MC-4538: Convert RegisterCustomerFrontendEntityTest to MFTF

- Addressing review comments

Author: sapanathakur

app/code/Magento/Customer/Test/Mftf/ActionGroup/SignUpNewUserFromStorefrontActionGroup.xml

@@ -40,7 +40,13 @@
         <fillField  stepKey="fillConfirmPassword" userInput="{{customer.password}}" selector="{{StorefrontCustomerCreateFormSection.confirmPasswordField}}"/>
         <click stepKey="clickCreateAccountButton" selector="{{StorefrontCustomerCreateFormSection.createAccountButton}}"/>
         <waitForPageLoad stepKey="waitForCreateAccountButtonToLoad" />
-        <see stepKey="seeThankYouMessage" userInput="Thank you for registering with Main Website Store."/>
+    </actionGroup>
+    <actionGroup name="AssertSignedUpNewsletterActionGroup">
+        <arguments>
+            <argument name="customer" defaultValue="CustomerEntityOne"/>
+            <argument name="storeName" defaultValue="Main Website" type="string"/>
+        </arguments>
+        <see stepKey="successMessage" userInput="Thank you for registering with {{storeName}} Store." selector="{{AdminCustomerMessagesSection.successMessage}}"/>
         <see stepKey="seeFirstName" userInput="{{customer.firstname}}" selector="{{StorefrontCustomerDashboardAccountInformationSection.ContactInformation}}" />
         <see stepKey="seeLastName" userInput="{{customer.lastname}}" selector="{{StorefrontCustomerDashboardAccountInformationSection.ContactInformation}}" />
         <see stepKey="seeEmail" userInput="{{customer.email}}" selector="{{StorefrontCustomerDashboardAccountInformationSection.ContactInformation}}" />

app/code/Magento/Customer/Test/Mftf/Test/AdminCreateNewCustomerOnStorefrontTest.xml

@@ -29,10 +29,12 @@
             <actionGroup ref="logout" stepKey="logout"/>
         </after>
 
-        <!--Create new customer on storefront-->
-        <actionGroup ref="SignUpNewUserFromStorefrontActionGroup" stepKey="SignUpNewUser">
-            <argument name="Customer" value="CustomerEntityOne"/>
+        <!--Create new customer on storefront and perform the asserts-->
+        <actionGroup ref="SignUpNewUserFromStorefrontActionGroup" stepKey="signUpNewUser">
+            <argument name="customer" value="CustomerEntityOne"/>
+        </actionGroup>
+        <actionGroup ref="AssertSignedUpNewsletterActionGroup" stepKey="assertSignedUpNewsLetter">
+            <argument name="customer" value="CustomerEntityOne"/>
         </actionGroup>
-        <seeInCurrentUrl url="{{StorefrontCustomerDashboardPage.url}}" stepKey="seeAssertInCurrentUrl"/>
     </test>
 </tests>