getTestKernel example

/** * Tests DIC compilation. */
  public function testCompileDIC() {
    // @todo: write a memory based storage backend for testing.     $modules_enabled = [
      'system' => 'system',
      'user' => 'user',
    ];

    $request = Request::createFromGlobals();
    $this->getTestKernel($request, $modules_enabled);

    // Instantiate it a second time and we should get the compiled Container     // class.     $kernel = $this->getTestKernel($request);
    $container = $kernel->getContainer();
    $refClass = new \ReflectionClass($container);
    $is_compiled_container = !$refClass->isSubclassOf('Symfony\Component\DependencyInjection\ContainerBuilder');
    $this->assertTrue($is_compiled_container);
    // Verify that the list of modules is the same for the initial and the     // compiled container.     $module_list = array_keys($container->get('module_handler')->getModuleList());