MAGETWO-74021: "Catalog Products List" widget does not displays on frontend

Author: victor-v-rad

dev/tests/integration/testsuite/Magento/Catalog/_files/products_with_dropdown_attribute_rollback.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+/**
+ * Remove all products as strategy of isolation process
+ */
+$registry = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()->get('Magento\Framework\Registry');
+$registry->unregister('isSecureArea');
+$registry->register('isSecureArea', true);
+
+/** @var $productCollection \Magento\Catalog\Model\ResourceModel\Product */
+$productCollection = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()
+    ->create('Magento\Catalog\Model\Product')
+    ->getCollection();
+
+foreach ($productCollection as $product) {
+    $product->delete();
+}
+
+$registry->unregister('isSecureArea');
+$registry->register('isSecureArea', false);