IBX-9519: [Behat] Added basic test coverage for content tree

features/standard/ContentTree.feature

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+@IbexaOSS @IbexaHeadless @IbexaCommerce @IbexaExperience @javascript
+Feature: Content tree basic operations
+
+  Scenario: It is possible to display items on Content tree
+    Given I create "article" Content items
+      | title       | short_title   | parentPath | language |
+      | Article1    | art1          | root       | eng-GB   |
+      | Article2    | art2          | root       | eng-GB   |
+      | Article3    | art3          | root       | eng-GB   |
+    And I am logged as admin
+    And I'm on Content view Page for "root/art1"
+
+    Scenario: New Content item can be created under chosen nested node
+      Given I am logged as admin
+      And I'm on Content view Page for "root/art1"
+      When I start creating a new content "Article"
+      And I set content fields
+        | label       | value                  |
+        | Title       | Arttest |
+        | Short title | arttest |
+        | Intro       | TestArticleIntro       |
+      And I perform the "Publish" action
+      And I should be on Content view Page for "root/art1/arttest"
+
+

src/lib/Behat/Component/ContentTree.php

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+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Ibexa\AdminUi\Behat\Component;
+
+use Behat\Mink\Session;
+use Ibexa\Behat\Browser\Component\Component;
+use Ibexa\Behat\Browser\Element\BaseElementInterface;
+use Ibexa\Behat\Browser\Element\ElementInterface;
+use Ibexa\Behat\Browser\Locator\VisibleCSSLocator;
+
+
+class ContentTree extends Component
+{
+    public function verifyIsLoaded(): void
+    {
+        $this->getHTMLPage()->find($this->getLocator('header'))->assert()->textEquals('Content tree');
+        $this->clearSearch();
+        $this->getHTMLPage()->setTimeout(10)->find($this->getLocator('header'))->assert()->isVisible('Content tree');
+    }
+    public function verifyItemExists(string $itemPath): void
+    {
+        Assert::assertTrue($this->itemExists($itemPath));
+    }
+
+    public function itemExists(string $itemPath): bool
+    {
+        $this->clearSearch();
+
+
+    }
+
+    private function findNestedTreeElement(BaseElementInterface $baseElement, string $searchedElementName, int $indent): ElementInterface
+    {
+        return
+    }
+
+    protected function specifyLocators(): array
+    {
+        return [
+            new VisibleCSSLocator('header','.ibexa-content-tree-container .c-tb-header__name-content'),
+            new VisibleCSSLocator('toggler','.c-tb-contextual-menu__toggler'),
+            new VisibleCSSLocator('item', '.c-tb-list-item-single__element .c-tb-list-item-single__element--main')
+            ];
+    }
+}