ConfirmFormTest.php

<?php

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

use Drupal\Core\Url;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests confirmation forms.
 *
 * @group Form
 */
class ConfirmFormTest extends BrowserTestBase {

  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'form_test',
  ];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  public function testConfirmForm() {

    // Test the building of the form.
    $this
      ->drupalGet('form-test/confirm-form');
    $site_name = $this
      ->config('system.site')
      ->get('name');
    $this
      ->assertSession()
      ->titleEquals("ConfirmFormTestForm::getQuestion(). | {$site_name}");
    $this
      ->assertSession()
      ->pageTextContains('ConfirmFormTestForm::getDescription().');
    $this
      ->assertSession()
      ->buttonExists('ConfirmFormTestForm::getConfirmText().');

    // Test cancelling the form.
    $this
      ->clickLink('ConfirmFormTestForm::getCancelText().');
    $this
      ->assertSession()
      ->addressEquals('form-test/autocomplete');

    // Test submitting the form.
    $this
      ->drupalGet('form-test/confirm-form');
    $this
      ->submitForm([], 'ConfirmFormTestForm::getConfirmText().');
    $this
      ->assertSession()
      ->pageTextContains('The ConfirmFormTestForm::submitForm() method was used for this form.');
    $this
      ->assertSession()
      ->addressEquals('');

    // Test submitting the form with a destination.
    $this
      ->drupalGet('form-test/confirm-form', [
      'query' => [
        'destination' => 'admin/config',
      ],
    ]);
    $this
      ->submitForm([], 'ConfirmFormTestForm::getConfirmText().');
    $this
      ->assertSession()
      ->addressEquals('admin/config');

    // Test cancelling the form with a complex destination.
    $this
      ->drupalGet('form-test/confirm-form-array-path');
    $this
      ->clickLink('ConfirmFormArrayPathTestForm::getCancelText().');

    // Verify that the form's complex cancel link was followed.
    $this
      ->assertSession()
      ->addressEquals('form-test/confirm-form?destination=admin/config');
  }

  /**
   * Tests that the confirm form does not use external destinations.
   */
  public function testConfirmFormWithExternalDestination() {
    $this
      ->drupalGet('form-test/confirm-form');
    $this
      ->assertSession()
      ->linkByHrefExists(Url::fromRoute('form_test.route8')
      ->toString());
    $this
      ->drupalGet('form-test/confirm-form', [
      'query' => [
        'destination' => 'node',
      ],
    ]);
    $this
      ->assertSession()
      ->linkByHrefExists(Url::fromUri('internal:/node')
      ->toString());
    $this
      ->drupalGet('form-test/confirm-form', [
      'query' => [
        'destination' => 'http://example.com',
      ],
    ]);
    $this
      ->assertSession()
      ->linkByHrefExists(Url::fromRoute('form_test.route8')
      ->toString());
    $this
      ->drupalGet('form-test/confirm-form', [
      'query' => [
        'destination' => '<front>',
      ],
    ]);
    $this
      ->assertSession()
      ->linkByHrefExists(Url::fromRoute('<front>')
      ->toString());

    // Other invalid destinations, should fall back to the form default.
    $this
      ->drupalGet('form-test/confirm-form', [
      'query' => [
        'destination' => '/http://example.com',
      ],
    ]);
    $this
      ->assertSession()
      ->linkByHrefExists(Url::fromRoute('form_test.route8')
      ->toString());
  }

}