MC-39606: Create automated test for: "Save the product with "Set new as from" attribute"

Author: ysapiga

dev/tests/integration/testsuite/Magento/Catalog/Model/Attribute/Backend/StartdateTest.php

@@ -0,0 +1,75 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\Catalog\Model\Attribute\Backend;
+
+use Magento\AsynchronousOperations\Api\Data\OperationInterfaceFactory;
+use Magento\Catalog\Api\Data\ProductInterfaceFactory;
+use Magento\Catalog\Model\Product;
+use Magento\Eav\Model\Config;
+use Magento\Eav\Model\Entity\Attribute\Exception;
+use Magento\Framework\ObjectManagerInterface;
+use Magento\TestFramework\Helper\Bootstrap;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test for Special Start Date attribute
+ *
+ * @magentoAppArea adminhtml
+ * @magentoAppIsolation enabled
+ */
+class StartdateTest extends TestCase
+{
+    /** @var ObjectManagerInterface */
+    private $objectManager;
+
+    /** @var ProductInterfaceFactory */
+    private $productFactory;
+
+    /** @var Startdate */
+    private $startDate;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->objectManager = Bootstrap::getObjectManager();
+        $this->productFactory = $this->objectManager->get(ProductInterfaceFactory::class);
+        $this->startDate = $this->objectManager->get(Startdate::class);
+        $attribute = $this->objectManager->get(Config::class)->getAttribute(Product::ENTITY, 'news_from_date');
+        $attribute->setMaxValue(date('Y-m-d H:i:s', strtotime('-10 days')));
+        $this->startDate->setAttribute($attribute);
+    }
+
+    /**
+     * @return void
+     */
+    public function testBeforeSave(): void
+    {
+        $product = $this->productFactory->create();
+        $product->setNewsFromDate(false);
+        $this->startDate->beforeSave($product);
+        $this->assertNull($product->getNewsFromDateIsFormated());
+    }
+
+    /**
+     * @return void
+     */
+    public function testValidate(): void
+    {
+        $product = $this->productFactory->create();
+        $product->setNewsFromDate(date('d-m-Y'));
+        $this->expectException(Exception::class);
+        $msg = __('Make sure the To Date is later than or the same as the From Date.');
+        $this->expectExceptionMessage((string)$msg);
+        $this->startDate->validate($product);
+    }
+}