MAGETWO-98522: Adding out of stock items to comparison shows success message but fails

- Fix static and functional test

Author: YuliyaLabudova

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

@@ -29,6 +29,7 @@
             <deleteData createDataKey="product" stepKey="deleteProduct"/>
             <deleteData createDataKey="category" stepKey="deleteCategory"/>
             <amOnPage url="{{AdminLogoutPage.url}}" stepKey="amOnLogoutPage"/>
+            <actionGroup ref="noDisplayOutOfStockProduct" stepKey="noDisplayOutOfStockProduct"/>
         </after>
 
         <!--Check 'out of stock' is turned off by default-->

app/code/Magento/Catalog/ViewModel/Product/Checker/AddToCompareAvailability.php

@@ -32,6 +32,7 @@ public function __construct(StockConfigurationInterface $stockConfiguration)
     /**
      * Is product available for comparison.
      *
+     * @param ProductInterface $product
      * @return bool
      */
     public function isAvailableForCompare(ProductInterface $product): bool
@@ -43,6 +44,7 @@ public function isAvailableForCompare(ProductInterface $product): bool
     /**
      * Get is in stock status.
      *
+     * @param ProductInterface $product
      * @return bool
      */
     private function isInStock(ProductInterface $product): bool

app/code/Magento/CatalogInventory/Test/Mftf/ActionGroup/DisplayOutOfStockProductActionGroup.xml

@@ -21,6 +21,7 @@
     <actionGroup name="noDisplayOutOfStockProduct">
         <amOnPage url="{{InventoryConfigurationPage.url}}" stepKey="navigateToInventoryConfigurationPage"/>
         <waitForPageLoad stepKey="waitForConfigPageToLoad"/>
+        <conditionalClick stepKey="expandProductStockOptions" selector="{{InventoryConfigSection.ProductStockOptionsTab}}" dependentSelector="{{InventoryConfigSection.CheckIfProductStockOptionsTabExpanded}}" visible="true" />
         <uncheckOption selector="{{InventoryConfigSection.DisplayOutOfStockSystemValue}}" stepKey="uncheckUseSystemValue"/>
         <waitForElementVisible selector="{{InventoryConfigSection.DisplayOutOfStockDropdown}}" stepKey="waitForSwitcherDropdown" />
         <selectOption selector="{{InventoryConfigSection.DisplayOutOfStockDropdown}}" userInput="No" stepKey="switchToNo" />