HtmxAssetLoadTestSetup.php

<?php

declare (strict_types=1);
namespace Drupal\TestSite;

use Drupal\Core\Extension\ModuleInstallerInterface;

/**
 * Setup file used by core/tests/Drupal/Nightwatch/Tests/htmx/htmxTest.js.
 */
class HtmxAssetLoadTestSetup implements TestSetupInterface {
  
  /**
   * {@inheritdoc}
   */
  public function setup() : void {
    // Install required modules.
    $module_installer = \Drupal::service('module_installer');
    assert($module_installer instanceof ModuleInstallerInterface);
    $module_installer->install([
      'test_htmx',
    ]);
  }

}