Check visibility block only x product left for simple product

Author: Usik2203

app/code/Magento/Catalog/Test/Mftf/Data/CatalogInventoryConfigData.xml

@@ -30,4 +30,9 @@
         <data key="label">No</data>
         <data key="value">0</data>
     </entity>
+    <entity name="CatalogInventoryOptionsOnlyXleftThreshold">
+        <!-- Magento default value -->
+        <data key="path">cataloginventory/options/stock_threshold_qty</data>
+        <data key="value">0</data>
+    </entity>
 </entities>

app/code/Magento/Catalog/Test/Mftf/Section/StorefrontProductPageSection.xml

@@ -25,5 +25,6 @@
         <element name="customOptionDropDown" type="select" selector="//*[@id='product-options-wrapper']//select[contains(@class, 'product-custom-option admin__control-select')]"/>
         <element name="qtyInputWithProduct" type="input" selector="//tr//strong[contains(.,'{{productName}}')]/../../td[@class='col qty']//input" parameterized="true"/>
         <element name="customOptionRadio" type="input" selector="//span[contains(text(),'{{customOption}}')]/../../input" parameterized="true"/>
+        <element name="onlyProductsLeft" type="block" selector="//div[@class='availability only']"/>
     </section>
-</sections>
+</sections>

app/code/Magento/Catalog/Test/Mftf/Test/StorefrontOnlyXProductLeftForSimpleProductsTest.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
+    <test name="StorefrontOnlyXProductLeftForSimpleProductsTest">
+        <annotations>
+            <features value="Catalog"/>
+            <title value="See Only * Left block"/>
+            <stories value="See Only * Left on product page if Only X left Threshold was set"/>
+            <description value="See Only * Left on product page if Only X left Threshold was set"/>
+            <severity value="MINOR"/>
+        </annotations>
+        <before>
+            <createData entity="_defaultCategory" stepKey="createCategory"/>
+            <createData entity="ApiSimpleProduct" stepKey="createProduct">
+                <requiredEntity createDataKey="createCategory"/>
+            </createData>
+            <magentoCLI command="config:set {{CatalogInventoryOptionsOnlyXleftThreshold.path}} 10000" stepKey="setStockThresholdQty"/>
+            <magentoCLI command="cache:flush" stepKey="flushCache"/>
+        </before>
+        <after>
+            <deleteData createDataKey="createCategory" stepKey="deleteCategory"/>
+            <deleteData createDataKey="createProduct" stepKey="deleteProduct"/>
+            <magentoCLI command="config:set {{CatalogInventoryOptionsOnlyXleftThreshold.path}} {{CatalogInventoryOptionsOnlyXleftThreshold.value}}" stepKey="removedStockThresholdQty"/>
+        </after>
+        <actionGroup ref="StorefrontOpenProductPageActionGroup" stepKey="openProductPage">
+            <argument name="productUrl" value="$createProduct.custom_attributes[url_key]$"/>
+        </actionGroup>
+        <seeElement selector="{{StorefrontProductPageSection.onlyProductsLeft}}" stepKey="seeOnlyLeftBlock"/>
+    </test>
+</tests>