magento-test/app/code/Magento/Indexer/Test/Mftf/ActionGroup/AdminReindexAndFlushCacheActionGroup.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="AdminReindexAndFlushCache">
        <annotations>
            <!--
                PLEASE NOTE:
                The action group runs commands to reindex ALL indexers and to flush ALL cache types.
                It's better to specify needed index (for reindexing) / cache type (for cache flushing).
                Please use the following action groups:
                - CliIndexerReindexActionGroup - run reindex by CLI with specified indexers
                - CliCacheCleanActionGroup - run cache:clean by CLI with specified cache tags
                - CliCacheFlushActionGroup - run cache:flush by CLI with specified cache tags
             -->
            <description>Run reindex and flush cache.</description>
        </annotations>

        <magentoCLI command="indexer:reindex" stepKey="reindex"/>
        <magentoCLI command="cache:flush" stepKey="flushCache"/>
    </actionGroup>
</actionGroups>