FormObjectTest.php

<?php

namespace Drupal\Tests\system\Kernel\Form;

use Drupal\form_test\FormTestObject;
use Drupal\KernelTests\ConfigFormTestBase;

/**
 * Tests building a form from an object.
 *
 * @group Form
 */
class FormObjectTest extends ConfigFormTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->form = new FormTestObject($this->container
            ->get('config.factory'));
        $this->values = [
            'bananas' => [
                '#value' => $this->randomString(10),
                '#config_name' => 'form_test.object',
                '#config_key' => 'bananas',
            ],
        ];
    }

}