MAGETWO-70683: New registered customer not showed in admin customer grid

- add integration test

Author: vgoncharenko

dev/tests/integration/testsuite/Magento/Customer/Model/ResourceModel/Grid/CollectionTest.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Customer\Model\ResourceModel\Grid;
+
+use Magento\Customer\Api\CustomerRepositoryInterface;
+use Magento\Customer\Api\Data\CustomerInterface;
+use Magento\Framework\Indexer\IndexerRegistry;
+use Magento\TestFramework\Helper\Bootstrap;
+
+/**
+ * Customer grid collection tests.
+ */
+class CollectionTest extends \Magento\TestFramework\Indexer\TestCase
+{
+    /** @var \Magento\Framework\ObjectManagerInterface */
+    private $objectManager;
+
+    /** @var IndexerRegistry */
+    private $indexerRegistry;
+
+    /** @var \Magento\Customer\Model\ResourceModel\Grid\Collection */
+    private $targetObject;
+
+    /** @var CustomerRepositoryInterface */
+    private $customerRepository;
+
+    protected function setUp()
+    {
+        $this->objectManager = Bootstrap::getObjectManager();
+        $this->indexerRegistry = $this->objectManager->create(IndexerRegistry::class);
+        $this->targetObject = $this->objectManager
+            ->create(\Magento\Customer\Model\ResourceModel\Grid\Collection::class);
+        $this->customerRepository = $this->objectManager->create(CustomerRepositoryInterface::class);
+    }
+
+    /**
+     * Customer Grid Indexer can't work in 'Update on Schedule' mode.
+     *
+     * @magentoDataFixture Magento/Customer/_files/customer_grid_indexer_enabled_update_on_schedule.php
+     * @magentoDataFixture Magento/Customer/_files/customer_sample.php
+     */
+    public function testGetItemByIdForUpdateOnSchedule()
+    {
+        /** Verify after first save */
+        /** @var CustomerInterface $newCustomer */
+        $newCustomer = $this->customerRepository->get('customer@example.com');
+        /** @var CustomerInterface $item */
+        $item = $this->targetObject->getItemById($newCustomer->getId());
+        $this->assertNotEmpty($item);
+        $this->assertSame($newCustomer->getEmail(), $item->getEmail());
+        $this->assertSame('test street test city Armed Forces Middle East 01001', $item->getBillingFull());
+
+        /** Verify after update */
+        $newCustomer->setEmail('customer_updated@example.com');
+        $this->customerRepository->save($newCustomer);
+        $this->targetObject->clear();
+        $item = $this->targetObject->getItemById($newCustomer->getId());
+        $this->assertSame($newCustomer->getEmail(), $item->getEmail());
+
+        /** Rollback indexer to default state */
+        $indexer = $this->indexerRegistry->get(\Magento\Customer\Model\Customer::CUSTOMER_GRID_INDEXER_ID);
+        $indexer->setScheduled(false);
+    }
+}

dev/tests/integration/testsuite/Magento/Customer/_files/customer_grid_indexer_enabled_update_on_schedule.php

@@ -0,0 +1,11 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+$objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();
+/** @var Magento\Framework\Indexer\IndexerRegistry $indexerRegistry */
+$indexerRegistry = $objectManager->create(\Magento\Framework\Indexer\IndexerRegistry::class);
+$indexer = $indexerRegistry->get(\Magento\Customer\Model\Customer::CUSTOMER_GRID_INDEXER_ID);
+$indexer->setScheduled(true);