magento-test/app/code/Magento/MediaGalleryUi/Test/Mftf/ActionGroup/AdminOpenMediaGalleryFromTinyMceIconActionGroup.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="AdminOpenMediaGalleryTinyMceActionGroup">
        <annotations>
            <description>Opens Enhanced MediaGallery from category page by tinyMCE image button</description>
        </annotations>

        <conditionalClick selector="{{AdminCategoryContentSection.sectionHeader}}" dependentSelector="{{AdminCategoryContentSection.uploadButton}}" visible="false" stepKey="clickExpandContent"/>
        <waitForElementVisible selector="{{TinyMCESection.TinyMCE}}" stepKey="waitForTinyMCE" />
        <click selector="{{TinyMCESection.InsertImageIcon}}" stepKey="clickInsertImageIcon" />
        <waitForPageLoad stepKey="waitForPageLoad" />
        <click selector="{{MediaGallerySection.Browse}}" stepKey="clickBrowse"/>
        <waitForPageLoad stepKey="waitForPopup"/>
    </actionGroup>
</actionGroups>