minor #387 [Behat] Move scenario from Plus (TheMilek)

This PR was merged into the 1.3 branch.

Discussion
----------

| Q               | A
| --------------- | -----
| Branch?         | 1.3 
| Bug fix?        | no
| New feature?    | no


Commits
-------

9d4ec40 [Behat] Move scenario from Plus

Author: GSadee

features/validating_refunding_zero_items.feature

@@ -0,0 +1,23 @@
+@refunds
+Feature: Validating refunding zero items
+    In order not to make mistake during refunding
+    As an Administrator
+    I want not to be able to refund when none of items has been selected
+
+    Background:
+        Given the store operates on a single channel in "United States"
+        And the store has a product "Mr. Meeseeks T-Shirt" priced at "$10.00"
+        And the store allows shipping with "Galaxy Post"
+        And the store allows paying with "Space money"
+        And there is a customer "rick.sanchez@wubba-lubba-dub-dub.com" that placed an order "#00000022"
+        And the customer bought 2 "Mr. Meeseeks T-Shirt" products
+        And the customer chose "Galaxy Post" shipping method to "United States" with "Space money" payment
+        And I am logged in as an administrator
+
+    @ui @email
+    Scenario: Being unable to refund zero items
+        Given the order "#00000022" is already paid
+        When I want to refund some units of order "#00000022"
+        And I refund zero items
+        Then I should be notified that at least one unit should be selected to refund
+        And the customer "rick.sanchez@wubba-lubba-dub-dub.com" should not receive an email that some units have been refunded

tests/Behat/Context/Ui/RefundingContext.php

@@ -357,6 +357,7 @@ public function theSelectedRefundPaymentMethodShouldBe(string $paymentMethod): v
 
     /**
      * @Then email to :email with credit memo should not be sent
+     * @Then the customer :email should not receive an email that some units have been refunded
      */
     public function emailToWithCreditMemoShouldNotBeSent(string $email): void
     {