MC-30925: Customer group API update

- Fixed test coverae for group API

Author: Hwashiang Yu

dev/tests/api-functional/testsuite/Magento/Customer/Api/AccountManagementMeTest.php

@@ -16,6 +16,8 @@
 /**
  * Class AccountManagementMeTest
  *
+ * Tests involving the customer modifying their user information via web API.
+ *
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  * @magentoApiDataFixture Magento/Customer/_files/customer.php
  * @magentoApiDataFixture Magento/Customer/_files/customer_two_addresses.php
@@ -144,13 +146,14 @@ public function testUpdateCustomer()
     {
         $customerData = $this->_getCustomerData($this->customerData[CustomerInterface::ID]);
         $lastName = $customerData->getLastname();
-
+        $groupID = $customerData->getGroupId();
         $updatedCustomerData = $this->dataObjectProcessor->buildOutputDataArray(
             $customerData,
             \Magento\Customer\Api\Data\CustomerInterface::class
         );
         $updatedCustomerData[CustomerInterface::LASTNAME] = $lastName . 'Updated';
         $updatedCustomerData[CustomerInterface::ID] = 25;
+        $updatedCustomerData[CustomerInterface::GROUP_ID] = $groupID . 1;
 
         $serviceInfo = [
             'rest' => [
@@ -172,6 +175,7 @@ public function testUpdateCustomer()
 
         $customerData = $this->_getCustomerData($this->customerData[CustomerInterface::ID]);
         $this->assertEquals($lastName . "Updated", $customerData->getLastname());
+        $this->assertEquals($groupID, $customerData->getGroupId());
     }
 
     public function testGetCustomerData()

dev/tests/api-functional/testsuite/Magento/Customer/Api/CustomerRepositoryTest.php

@@ -268,7 +268,6 @@ public function testUpdateCustomer()
         $customerData = $this->_createCustomer();
         $existingCustomerDataObject = $this->_getCustomerData($customerData[Customer::ID]);
         $lastName = $existingCustomerDataObject->getLastname();
-        $expectedGroupID = $existingCustomerDataObject->getGroupId();
         $customerData[Customer::LASTNAME] = $lastName . 'Updated';
         $newCustomerDataObject = $this->customerDataFactory->create();
         $this->dataObjectHelper->populateWithArray(
@@ -297,12 +296,8 @@ public function testUpdateCustomer()
         $this->assertTrue($response !== null);
 
         //Verify if the customer is updated
-        $updatedCustomerDataObject = $this->_getCustomerData($customerData[Customer::ID]);
-        $this->assertEquals(
-            $updatedCustomerDataObject->getGroupId(),
-            $expectedGroupID
-        );
-        $this->assertEquals($lastName . "Updated", $updatedCustomerDataObject->getLastname());
+        $existingCustomerDataObject = $this->_getCustomerData($customerData[Customer::ID]);
+        $this->assertEquals($lastName . "Updated", $existingCustomerDataObject->getLastname());
     }
 
     /**