SiteSettingsFormTest.php

<?php

declare (strict_types=1);
namespace Drupal\FunctionalTests\Installer;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests the extension of the site settings form.
 *
 * @group Installer
 */
class SiteSettingsFormTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'install_form_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Confirms that the form is extensible.
     */
    public function testSiteSettingsForm() : void {
        // Test that the form page can be loaded without errors.
        $this->drupalGet('test-form');
        $this->assertSession()
            ->statusCodeEquals(200);
    }

}