NTR - Added doctrine uuid test case

tests/integration/DoctrineUuidTest.php

@@ -0,0 +1,28 @@
+<?php declare(strict_types=1);
+
+namespace Swag\Braintree\Tests\Integration;
+
+use Swag\Braintree\Entity\ConfigEntity;
+
+class DoctrineUuidTest extends SwagBraintreeTestCase
+{
+    public function test(): void
+    {
+        $em = $this->getEntityManager();
+
+        $shop = $this->createShop();
+        $config = (new ConfigEntity())
+            ->setShop($shop);
+
+        $em->persist($config);
+        $em->flush();
+
+        static::assertNotNull($config->getId());
+        $id = clone $config->getId();
+
+        $em->persist($config);
+        $em->flush();
+
+        static::assertSame((string) $id, (string) $config->getId());
+    }
+}