Add check for not sending emails when refund validation fails

features/having_credit_memo_sent_to_customer.feature

@@ -15,9 +15,16 @@ Feature: Having credit memo sent to customer
         And I am logged in as an administrator
         And the order "#00000022" is already paid
 
-    @application
+    @application @email
     Scenario: Having credit memo file sent to a customer
         When I want to refund some units of order "#00000022"
         And I decide to refund 1st "Mr. Meeseeks T-Shirt" product with "Space money" payment
         Then I should be notified that selected order units have been successfully refunded
         And email to "[email protected]" with credit memo should be sent
+
+    @ui @email
+    Scenario: Not sending email with credit memo if the refund validation fails
+        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 email to "[email protected]" with credit memo should not be sent

tests/Behat/Context/Application/RefundingContext.php

@@ -294,7 +294,7 @@ public function shouldBeAbleToRefundUnitWithProduct(
      */
     public function emailToWithCreditMemoShouldBeSent(string $email): void
     {
-        $this->emailChecker->hasMessageTo('Some of the units from your order have been refunded.', $email);
+        Assert::true($this->emailChecker->hasMessageTo('Some of the units from your order have been refunded.', $email));
     }
 
     /**

tests/Behat/Context/Ui/RefundingContext.php

@@ -8,6 +8,8 @@
 use FriendsOfBehat\PageObjectExtension\Page\UnexpectedPageException;
 use Sylius\Behat\NotificationType;
 use Sylius\Behat\Service\NotificationCheckerInterface;
+use Sylius\Component\Core\Test\Services\EmailCheckerInterface;
+use Symfony\Component\Finder\Exception\DirectoryNotFoundException;
 use Tests\Sylius\RefundPlugin\Behat\Page\Admin\OrderRefundsPageInterface;
 use Webmozart\Assert\Assert;
 
@@ -19,12 +21,17 @@ final class RefundingContext implements Context
     /** @var NotificationCheckerInterface */
     private $notificationChecker;
 
+    /** @var EmailCheckerInterface */
+    private $emailChecker;
+
     public function __construct(
         OrderRefundsPageInterface $orderRefundsPage,
-        NotificationCheckerInterface $notificationChecker
+        NotificationCheckerInterface $notificationChecker,
+        EmailCheckerInterface $emailChecker
     ) {
         $this->orderRefundsPage = $orderRefundsPage;
         $this->notificationChecker = $notificationChecker;
+        $this->emailChecker = $emailChecker;
     }
 
     /**
@@ -339,6 +346,17 @@ public function theSelectedRefundPaymentMethodShouldBe(string $paymentMethod): v
         Assert::true($this->orderRefundsPage->isPaymentMethodSelected($paymentMethod));
     }
 
+    /**
+     * @Then email to :email with credit memo should not be sent
+     */
+    public function emailToWithCreditMemoShouldNotBeSent(string $email): void
+    {
+        try {
+            Assert::false($this->emailChecker->hasMessageTo('Some of the units from your order have been refunded.', $email));
+        } catch (DirectoryNotFoundException $exception) {
+        }
+    }
+
     private function provideLongComment(): string
     {
         return 'Tu ne quaesieris scire nefas, quem mihi quem tibi finem di dederint, Leuconoe, nec Babylonios temptaris numeros. Ut melius quidquid erit pati. Seu plures hiemes sue tribuit Iuppiter ultimam. Qae nunc oppositis debilitat pumicibus mare Tyrrenum: sapias vina liques et spatio brevi. Spem longam resecens. Dum loquimur fugerit invida Aetas: CARPE DIEM, quam minimum credula postero.';

tests/Behat/Resources/services.xml

@@ -49,6 +49,7 @@
         <service id="Tests\Sylius\RefundPlugin\Behat\Context\Ui\RefundingContext">
             <argument type="service" id="Tests\Sylius\RefundPlugin\Behat\Page\Admin\OrderRefundsPage" />
             <argument type="service" id="sylius.behat.notification_checker" />
+            <argument type="service" id="sylius.behat.email_checker" />
         </service>
 
         <service id="Tests\Sylius\RefundPlugin\Behat\Context\Ui\CreditMemoContext">