magento-test/app/code/Magento/Newsletter/Test/Mftf/ActionGroup/AssertAdminNewsletterTemplateFormActionGroup.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="AssertAdminNewsletterTemplateFormActionGroup">
        <arguments>
            <argument name="name" type="string"/>
            <argument name="subject" type="string"/>
            <argument name="senderName" type="string"/>
            <argument name="senderEmail" type="string"/>
            <argument name="templateContent" type="string"/>
          </arguments>

        <seeInField stepKey="seeTemplateNameField" userInput="{{name}}" selector="{{BasicFieldNewsletterSection.templateName}}"/>
        <seeInField stepKey="seeTemplateSubjectField" userInput="{{subject}}" selector="{{BasicFieldNewsletterSection.templateSubject}}"/>
        <seeInField stepKey="seeTemplateSenderNameField" userInput="{{senderName}}" selector="{{BasicFieldNewsletterSection.senderName}}"/>
        <seeInField stepKey="seeTemplateSenderEmailField" userInput="{{senderEmail}}" selector="{{BasicFieldNewsletterSection.senderEmail}}"/>
        <seeInField stepKey="seeTemplateContentField" userInput="{{templateContent}}"  selector="{{TinyMCESection.Content}}"/>
    </actionGroup>
</actionGroups>