MagentoLoadingMasks.php

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<?php
namespace Magento\FunctionalTestingFramework\Extension\ReadinessMetrics;

use Facebook\WebDriver\Exception\NoSuchElementException;
use Facebook\WebDriver\Exception\StaleElementReferenceException;
use Magento\FunctionalTestingFramework\Module\MagentoWebDriver;
use WebDriverBy;

class MagentoLoadingMasks extends AbstractMetricCheck
{
    protected function doesMetricPass($value)
    {
        return $value === null;
    }

    protected function fetchValueFromPage()
    {
        foreach (MagentoWebDriver::$loadingMasksLocators as $maskLocator) {
            $driverLocator = WebDriverBy::xpath($maskLocator);
            $maskElements = $this->getDriver()->webDriver->findElements($driverLocator);
            foreach ($maskElements as $element) {
                try {
                    if ($element->isDisplayed()) {
                        return "$maskLocator : " . $element ->getID();
                    }
                } catch (NoSuchElementException $e) {
                } catch (StaleElementReferenceException $e) {
                }
            }
        }
        return null;
    }
}