sessionless-1.x-dev/tests/src/Functional/SessionlessFormsFormTest.php

<?php

declare(strict_types=1);
namespace Drupal\Tests\sessionless\Functional;

use Drupal\Core\KeyValueStore\KeyValueExpirableFactoryInterface;
use Drupal\Tests\BrowserTestBase;

/**
 * @group sessionless
 */
final class SessionlessFormsFormTest extends BrowserTestBase {

  protected $defaultTheme = 'stark';

  protected static $modules = [
    'sessionless_forms_test',
  ];

  private KeyValueExpirableFactoryInterface $keyValueExpirableFactory;

  protected function setUp(): void {
    parent::setUp();
    $this->keyValueExpirableFactory = \Drupal::service('keyvalue.expirable');
  }

  public function testForm(): void {
    $this->drupalGet('sessionless_forms_test_form');
    $this->submitForm(['text' => 'JohnDoe'], 'Submit');
    $this->assertSession()->statusCodeEquals(200);
    $this->submitForm([], 'Submit');
    $this->assertSession()->statusCodeEquals(200);

    $this->assertSame([NULL, NULL], $this->getCoreCachedFormAndFormState());

    // Verify form state persists via SessionlessForm.
    $this->assertSession()->pageTextContainsOnce('TestValue:AliceInWonderland');
  }

  public function getCoreCachedFormAndFormState(): array {
    $formBuildIdElement = $this->assertSession()
      ->hiddenFieldExists('form_build_id');
    $formBuildId = $formBuildIdElement->getAttribute('value');
    $cachedForm = $this->keyValueExpirableFactory
      ->get('form')->get($formBuildId);
    $cachedFormState = $this->keyValueExpirableFactory
      ->get('form_state')->get($formBuildId);
    return [$cachedForm, $cachedFormState];
  }

}