NodePreviewAnonymousTest.php

<?php

namespace Drupal\Tests\node\Functional;

use Drupal\Core\Session\AccountInterface;
use Drupal\Tests\BrowserTestBase;
use Drupal\user\Entity\Role;

/**
 * Tests the node entity preview functionality for anonymous user.
 *
 * @group node
 */
class NodePreviewAnonymousTest extends BrowserTestBase {
    
    /**
     * Enable node module to test on the preview.
     *
     * @var array
     */
    protected static $modules = [
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create Basic page node type.
        $this->drupalCreateContentType([
            'type' => 'page',
            'name' => 'Basic page',
            'display_submitted' => FALSE,
        ]);
        // Grant create and editing permissions to anonymous user:
        $anonymous_role = Role::load(AccountInterface::ANONYMOUS_ROLE);
        $anonymous_role->grantPermission('create page content');
        $anonymous_role->save();
    }
    
    /**
     * Checks the node preview functionality for anonymous users.
     */
    public function testAnonymousPagePreview() {
        $title_key = 'title[0][value]';
        $body_key = 'body[0][value]';
        // Fill in node creation form and preview node.
        $edit = [
            $title_key => $this->randomMachineName(),
            $body_key => $this->randomMachineName(),
        ];
        $this->drupalGet('node/add/page');
        $this->submitForm($edit, 'Preview');
        // Check that the preview is displaying the title, body and term.
        $this->assertSession()
            ->linkExists('Back to content editing');
        $this->assertSession()
            ->responseContains($edit[$body_key]);
        $this->assertSession()
            ->titleEquals($edit[$title_key] . ' | Drupal');
    }

}