<?php

namespace Drupal\Tests\system\Functional\Form;

use Drupal\Tests\BrowserTestBase;
use Drupal\Tests\TestFileCreationTrait;

/**
 * Tests proper removal of submitted form values using
 * \Drupal\Core\Form\FormState::cleanValues() when having forms with elements
 * containing buttons like "managed_file".
 *
 * @group Form
 */
class StateValuesCleanAdvancedTest extends BrowserTestBase {

  use TestFileCreationTrait {
    getTestFiles as drupalGetTestFiles;
  }

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

  /**
   * An image file path for uploading.
   */
  protected $image;

  /**
   * Tests \Drupal\Core\Form\FormState::cleanValues().
   */
  public function testFormStateValuesCleanAdvanced() {

    // Get an image for uploading.
    $image_files = $this->drupalGetTestFiles('image');
    $this->image = current($image_files);

    // Check if the physical file is there.
    $this->assertTrue(is_file($this->image->uri), "The image file we're going to upload exists.");

    // "Browse" for the desired file.
    $edit = ['files[image]' => \Drupal::service('file_system')->realpath($this->image->uri)];

    // Post the form.
    $this->drupalPostForm('form_test/form-state-values-clean-advanced', $edit, t('Submit'));

    // Expecting a 200 HTTP code.
    $this->assertResponse(200, 'Received a 200 response for posted test file.');
    $this->assertRaw(t('You WIN!'), 'Found the success message.');
  }

}