magento-test/app/code/Magento/Customer/Test/Mftf/ActionGroup/AssertAdminCustomerDateOfBirthValidationMessageActionGroup.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="AssertAdminCustomerDateOfBirthValidationMessageActionGroup">
        <annotations>
            <description>Fills 'Date of Birth' input with provided 'dob' value, clicks 'save' button, checks
                there is no provided validation error message for the 'Date of Birth' input on the page.</description>
        </annotations>
        <arguments>
            <argument name="message" type="string" defaultValue="The Date of Birth should not be greater than today."/>
            <argument name="dob" type="string" defaultValue="15/01/1970"/>
        </arguments>

        <fillField userInput="{{dob}}" selector="{{AdminCustomerAccountInformationSection.dateOfBirth}}" stepKey="fillDateOfBirth"/>
        <click selector="{{AdminCustomerMainActionsSection.saveButton}}" stepKey="saveCustomer"/>
        <dontSee selector="{{AdminCustomerAccountInformationSection.dateOfBirthValidationErrorField}}" userInput="{{message}}" stepKey="seeTheErrorMessageIsDisplayed"/>
    </actionGroup>
</actionGroups>