magento-test/app/code/Magento/Search/Test/Mftf/ActionGroup/AdminFillNewSearchSynonymsActionGroup.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="AdminFillNewSearchSynonymsActionGroup">
        <annotations>
            <description>Fills the search synonyms form field.</description>
        </annotations>
        <arguments>
            <argument name="scope_id" type="string"/>
            <argument name="synonyms" type="string"/>
        </arguments>

        <selectOption selector="{{AdminSearchSynonymsNewSection.scope}}" userInput="{{scope_id}}" stepKey="selectScope"/>
        <fillField selector="{{AdminSearchSynonymsNewSection.synonyms}}" userInput="{{synonyms}}" stepKey="fillSynonyms"/>
        <checkOption selector="{{AdminSearchSynonymsNewSection.merge}}" stepKey="checkCheckbox"/>
    </actionGroup>
</actionGroups>