magento/graphql-ce#271: [My Account] Add support of Customer attributes

- Updating API functional test: adding

Author: furseyev

dev/tests/api-functional/testsuite/Magento/GraphQl/Customer/UpdateCustomerTest.php

@@ -263,6 +263,34 @@ public function testUpdateEmailIfEmailAlreadyExists()
         $this->graphQlQuery($query, [], '', $this->getCustomerAuthHeaders($currentEmail, $currentPassword));
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Customer/_files/customer.php
+     * @expectedException \Exception
+     * @expectedExceptionMessage Required parameters are missing: firstname
+     */
+    public function testEmptyCustomerName()
+    {
+        $currentEmail = '[email protected]';
+        $currentPassword = 'password';
+
+        $query = <<<QUERY
+mutation {
+    updateCustomer(
+        input: {
+            email: "{$currentEmail}"
+            password: "{$currentPassword}"
+            firstname: ""
+        }
+    ) {
+        customer {
+            email
+        }
+    }
+}
+QUERY;
+        $this->graphQlQuery($query, [], '', $this->getCustomerAuthHeaders($currentEmail, $currentPassword));
+    }
+
     /**
      * @param string $email
      * @param string $password