ACP2E-1875: Products incorrectly showed Out of Stock then all products show in stock

Author: Anna Bukatar

app/code/Magento/ImportExport/Test/Unit/Plugin/DeferCacheCleaningUntilImportIsCompleteTest.php

@@ -0,0 +1,58 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\ImportExport\Test\Unit\Plugin;
+
+use Magento\Framework\Indexer\DeferredCacheCleanerInterface;
+use Magento\ImportExport\Model\Import;
+use Magento\ImportExport\Plugin\DeferCacheCleaningUntilImportIsComplete;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+class DeferCacheCleaningUntilImportIsCompleteTest  extends TestCase
+{
+    /**
+     * @var DeferCacheCleaningUntilImportIsComplete
+     */
+    private $plugin;
+
+    /**
+     * @var DeferredCacheCleanerInterface|MockObject
+     */
+    private $cacheCleaner;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->cacheCleaner = $this->getMockForAbstractClass(DeferredCacheCleanerInterface::class);
+        $this->plugin = new DeferCacheCleaningUntilImportIsComplete($this->cacheCleaner);
+    }
+
+    /**
+     * @return void
+     */
+    public function testBeforeMethod()
+    {
+        $this->cacheCleaner->expects($this->once())->method('start');
+        $subject = $this->createMock(Import::class);
+        $this->plugin->beforeImportSource($subject);
+    }
+
+    /**
+     * @return void
+     */
+    public function testAfterMethod()
+    {
+        $this->cacheCleaner->expects($this->once())->method('flush');
+        $subject = $this->createMock(Import::class);
+        $result = $this->plugin->afterImportSource($subject, true);
+        $this->assertTrue($result);
+    }
+}