MC-17275: Admin Down after changing store domain/cookie

Author: nikita-shcherbatykh

app/code/Magento/Backend/Test/Mftf/Test/AdminLoginAfterChangeCookieDomainTest.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
+    <test name="AdminLoginAfterChangeCookieDomainTest">
+        <annotations>
+            <features value="Backend"/>
+            <stories value="Login on the Admin Backend"/>
+            <title value="Admin user can login after changing cookie domain on main website scope without changing cookie domain on default scope"/>
+            <description value="Admin user can login after changing cookie domain on main website scope without changing cookie domain on default scope"/>
+            <severity value="CRITICAL"/>
+            <testCaseId value="MC-17847"/>
+            <useCaseId value="MC-17275"/>
+            <group value="backend"/>
+        </annotations>
+        <before>
+            <magentoCLI command="config:set web/cookie/cookie_domain --scope=website --scope-code=base testDomain.com" stepKey="changeDomainForMainWebsite"/>
+            <magentoCLI command="cache:flush" stepKey="flushCache"/>
+        </before>
+        <after>
+            <magentoCLI command="config:set web/cookie/cookie_domain --scope=website --scope-code=base ''" stepKey="changeDomainForMainWebsite"/>
+            <magentoCLI command="cache:flush" stepKey="flushCache"/>
+        </after>
+        <actionGroup ref="LoginAsAdmin" stepKey="loginAsAdmin"/>
+        <actionGroup ref="AssertAdminDashboardPageIsVisibleActionGroup" stepKey="seeDashboardPage"/>
+        <actionGroup ref="logout" stepKey="logoutFromAdmin"/>
+    </test>
+</tests>