[Behat] Fixed behat pagination next button (#1583)

* Fix behat pagination next button

* Implement nowdoc for JavaScript execution

Author: KamilSznajdrowicz

src/lib/Behat/Component/Pagination.php

@@ -22,11 +22,12 @@ public function clickNextButton(): void
     {
         $currentPage = (int) $this->getHTMLPage()->find($this->getLocator('currentPage'))->getText();
         // scroll to the bottom to avoid "Go to top" button
-        $this->getHTMLPage()->executeJavaScript("document.querySelector('.ibexa-back-to-top-scroll-container').scrollTo(0, document.querySelector('.ibexa-back-to-top-scroll-container').scrollHeight)");
+        $this->getHTMLPage()->executeJavaScript(<<<'JS'
+document.querySelector('.ibexa-back-to-top-scroll-container') && document.querySelector('.ibexa-back-to-top-scroll-container').scrollTo(0, document.querySelector('.ibexa-back-to-top-scroll-container').scrollHeight);
+JS);
         $this->getHTMLPage()
             ->setTimeout(3)
-            ->find(new VisibleCSSLocator('backToTopWithTitle', '.ibexa-back-to-top__title--visible'))
-            ->assert()->textEquals('Go to top');
+            ->findAll(new VisibleCSSLocator('backToTopWithTitle', '.ibexa-back-to-top__title--visible'));
         $this->getHTMLPage()->find($this->getLocator('nextButton'))->click();
         $this->getHTMLPage()->setTimeout(10)->waitUntil(function () use ($currentPage) {
             $activePge = (int) $this->getHTMLPage()->find($this->getLocator('currentPage'))->getText();