TextareaTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\Form;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests the form API textarea element.
 *
 * @group Form
 */
class TextareaTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests the textarea element #resizable property.
     */
    public function testFormTextareaResizable() : void {
        $this->drupalGet('form-test/textarea');
        $this->assertNotEmpty($this->cssSelect('#edit-textarea-resizable-vertical.resize-vertical'));
        $this->assertNotEmpty($this->cssSelect('#edit-textarea-resizable-horizontal.resize-horizontal'));
        $this->assertNotEmpty($this->cssSelect('#edit-textarea-resizable-both.resize-both'));
        $this->assertNotEmpty($this->cssSelect('#edit-textarea-resizable-none.resize-none'));
    }

}