magento-test/app/code/Magento/Email/Test/Mftf/Data/EmailTemplateData.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<entities xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="urn:magento:mftf:DataGenerator/etc/dataProfileSchema.xsd">
    <entity name="EmailTemplate" type="template">
        <data key="templateName" unique="suffix">Template</data>
        <data key="templateSubject" unique="suffix">Template Subject_</data>
        <data key="templateText" unique="suffix">Template Text_</data>
    </entity>
    <entity name="EmailTemplateWithDirectives" type="template">
        <data key="templateName" unique="suffix">Template</data>
        <data key="templateSubject" unique="suffix">Template Subject_</data>
        <data key="templateText">Template {{var this.template_id}}:{{var this.getData(template_id)}} Text</data>
        <data key="expectedTemplate">Template : Text</data>
    </entity>
</entities>