MAGETWO-53194: Impossible change Tax class for NOT LOGGED IN customer group

Author: Oleksandr Karpenko

dev/tests/integration/testsuite/Magento/Customer/Controller/Adminhtml/GroupTest.php

@@ -161,26 +161,17 @@ public function testSaveActionExistingGroup()
         );
     }
 
-    /**
-     * @magentoDataFixture Magento/Customer/_files/customer_group.php
-     */
-    public function testSaveActionExistingGroupWithEmptyGroupCode()
+    public function testSaveActionCreateNewGroup()
     {
-        $groupId = $this->findGroupIdWithCode(self::CUSTOMER_GROUP_CODE);
-        $originalCode = $this->groupRepository->getById($groupId)->getCode();
-
         $this->getRequest()->setParam('tax_class', self::TAX_CLASS_ID);
-        $this->getRequest()->setParam('id', $groupId);
-        $this->getRequest()->setParam('code', '');
+        $this->getRequest()->setParam('code', 'group_code');
 
         $this->dispatch('backend/customer/group/save');
 
         $this->assertSessionMessages(
-            $this->equalTo(['code is a required field.']),
-            MessageInterface::TYPE_ERROR
+            $this->equalTo(['You saved the customer group.']),
+            MessageInterface::TYPE_SUCCESS
         );
-        $this->assertSessionMessages($this->isEmpty(), MessageInterface::TYPE_SUCCESS);
-        $this->assertEquals($originalCode, $this->groupRepository->getById($groupId)->getCode());
     }
 
     public function testSaveActionForwardNewCreateNewGroup()