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

@@ -8,7 +8,6 @@
 
 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;
@@ -18,10 +17,11 @@
 use PHPUnit\Framework\TestCase;
 
 /**
- * Test for Special Start Date attribute
+ * Test for Start Date attribute backend model
+ *
+ * @see \Magento\Catalog\Model\Attribute\Backend\Startdate
  *
  * @magentoAppArea adminhtml
- * @magentoAppIsolation enabled
  */
 class StartdateTest extends TestCase
 {
@@ -45,7 +45,8 @@ protected function setUp(): void
         $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');
-        $attribute->setMaxValue(date('Y-m-d H:i:s', strtotime('-10 days')));
+        //$attribute->setMaxValue(date('Y-m-d H:i:s', strtotime('-10 days')));
+        $attribute->setMaxValue(new \DateTime('-10 days'));
         $this->startDate->setAttribute($attribute);
     }
 
@@ -66,7 +67,8 @@ public function testBeforeSave(): void
     public function testValidate(): void
     {
         $product = $this->productFactory->create();
-        $product->setNewsFromDate(date('d-m-Y'));
+        //$product->setNewsFromDate(date('d-m-Y'));
+        $product->setNewsFromDate(new \DateTime());
         $this->expectException(Exception::class);
         $msg = __('Make sure the To Date is later than or the same as the From Date.');
         $this->expectExceptionMessage((string)$msg);