3 namespace Drupal\Tests\system\Kernel\Form;
5 use Drupal\Core\Form\FormInterface;
6 use Drupal\Core\Form\FormState;
7 use Drupal\Core\Form\FormStateInterface;
8 use Drupal\KernelTests\KernelTestBase;
9 use Symfony\Component\CssSelector\CssSelectorConverter;
12 * Tests the maxlength HTML attribute on form elements.
16 class FormElementMaxlengthTest extends KernelTestBase implements FormInterface {
21 public static $modules = ['system'];
26 public function getFormId() {
27 return 'form_test_maxlength';
33 public function buildForm(array $form, FormStateInterface $form_state) {
35 '#type' => 'textfield',
39 $form['description'] = [
40 '#type' => 'textarea',
55 public function submitForm(array &$form, FormStateInterface $form_state) {}
60 public function validateForm(array &$form, FormStateInterface $form_state) {}
63 * Ensures maxlength attribute can be used in compatible elements.
65 public function testAttributes() {
67 /** @var \Drupal\Core\Form\FormBuilderInterface $form_builder */
68 $form_builder = $this->container->get('form_builder');
69 $form_state = new FormState();
70 $elements = $form_builder->buildForm($this, $form_state);
71 $this->render($elements);
73 $css_selector_converter = new CssSelectorConverter();
74 $elements = $this->xpath($css_selector_converter->toXPath('input[name=title][maxlength=255]'));
75 $this->assertCount(1, $elements, 'Text field has correct maxlength in form.');
76 $elements = $this->xpath($css_selector_converter->toXPath('textarea[name=description][maxlength=255]'));
77 $this->assertCount(1, $elements, 'Textarea field has correct maxlength in form.');