class ThemeSettingsFormTest

class ThemeSettingsFormTest extends WebDriverTestBase {
  use TestFileCreationTrait;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'file',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $admin = $this->drupalCreateUser([
      'administer themes',
    ]);
    $this->drupalLogin($admin);
  }
  
  /**
   * Tests that submission handler works correctly.
   *
   * @dataProvider providerTestFormSettingsSubmissionHandler
   */
  public function testFormSettingsSubmissionHandler($theme) {
    \Drupal::service('theme_installer')->install([
      $theme,
    ]);
    $page = $this->getSession()
      ->getPage();
    $assert_session = $this->assertSession();
    $this->drupalGet("admin/appearance/settings/{$theme}");
    // Add a new managed file.
    $file = current($this->getTestFiles('image'));
    $image_file_path = \Drupal::service('file_system')->realpath($file->uri);
    $page->attachFileToField('files[custom_logo]', $image_file_path);
    $assert_session->waitForButton('custom_logo_remove_button');
    // Assert the new file is uploaded as temporary. This file should not be
    // saved as permanent if settings are not submitted.
    $image_field = $this->assertSession()
      ->hiddenFieldExists('custom_logo[fids]');
    $file = File::load($image_field->getValue());
    $this->assertFalse($file->isPermanent());
    $page->pressButton('Save configuration');
    \Drupal::entityTypeManager()->getStorage('file')
      ->resetCache();
    // Assert the uploaded file is saved as permanent.
    $image_field = $this->assertSession()
      ->hiddenFieldExists('custom_logo[fids]');
    $file = File::load($image_field->getValue());
    $this->assertTrue($file->isPermanent());
  }
  
  /**
   * Provides test data for ::testFormSettingsSubmissionHandler().
   */
  public function providerTestFormSettingsSubmissionHandler() {
    return [
      'test theme.theme' => [
        'test_theme_theme',
      ],
      'test theme-settings.php' => [
        'test_theme_settings',
      ],
    ];
  }

}