class DateTimeFormInjectionTest

class DateTimeFormInjectionTest extends KernelTestBase implements FormInterface {
  use DependencySerializationTrait;
  
  /**
   * A Dblog logger instance.
   *
   * @var \Psr\Log\LoggerInterface
   */
  protected $logger;
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'system',
    'datetime',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installSchema('system', [
      'sequences',
    ]);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'datetime_test_injection_form';
  }
  
  /**
   * Process callback.
   *
   * @param array $element
   *   Form element.
   *
   * @return array
   *   Processed element.
   */
  public function process($element) {
    return $element;
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['datelist_element'] = [
      '#title' => 'datelist test',
      '#type' => 'datelist',
      '#default_value' => new DrupalDateTime('2000-01-01 00:00:00'),
      '#date_part_order' => [
        'month',
        'day',
        'year',
        'hour',
        'minute',
        'ampm',
      ],
      '#date_text_parts' => [
        'year',
      ],
      '#date_year_range' => '2010:2020',
      '#date_increment' => 15,
    ];
    $form['#process'][] = [
      $this,
      'process',
    ];
    return $form;
  }
  
  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
  }
  
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->assertTrue(TRUE);
    $form_state->setRebuild();
  }
  
  /**
   * Tests custom string injection serialization.
   */
  public function testDatetimeSerialization() {
    $form_state = new FormState();
    $form_state->setRequestMethod('POST');
    $form_state->setCached();
    $form_builder = $this->container
      ->get('form_builder');
    $form_id = $form_builder->getFormId($this, $form_state);
    $form = $form_builder->retrieveForm($form_id, $form_state);
    $form_builder->prepareForm($form_id, $form, $form_state);
    // Set up $form_state so that the form is properly submitted.
    $form_state->setUserInput([
      'form_id' => $form_id,
    ]);
    $form_state->setProgrammed();
    $form_state->setSubmitted();
    $form_builder->processForm($form_id, $form, $form_state);
  }

}