[Promotion] Add validation of coupon usage limit per customer

features/promotion/managing_coupons/coupon_validation.feature

@@ -2,7 +2,7 @@
 Feature: Coupon validation
     In order to avoid making mistakes when managing a coupon
     As an Administrator
-    I want to be prevented from adding it without specifying required fields
+    I want to be prevented from adding incorrect coupons
 
     Background:
         Given the store operates on a single channel in "United States"
@@ -31,3 +31,14 @@ Feature: Coupon validation
         And I try to add it
         Then I should be notified that coupon usage limit must be at least one
         And there should be 0 coupon related to this promotion
+
+    @ui
+    Scenario: Trying to add a new coupon with per customer usage limit below one
+        When I want to create a new coupon for this promotion
+        And I specify its code as "SANTA2016"
+        And I limit its usage to 30 times
+        And I limit its per customer usage to -1 times
+        And I make it valid until "26.03.2017"
+        And I try to add it
+        Then I should be notified that coupon usage limit per customer must be at least one
+        And there should be 0 coupon related to this promotion

src/Sylius/Behat/Context/Ui/Admin/ManagingPromotionCouponsContext.php

@@ -166,7 +166,7 @@ public function iSpecifyItsAmountAs(?int $amount = null): void
     }
 
     /**
-     * @When I limit its per customer usage to :limit times
+     * @When /^I limit its per customer usage to ([^"]+) times$/
      */
     public function iLimitItsPerCustomerUsageLimitTo(int $limit)
     {
@@ -398,6 +398,17 @@ public function iShouldBeNotifiedThatCouponUsageLimitMustBeAtLeast()
         Assert::same($currentPage->getValidationMessage('usage_limit'), 'Coupon usage limit must be at least 1.');
     }
 
+    /**
+     * @Then I should be notified that coupon usage limit per customer must be at least one
+     */
+    public function iShouldBeNotifiedThatCouponUsageLimitPerCustomerMustBeAtLeast(): void
+    {
+        /** @var CreatePageInterface|UpdatePageInterface $currentPage */
+        $currentPage = $this->currentPageResolver->getCurrentPageWithForm([$this->createPage, $this->updatePage]);
+
+        Assert::same($currentPage->getValidationMessage('per_customer_usage_limit'), 'Coupon usage limit per customer must be at least 1.');
+    }
+
     /**
      * @Then /^(this coupon) should no longer exist in the coupon registry$/
      */

src/Sylius/Behat/Page/Admin/PromotionCoupon/CreatePage.php

@@ -43,7 +43,7 @@ protected function getDefinedElements(): array
             'code' => '#sylius_promotion_coupon_code',
             'expires_at' => '#sylius_promotion_coupon_expiresAt',
             'usage_limit' => '#sylius_promotion_coupon_usageLimit',
-            'usage_limit_per_customer' => '#sylius_promotion_coupon_usageLimit',
+            'per_customer_usage_limit' => '#sylius_promotion_coupon_perCustomerUsageLimit',
         ]);
     }
 }

src/Sylius/Behat/Page/Admin/PromotionCoupon/UpdatePage.php

@@ -49,7 +49,7 @@ protected function getDefinedElements(): array
             'code' => '#sylius_promotion_coupon_code',
             'expires_at' => '#sylius_promotion_coupon_expiresAt',
             'usage_limit' => '#sylius_promotion_coupon_usageLimit',
-            'usage_limit_per_customer' => '#sylius_promotion_coupon_usageLimit',
+            'per_customer_usage_limit' => '#sylius_promotion_coupon_perCustomerUsageLimit',
         ]);
     }
 }

src/Sylius/Bundle/CoreBundle/Resources/config/validation/PromotionCoupon.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+
+ This file is part of the Sylius package.
+
+ (c) Paweł Jędrzejewski
+
+ For the full copyright and license information, please view the LICENSE
+ file that was distributed with this source code.
+
+-->
+
+<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/services/constraint-mapping-1.0.xsd">
+    <class name="Sylius\Component\Core\Model\PromotionCoupon">
+        <property name="perCustomerUsageLimit">
+            <constraint name="Range">
+                <option name="min">1</option>
+                <option name="minMessage">sylius.promotion_coupon.per_customer_usage_limit.min</option>
+                <option name="groups">sylius</option>
+            </constraint>
+        </property>
+    </class>
+</constraint-mapping>

src/Sylius/Bundle/CoreBundle/Resources/translations/validators.en.yml

@@ -73,6 +73,9 @@ sylius:
             invalid: Depth must be a number.
         channel_pricing:
             all_defined: 'You must define price for every channel.'
+    promotion_coupon:
+        per_customer_usage_limit:
+            min: Coupon usage limit per customer must be at least {{ limit }}.
     product_translation:
         short_description:
             max: Short description must not be longer then {{ limit }} characters.