FieldUIIndentationTest.php

<?php

namespace Drupal\Tests\field_ui\Functional;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests indentation on Field UI.
 *
 * @group field_ui
 */
class FieldUIIndentationTest extends BrowserTestBase {
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'field_ui',
        'field_ui_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create a test user.
        $admin_user = $this->drupalCreateUser([
            'access content',
            'administer content types',
            'administer node display',
        ]);
        $this->drupalLogin($admin_user);
        // Create Basic page node type.
        $this->drupalCreateContentType([
            'type' => 'page',
            'name' => 'Basic page',
        ]);
    }
    public function testIndentation() {
        $this->drupalGet('admin/structure/types/manage/page/display');
        $this->assertSession()
            ->responseContains('js-indentation indentation');
    }

}