-wrap']//button[@title='Search']" stepKey="clickSearchBtn"/>
        <waitForLoadingMaskToDisappear stepKey="waitForSecondIdSortDescendingToFinish2"/>
        <waitForElementVisible selector="{{WidgetSection.BlockPage(Block.identifier)}}" stepKey="waitForBlockTitle"/>
    </actionGroup>
</actionGroups>