class FileFieldWidgetTest in Drupal 9

Same name in this branch

9 core/modules/file/tests/src/Functional/FileFieldWidgetTest.php \Drupal\Tests\file\Functional\FileFieldWidgetTest
9 core/modules/file/tests/src/FunctionalJavascript/FileFieldWidgetTest.php \Drupal\Tests\file\FunctionalJavascript\FileFieldWidgetTest

Same name and namespace in other branches

8 core/modules/file/tests/src/Functional/FileFieldWidgetTest.php \Drupal\Tests\file\Functional\FileFieldWidgetTest
10 core/modules/file/tests/src/Functional/FileFieldWidgetTest.php \Drupal\Tests\file\Functional\FileFieldWidgetTest

Tests the file field widget with public and private files.

@group file

Hierarchy

class \Drupal\Tests\BrowserTestBase extends \PHPUnit\Framework\TestCase uses \Symfony\Bridge\PhpUnit\ExpectDeprecationTrait, FunctionalTestSetupTrait, TestSetupTrait, AssertLegacyTrait, BlockCreationTrait, ConfigTestTrait, ExtensionListTestTrait, ContentTypeCreationTrait, NodeCreationTrait, PhpUnitCompatibilityTrait, RandomGeneratorTrait, TestRequirementsTrait, PhpUnitWarnings, UiHelperTrait, UserCreationTrait, XdebugRequestTrait
- class \Drupal\Tests\file\Functional\FileFieldTestBase uses FileFieldCreationTrait, TestFileCreationTrait
  - class \Drupal\Tests\file\Functional\FileFieldWidgetTest uses CommentTestTrait, FieldUiTestTrait

Expanded class hierarchy of FileFieldWidgetTest

File

core/modules/file/tests/src/Functional/FileFieldWidgetTest.php, line 23

Namespace

Drupal\Tests\file\Functional

View source

class FileFieldWidgetTest extends FileFieldTestBase {
  use CommentTestTrait;
  use FieldUiTestTrait;

  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'comment',
    'block',
  ];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'classy';

  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this
      ->drupalPlaceBlock('system_breadcrumb_block');
  }

  /**
   * Creates a temporary file, for a specific user.
   *
   * @param string $data
   *   A string containing the contents of the file.
   * @param \Drupal\user\UserInterface $user
   *   The user of the file owner.
   *
   * @return \Drupal\file\FileInterface
   *   A file object, or FALSE on error.
   */
  protected function createTemporaryFile($data, UserInterface $user = NULL) {
    $file = file_save_data($data, NULL, NULL);
    if ($file) {
      if ($user) {
        $file
          ->setOwner($user);
      }
      else {
        $file
          ->setOwner($this->adminUser);
      }

      // Change the file status to be temporary.
      $file
        ->setTemporary();

      // Save the changes.
      $file
        ->save();
    }
    return $file;
  }

  /**
   * Tests upload and remove buttons for a single-valued File field.
   */
  public function testSingleValuedWidget() {
    $node_storage = $this->container
      ->get('entity_type.manager')
      ->getStorage('node');
    $type_name = 'article';
    $field_name = strtolower($this
      ->randomMachineName());
    $this
      ->createFileField($field_name, 'node', $type_name);
    $test_file = $this
      ->getTestFile('text');

    // Create a new node with the uploaded file and ensure it got uploaded
    // successfully.
    $nid = $this
      ->uploadNodeFile($test_file, $field_name, $type_name);
    $node = $node_storage
      ->loadUnchanged($nid);
    $node_file = File::load($node->{$field_name}->target_id);
    $this
      ->assertFileExists($node_file
      ->getFileUri());

    // Ensure the file can be downloaded.
    $this
      ->drupalGet($node_file
      ->createFileUrl());
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Ensure the edit page has a remove button instead of an upload button.
    $this
      ->drupalGet("node/{$nid}/edit");
    $this
      ->assertSession()
      ->buttonNotExists('Upload');
    $this
      ->assertSession()
      ->buttonExists('Remove');
    $this
      ->submitForm([], 'Remove');

    // Ensure the page now has an upload button instead of a remove button.
    $this
      ->assertSession()
      ->buttonNotExists('Remove');
    $this
      ->assertSession()
      ->buttonExists('Upload');

    // Test label has correct 'for' attribute.
    $input = $this
      ->assertSession()
      ->fieldExists("files[{$field_name}_0]");
    $this
      ->assertSession()
      ->elementExists('xpath', '//label[@for="' . $input
      ->getAttribute('id') . '"]');

    // Save the node and ensure it does not have the file.
    $this
      ->submitForm([], 'Save');
    $node = $node_storage
      ->loadUnchanged($nid);
    $this
      ->assertTrue(empty($node->{$field_name}->target_id), 'File was successfully removed from the node.');
  }

  /**
   * Tests upload and remove buttons for multiple multi-valued File fields.
   */
  public function testMultiValuedWidget() {
    $node_storage = $this->container
      ->get('entity_type.manager')
      ->getStorage('node');
    $type_name = 'article';

    // Use explicit names instead of random names for those fields, because of a
    // bug in submitForm() with multiple file uploads in one form, where the
    // order of uploads depends on the order in which the upload elements are
    // added to the $form (which, in the current implementation of
    // FileStorage::listAll(), comes down to the alphabetical order on field
    // names).
    $field_name = 'test_file_field_1';
    $field_name2 = 'test_file_field_2';
    $cardinality = 3;
    $this
      ->createFileField($field_name, 'node', $type_name, [
      'cardinality' => $cardinality,
    ]);
    $this
      ->createFileField($field_name2, 'node', $type_name, [
      'cardinality' => $cardinality,
    ]);
    $test_file = $this
      ->getTestFile('text');

    // Visit the node creation form, and upload 3 files for each field. Since
    // the field has cardinality of 3, ensure the "Upload" button is displayed
    // until after the 3rd file, and after that, isn't displayed. Because
    // SimpleTest triggers the last button with a given name, so upload to the
    // second field first.
    $this
      ->drupalGet("node/add/{$type_name}");
    foreach ([
      $field_name2,
      $field_name,
    ] as $each_field_name) {
      for ($delta = 0; $delta < 3; $delta++) {
        $edit = [
          'files[' . $each_field_name . '_' . $delta . '][]' => \Drupal::service('file_system')
            ->realpath($test_file
            ->getFileUri()),
        ];

        // If the Upload button doesn't exist, submitForm() will
        // automatically fail with an assertion message.
        $this
          ->submitForm($edit, 'Upload');
      }
    }
    $this
      ->assertSession()
      ->buttonNotExists('Upload');
    $num_expected_remove_buttons = 6;
    foreach ([
      $field_name,
      $field_name2,
    ] as $current_field_name) {

      // How many uploaded files for the current field are remaining.
      $remaining = 3;

      // Test clicking each "Remove" button. For extra robustness, test them out
      // of sequential order. They are 0-indexed, and get renumbered after each
      // iteration, so array(1, 1, 0) means:
      // - First remove the 2nd file.
      // - Then remove what is then the 2nd file (was originally the 3rd file).
      // - Then remove the first file.
      foreach ([
        1,
        1,
        0,
      ] as $delta) {

        // Ensure we have the expected number of Remove buttons, and that they
        // are numbered sequentially.
        $buttons = $this
          ->xpath('//input[@type="submit" and @value="Remove"]');
        $this
          ->assertCount($num_expected_remove_buttons, $buttons, new FormattableMarkup('There are %n "Remove" buttons displayed.', [
          '%n' => $num_expected_remove_buttons,
        ]));
        foreach ($buttons as $i => $button) {
          $key = $i >= $remaining ? $i - $remaining : $i;
          $check_field_name = $field_name2;
          if ($current_field_name == $field_name && $i < $remaining) {
            $check_field_name = $field_name;
          }
          $this
            ->assertSame($check_field_name . '_' . $key . '_remove_button', $button
            ->getAttribute('name'));
        }

        // "Click" the remove button (emulating either a nojs or js submission).
        $button_name = $current_field_name . '_' . $delta . '_remove_button';
        $this
          ->getSession()
          ->getPage()
          ->findButton($button_name)
          ->press();
        $num_expected_remove_buttons--;
        $remaining--;

        // Ensure an "Upload" button for the current field is displayed with the
        // correct name.
        $upload_button_name = $current_field_name . '_' . $remaining . '_upload_button';
        $button = $this
          ->assertSession()
          ->buttonExists($upload_button_name);
        $this
          ->assertSame('Upload', $button
          ->getValue());

        // Ensure only at most one button per field is displayed.
        $expected = $current_field_name == $field_name ? 1 : 2;
        $this
          ->assertSession()
          ->elementsCount('xpath', '//input[@type="submit" and @value="Upload"]', $expected);
      }
    }

    // Ensure the page now has no Remove buttons.
    $this
      ->assertSession()
      ->buttonNotExists('Remove');

    // Save the node and ensure it does not have any files.
    $this
      ->submitForm([
      'title[0][value]' => $this
        ->randomMachineName(),
    ], 'Save');
    preg_match('/node\\/([0-9])/', $this
      ->getUrl(), $matches);
    $nid = $matches[1];
    $node = $node_storage
      ->loadUnchanged($nid);
    $this
      ->assertTrue(empty($node->{$field_name}->target_id), 'Node was successfully saved without any files.');

    // Try to upload more files than allowed on revision.
    $upload_files_node_revision = [
      $test_file,
      $test_file,
      $test_file,
      $test_file,
    ];
    foreach ($upload_files_node_revision as $i => $file) {
      $edit['files[test_file_field_1_0][' . $i . ']'] = \Drupal::service('file_system')
        ->realpath($test_file
        ->getFileUri());
    }

    // @todo: Replace after https://www.drupal.org/project/drupal/issues/2917885
    $this
      ->drupalGet('node/' . $node
      ->id() . '/edit');
    $this
      ->assertSession()
      ->fieldExists('files[test_file_field_1_0][]');
    $submit_xpath = $this
      ->assertSession()
      ->buttonExists('Save')
      ->getXpath();
    $client = $this
      ->getSession()
      ->getDriver()
      ->getClient();
    $form = $client
      ->getCrawler()
      ->filterXPath($submit_xpath)
      ->form();
    $client
      ->request($form
      ->getMethod(), $form
      ->getUri(), $form
      ->getPhpValues(), $edit);
    $node = $node_storage
      ->loadUnchanged($nid);
    $this
      ->assertCount($cardinality, $node->{$field_name}, 'More files than allowed could not be saved to node.');
    $upload_files_node_creation = [
      $test_file,
      $test_file,
    ];

    // Try to upload multiple files, but fewer than the maximum.
    $nid = $this
      ->uploadNodeFiles($upload_files_node_creation, $field_name, $type_name, TRUE, []);
    $node = $node_storage
      ->loadUnchanged($nid);
    $this
      ->assertSameSize($upload_files_node_creation, $node->{$field_name}, 'Node was successfully saved with multiple files.');

    // Try to upload exactly the allowed number of files on revision.
    $this
      ->uploadNodeFile($test_file, $field_name, $node
      ->id(), 1, [], TRUE);
    $node = $node_storage
      ->loadUnchanged($nid);
    $this
      ->assertCount($cardinality, $node->{$field_name}, 'Node was successfully revised to maximum number of files.');

    // Try to upload exactly the allowed number of files, new node.
    $upload_files = [
      $test_file,
      $test_file,
      $test_file,
    ];
    $nid = $this
      ->uploadNodeFiles($upload_files, $field_name, $type_name, TRUE, []);
    $node = $node_storage
      ->loadUnchanged($nid);
    $this
      ->assertCount($cardinality, $node->{$field_name}, 'Node was successfully saved with maximum number of files.');
  }

  /**
   * Tests a file field with a "Private files" upload destination setting.
   */
  public function testPrivateFileSetting() {
    $node_storage = $this->container
      ->get('entity_type.manager')
      ->getStorage('node');

    // Grant the admin user required permissions.
    user_role_grant_permissions($this->adminUser->roles[0]->target_id, [
      'administer node fields',
    ]);
    $type_name = 'article';
    $field_name = strtolower($this
      ->randomMachineName());
    $this
      ->createFileField($field_name, 'node', $type_name);
    $field = FieldConfig::loadByName('node', $type_name, $field_name);
    $field_id = $field
      ->id();
    $test_file = $this
      ->getTestFile('text');

    // Change the field setting to make its files private, and upload a file.
    $edit = [
      'settings[uri_scheme]' => 'private',
    ];
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}/storage");
    $this
      ->submitForm($edit, 'Save field settings');
    $nid = $this
      ->uploadNodeFile($test_file, $field_name, $type_name);
    $node = $node_storage
      ->loadUnchanged($nid);
    $node_file = File::load($node->{$field_name}->target_id);
    $this
      ->assertFileExists($node_file
      ->getFileUri());

    // Ensure the private file is available to the user who uploaded it.
    $this
      ->drupalGet($node_file
      ->createFileUrl());
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Ensure we can't change 'uri_scheme' field settings while there are some
    // entities with uploaded files.
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}/storage");
    $this
      ->assertSession()
      ->fieldDisabled("edit-settings-uri-scheme-public");

    // Delete node and confirm that setting could be changed.
    $node
      ->delete();
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}/storage");
    $this
      ->assertSession()
      ->fieldEnabled("edit-settings-uri-scheme-public");
  }

  /**
   * Tests that download restrictions on private files work on comments.
   */
  public function testPrivateFileComment() {
    $user = $this
      ->drupalCreateUser([
      'access comments',
    ]);

    // Grant the admin user required comment permissions.
    $roles = $this->adminUser
      ->getRoles();
    user_role_grant_permissions($roles[1], [
      'administer comment fields',
      'administer comments',
    ]);

    // Revoke access comments permission from anon user, grant post to
    // authenticated.
    user_role_revoke_permissions(RoleInterface::ANONYMOUS_ID, [
      'access comments',
    ]);
    user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, [
      'post comments',
      'skip comment approval',
    ]);

    // Create a new field.
    $this
      ->addDefaultCommentField('node', 'article');
    $name = strtolower($this
      ->randomMachineName());
    $label = $this
      ->randomMachineName();
    $storage_edit = [
      'settings[uri_scheme]' => 'private',
    ];
    $this
      ->fieldUIAddNewField('admin/structure/comment/manage/comment', $name, $label, 'file', $storage_edit);

    // Manually clear cache on the tester side.
    \Drupal::service('entity_field.manager')
      ->clearCachedFieldDefinitions();

    // Create node.
    $edit = [
      'title[0][value]' => $this
        ->randomMachineName(),
    ];
    $this
      ->drupalGet('node/add/article');
    $this
      ->submitForm($edit, 'Save');
    $node = $this
      ->drupalGetNodeByTitle($edit['title[0][value]']);

    // Add a comment with a file.
    $text_file = $this
      ->getTestFile('text');
    $edit = [
      'files[field_' . $name . '_' . 0 . ']' => \Drupal::service('file_system')
        ->realpath($text_file
        ->getFileUri()),
      'comment_body[0][value]' => $comment_body = $this
        ->randomMachineName(),
    ];
    $this
      ->drupalGet('node/' . $node
      ->id());
    $this
      ->submitForm($edit, 'Save');

    // Get the comment ID.
    preg_match('/comment-([0-9]+)/', $this
      ->getUrl(), $matches);
    $cid = $matches[1];

    // Log in as normal user.
    $this
      ->drupalLogin($user);
    $comment = Comment::load($cid);
    $comment_file = $comment->{'field_' . $name}->entity;
    $this
      ->assertFileExists($comment_file
      ->getFileUri());

    // Test authenticated file download.
    $url = $comment_file
      ->createFileUrl();
    $this
      ->assertNotNull($url, 'Confirmed that the URL is valid');
    $this
      ->drupalGet($comment_file
      ->createFileUrl());
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // Ensure that the anonymous user cannot download the file.
    $this
      ->drupalLogout();
    $this
      ->drupalGet($comment_file
      ->createFileUrl());
    $this
      ->assertSession()
      ->statusCodeEquals(403);

    // Unpublishes node.
    $this
      ->drupalLogin($this->adminUser);
    $edit = [
      'status[value]' => FALSE,
    ];
    $this
      ->drupalGet('node/' . $node
      ->id() . '/edit');
    $this
      ->submitForm($edit, 'Save');

    // Ensures normal user can no longer download the file.
    $this
      ->drupalLogin($user);
    $this
      ->drupalGet($comment_file
      ->createFileUrl());
    $this
      ->assertSession()
      ->statusCodeEquals(403);
  }

  /**
   * Tests validation with the Upload button.
   */
  public function testWidgetValidation() {
    $type_name = 'article';
    $field_name = strtolower($this
      ->randomMachineName());
    $this
      ->createFileField($field_name, 'node', $type_name);
    $this
      ->updateFileField($field_name, $type_name, [
      'file_extensions' => 'txt',
    ]);
    $type = 'nojs';

    // Create node and prepare files for upload.
    $node = $this
      ->drupalCreateNode([
      'type' => 'article',
    ]);
    $nid = $node
      ->id();
    $this
      ->drupalGet("node/{$nid}/edit");
    $test_file_text = $this
      ->getTestFile('text');
    $test_file_image = $this
      ->getTestFile('image');
    $name = 'files[' . $field_name . '_0]';

    // Upload file with incorrect extension, check for validation error.
    $edit[$name] = \Drupal::service('file_system')
      ->realpath($test_file_image
      ->getFileUri());
    $this
      ->submitForm($edit, 'Upload');
    $this
      ->assertSession()
      ->pageTextContains("Only files with the following extensions are allowed: txt.");

    // Upload file with correct extension, check that error message is removed.
    $edit[$name] = \Drupal::service('file_system')
      ->realpath($test_file_text
      ->getFileUri());
    $this
      ->submitForm($edit, 'Upload');
    $this
      ->assertSession()
      ->pageTextNotContains("Only files with the following extensions are allowed: txt.");
  }

  /**
   * Tests file widget element.
   */
  public function testWidgetElement() {
    $field_name = mb_strtolower($this
      ->randomMachineName());
    $html_name = str_replace('_', '-', $field_name);
    $this
      ->createFileField($field_name, 'node', 'article', [
      'cardinality' => FieldStorageConfig::CARDINALITY_UNLIMITED,
    ]);
    $file = $this
      ->getTestFile('text');
    $xpath = "//details[@data-drupal-selector='edit-{$html_name}']/div[@class='details-wrapper']/table";
    $this
      ->drupalGet('node/add/article');
    $elements = $this
      ->xpath($xpath);

    // If the field has no item, the table should not be visible.
    $this
      ->assertCount(0, $elements);

    // Upload a file.
    $edit['files[' . $field_name . '_0][]'] = $this->container
      ->get('file_system')
      ->realpath($file
      ->getFileUri());
    $this
      ->submitForm($edit, "{$field_name}_0_upload_button");
    $elements = $this
      ->xpath($xpath);

    // If the field has at least one item, the table should be visible.
    $this
      ->assertCount(1, $elements);

    // Test for AJAX error when using progress bar on file field widget.
    $http_client = $this
      ->getHttpClient();
    $key = $this
      ->randomMachineName();
    $post_request = $http_client
      ->request('POST', $this
      ->buildUrl('file/progress/' . $key), [
      'headers' => [
        'Accept' => 'application/json',
        'Content-Type' => 'application/x-www-form-urlencoded',
      ],
      'http_errors' => FALSE,
    ]);
    $this
      ->assertNotEquals(500, $post_request
      ->getStatusCode());
    $body = Json::decode($post_request
      ->getBody());
    $this
      ->assertStringContainsString('Starting upload...', $body['message']);
  }

  /**
   * Tests exploiting the temporary file removal of another user using fid.
   */
  public function testTemporaryFileRemovalExploit() {

    // Create a victim user.
    $victim_user = $this
      ->drupalCreateUser();

    // Create an attacker user.
    $attacker_user = $this
      ->drupalCreateUser([
      'access content',
      'create article content',
      'edit any article content',
    ]);

    // Log in as the attacker user.
    $this
      ->drupalLogin($attacker_user);

    // Perform tests using the newly created users.
    $this
      ->doTestTemporaryFileRemovalExploit($victim_user, $attacker_user);
  }

  /**
   * Tests exploiting the temporary file removal for anonymous users using fid.
   */
  public function testTemporaryFileRemovalExploitAnonymous() {

    // Set up an anonymous victim user.
    $victim_user = User::getAnonymousUser();

    // Set up an anonymous attacker user.
    $attacker_user = User::getAnonymousUser();

    // Set up permissions for anonymous attacker user.
    user_role_change_permissions(RoleInterface::ANONYMOUS_ID, [
      'access content' => TRUE,
      'create article content' => TRUE,
      'edit any article content' => TRUE,
    ]);

    // Log out so as to be the anonymous attacker user.
    $this
      ->drupalLogout();

    // Perform tests using the newly set up anonymous users.
    $this
      ->doTestTemporaryFileRemovalExploit($victim_user, $attacker_user);
  }

  /**
   * Tests maximum upload file size validation.
   */
  public function testMaximumUploadFileSizeValidation() {

    // Grant the admin user required permissions.
    user_role_grant_permissions($this->adminUser->roles[0]->target_id, [
      'administer node fields',
    ]);
    $type_name = 'article';
    $field_name = strtolower($this
      ->randomMachineName());
    $this
      ->createFileField($field_name, 'node', $type_name);

    /** @var \Drupal\Field\FieldConfigInterface $field */
    $field = FieldConfig::loadByName('node', $type_name, $field_name);
    $field_id = $field
      ->id();
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}");

    // Tests that form validation trims the user input.
    $edit = [
      'settings[max_filesize]' => ' 5.1 megabytes ',
    ];
    $this
      ->submitForm($edit, 'Save settings');
    $this
      ->assertSession()
      ->pageTextContains('Saved ' . $field_name . ' configuration.');

    // Reload the field config to check for the saved value.

    /** @var \Drupal\Field\FieldConfigInterface $field */
    $field = FieldConfig::loadByName('node', $type_name, $field_name);
    $settings = $field
      ->getSettings();
    $this
      ->assertEquals('5.1 megabytes', $settings['max_filesize'], 'The max filesize value had been trimmed on save.');
  }

  /**
   * Tests configuring file field's allowed file extensions setting.
   */
  public function testFileExtensionsSetting() {

    // Grant the admin user required permissions.
    user_role_grant_permissions($this->adminUser->roles[0]->target_id, [
      'administer node fields',
    ]);
    $type_name = 'article';
    $field_name = strtolower($this
      ->randomMachineName());
    $this
      ->createFileField($field_name, 'node', $type_name);
    $field = FieldConfig::loadByName('node', $type_name, $field_name);
    $field_id = $field
      ->id();

    // By default allowing .php files without .txt is not permitted.
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}");
    $edit = [
      'settings[file_extensions]' => 'jpg php',
    ];
    $this
      ->submitForm($edit, 'Save settings');
    $this
      ->assertSession()
      ->pageTextContains('Add txt to the list of allowed extensions to securely upload files with a php extension. The txt extension will then be added automatically.');

    // Test allowing .php and .txt.
    $edit = [
      'settings[file_extensions]' => 'jpg php txt',
    ];
    $this
      ->submitForm($edit, 'Save settings');
    $this
      ->assertSession()
      ->pageTextContains('Saved ' . $field_name . ' configuration.');

    // If the system is configured to allow insecure uploads, .txt is not
    // required when allowing .php.
    $this
      ->config('system.file')
      ->set('allow_insecure_uploads', TRUE)
      ->save();
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}");
    $edit = [
      'settings[file_extensions]' => 'jpg php',
    ];
    $this
      ->submitForm($edit, 'Save settings');
    $this
      ->assertSession()
      ->pageTextContains('Saved ' . $field_name . ' configuration.');

    // Check that a file extension with an underscore can be configured.
    $edit = [
      'settings[file_extensions]' => 'x_t x.t xt x_y_t',
    ];
    $this
      ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}");
    $this
      ->submitForm($edit, 'Save settings');
    $field = FieldConfig::loadByName('node', $type_name, $field_name);
    $this
      ->assertEquals('x_t x.t xt x_y_t', $field
      ->getSetting('file_extensions'));

    // Check that a file field with an invalid value in allowed extensions
    // property throws an error message.
    $invalid_extensions = [
      'x_.t',
      'x._t',
      'xt_',
      'x__t',
      '_xt',
    ];
    foreach ($invalid_extensions as $value) {
      $edit = [
        'settings[file_extensions]' => $value,
      ];
      $this
        ->drupalGet("admin/structure/types/manage/{$type_name}/fields/{$field_id}");
      $this
        ->submitForm($edit, 'Save settings');
      $this
        ->assertSession()
        ->pageTextContains("The list of allowed extensions is not valid. Allowed characters are a-z, 0-9, '.', and '_'. The first and last characters cannot be '.' or '_', and these two characters cannot appear next to each other. Separate extensions with a comma or space.");
    }
  }

  /**
   * Helper for testing exploiting the temporary file removal using fid.
   *
   * @param \Drupal\user\UserInterface $victim_user
   *   The victim user.
   * @param \Drupal\user\UserInterface $attacker_user
   *   The attacker user.
   */
  protected function doTestTemporaryFileRemovalExploit(UserInterface $victim_user, UserInterface $attacker_user) {
    $type_name = 'article';
    $field_name = 'test_file_field';
    $this
      ->createFileField($field_name, 'node', $type_name);
    $test_file = $this
      ->getTestFile('text');
    $type = 'no-js';

    // Create a temporary file owned by the victim user. This will be as if
    // they had uploaded the file, but not saved the node they were editing
    // or creating.
    $victim_tmp_file = $this
      ->createTemporaryFile('some text', $victim_user);
    $victim_tmp_file = File::load($victim_tmp_file
      ->id());
    $this
      ->assertTrue($victim_tmp_file
      ->isTemporary(), 'New file saved to disk is temporary.');
    $this
      ->assertFalse(empty($victim_tmp_file
      ->id()), 'New file has an fid.');
    $this
      ->assertEquals($victim_user
      ->id(), $victim_tmp_file
      ->getOwnerId(), 'New file belongs to the victim.');

    // Have attacker create a new node with a different uploaded file and
    // ensure it got uploaded successfully.
    $edit = [
      'title[0][value]' => $type . '-title',
    ];

    // Attach a file to a node.
    $edit['files[' . $field_name . '_0]'] = $this->container
      ->get('file_system')
      ->realpath($test_file
      ->getFileUri());
    $this
      ->drupalGet(Url::fromRoute('node.add', [
      'node_type' => $type_name,
    ]));
    $this
      ->submitForm($edit, 'Save');
    $node = $this
      ->drupalGetNodeByTitle($edit['title[0][value]']);

    /** @var \Drupal\file\FileInterface $node_file */
    $node_file = File::load($node->{$field_name}->target_id);
    $this
      ->assertFileExists($node_file
      ->getFileUri());
    $this
      ->assertEquals($attacker_user
      ->id(), $node_file
      ->getOwnerId(), 'New file belongs to the attacker.');

    // Ensure the file can be downloaded.
    $this
      ->drupalGet($node_file
      ->createFileUrl());
    $this
      ->assertSession()
      ->statusCodeEquals(200);

    // "Click" the remove button (emulating either a nojs or js submission).
    // In this POST request, the attacker "guesses" the fid of the victim's
    // temporary file and uses that to remove this file.
    $this
      ->drupalGet($node
      ->toUrl('edit-form'));
    $file_id_field = $this
      ->assertSession()
      ->hiddenFieldExists($field_name . '[0][fids]');
    $file_id_field
      ->setValue((string) $victim_tmp_file
      ->id());
    $this
      ->submitForm([], 'Remove');

    // The victim's temporary file should not be removed by the attacker's
    // POST request.
    $this
      ->assertFileExists($victim_tmp_file
      ->getFileUri());
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AssertLegacyTrait::assert Deprecated	protected	function
AssertLegacyTrait::assertCacheTag Deprecated	protected	function	Asserts whether an expected cache tag was present in the last response.
AssertLegacyTrait::assertElementNotPresent Deprecated	protected	function	Asserts that the element with the given CSS selector is not present.
AssertLegacyTrait::assertElementPresent Deprecated	protected	function	Asserts that the element with the given CSS selector is present.
AssertLegacyTrait::assertEqual Deprecated	protected	function
AssertLegacyTrait::assertEscaped Deprecated	protected	function	Passes if the raw text IS found escaped on the loaded page, fail otherwise.
AssertLegacyTrait::assertField Deprecated	protected	function	Asserts that a field exists with the given name or ID.
AssertLegacyTrait::assertFieldById Deprecated	protected	function	Asserts that a field exists with the given ID and value.
AssertLegacyTrait::assertFieldByName Deprecated	protected	function	Asserts that a field exists with the given name and value.
AssertLegacyTrait::assertFieldByXPath Deprecated	protected	function	Asserts that a field exists in the current page by the given XPath.
AssertLegacyTrait::assertFieldChecked Deprecated	protected	function	Asserts that a checkbox field in the current page is checked.
AssertLegacyTrait::assertFieldsByValue Deprecated	protected	function	Asserts that a field exists in the current page with a given Xpath result.
AssertLegacyTrait::assertHeader Deprecated	protected	function	Checks that current response header equals value.
AssertLegacyTrait::assertIdentical Deprecated	protected	function
AssertLegacyTrait::assertIdenticalObject Deprecated	protected	function
AssertLegacyTrait::assertLink Deprecated	protected	function	Passes if a link with the specified label is found.
AssertLegacyTrait::assertLinkByHref Deprecated	protected	function	Passes if a link containing a given href (part) is found.
AssertLegacyTrait::assertNoCacheTag Deprecated	protected	function	Asserts whether an expected cache tag was absent in the last response.
AssertLegacyTrait::assertNoEscaped Deprecated	protected	function	Passes if the raw text is not found escaped on the loaded page.
AssertLegacyTrait::assertNoField Deprecated	protected	function	Asserts that a field does NOT exist with the given name or ID.
AssertLegacyTrait::assertNoFieldById Deprecated	protected	function	Asserts that a field does not exist with the given ID and value.
AssertLegacyTrait::assertNoFieldByName Deprecated	protected	function	Asserts that a field does not exist with the given name and value.
AssertLegacyTrait::assertNoFieldByXPath Deprecated	protected	function	Asserts that a field does not exist or its value does not match, by XPath.
AssertLegacyTrait::assertNoFieldChecked Deprecated	protected	function	Asserts that a checkbox field in the current page is not checked.
AssertLegacyTrait::assertNoLink Deprecated	protected	function	Passes if a link with the specified label is not found.
AssertLegacyTrait::assertNoLinkByHref Deprecated	protected	function	Passes if a link containing a given href (part) is not found.
AssertLegacyTrait::assertNoOption Deprecated	protected	function	Asserts that a select option does NOT exist in the current page.
AssertLegacyTrait::assertNoPattern Deprecated	protected	function	Triggers a pass if the Perl regex pattern is not found in the raw content.
AssertLegacyTrait::assertNoRaw Deprecated	protected	function	Passes if the raw text IS not found on the loaded page, fail otherwise.
AssertLegacyTrait::assertNotEqual Deprecated	protected	function
AssertLegacyTrait::assertNoText Deprecated	protected	function	Passes if the page (with HTML stripped) does not contains the text.
AssertLegacyTrait::assertNotIdentical Deprecated	protected	function
AssertLegacyTrait::assertNoUniqueText Deprecated	protected	function	Passes if the text is found MORE THAN ONCE on the text version of the page.
AssertLegacyTrait::assertOption Deprecated	protected	function	Asserts that a select option in the current page exists.
AssertLegacyTrait::assertOptionByText Deprecated	protected	function	Asserts that a select option with the visible text exists.
AssertLegacyTrait::assertOptionSelected Deprecated	protected	function	Asserts that a select option in the current page is checked.
AssertLegacyTrait::assertPattern Deprecated	protected	function	Triggers a pass if the Perl regex pattern is found in the raw content.
AssertLegacyTrait::assertRaw Deprecated	protected	function	Passes if the raw text IS found on the loaded page, fail otherwise.
AssertLegacyTrait::assertResponse Deprecated	protected	function	Asserts the page responds with the specified response code.
AssertLegacyTrait::assertText Deprecated	protected	function	Passes if the page (with HTML stripped) contains the text.
AssertLegacyTrait::assertTextHelper Deprecated	protected	function	Helper for assertText and assertNoText.
AssertLegacyTrait::assertTitle Deprecated	protected	function	Pass if the page title is the given string.
AssertLegacyTrait::assertUniqueText Deprecated	protected	function	Passes if the text is found ONLY ONCE on the text version of the page.
AssertLegacyTrait::assertUrl Deprecated	protected	function	Passes if the internal browser's URL matches the given path.
AssertLegacyTrait::buildXPathQuery Deprecated	protected	function	Builds an XPath query.
AssertLegacyTrait::constructFieldXpath Deprecated	protected	function	Helper: Constructs an XPath for the given set of attributes and value.
AssertLegacyTrait::getAllOptions Deprecated	protected	function	Get all option elements, including nested options, in a select.
AssertLegacyTrait::getRawContent Deprecated	protected	function	Gets the current raw content.
AssertLegacyTrait::pass Deprecated	protected	function
AssertLegacyTrait::verbose Deprecated	protected	function
BlockCreationTrait::placeBlock	protected	function	Creates a block instance based on default settings. Aliased as: drupalPlaceBlock
BrowserHtmlDebugTrait::$htmlOutputBaseUrl	protected	property	The Base URI to use for links to the output files.
BrowserHtmlDebugTrait::$htmlOutputClassName	protected	property	Class name for HTML output logging.
BrowserHtmlDebugTrait::$htmlOutputCounter	protected	property	Counter for HTML output logging.
BrowserHtmlDebugTrait::$htmlOutputCounterStorage	protected	property	Counter storage for HTML output logging.
BrowserHtmlDebugTrait::$htmlOutputDirectory	protected	property	Directory name for HTML output logging.
BrowserHtmlDebugTrait::$htmlOutputEnabled	protected	property	HTML output output enabled.
BrowserHtmlDebugTrait::$htmlOutputFile	protected	property	The file name to write the list of URLs to.
BrowserHtmlDebugTrait::$htmlOutputTestId	protected	property	HTML output test ID.
BrowserHtmlDebugTrait::formatHtmlOutputHeaders	protected	function	Formats HTTP headers as string for HTML output logging.
BrowserHtmlDebugTrait::getHtmlOutputHeaders	protected	function	Returns headers in HTML output format.	1
BrowserHtmlDebugTrait::getResponseLogHandler	protected	function	Provides a Guzzle middleware handler to log every response received.
BrowserHtmlDebugTrait::htmlOutput	protected	function	Logs a HTML output message in a text file.
BrowserHtmlDebugTrait::initBrowserOutputFile	protected	function	Creates the directory to store browser output.
BrowserTestBase::$baseUrl	protected	property	The base URL.
BrowserTestBase::$configImporter	protected	property	The config importer that can be used in a test.
BrowserTestBase::$customTranslations	protected	property	An array of custom translations suitable for drupal_rewrite_settings().
BrowserTestBase::$databasePrefix	protected	property	The database prefix of this test run.
BrowserTestBase::$mink	protected	property	Mink session manager.
BrowserTestBase::$minkDefaultDriverArgs	protected	property	Mink default driver params.
BrowserTestBase::$minkDefaultDriverClass	protected	property	Mink class for the default driver to use.	1
BrowserTestBase::$originalContainer	protected	property	The original container.
BrowserTestBase::$originalShutdownCallbacks	protected	property	The original array of shutdown function callbacks.
BrowserTestBase::$preserveGlobalState	protected	property
BrowserTestBase::$profile	protected	property	The profile to install as a basis for testing.	39
BrowserTestBase::$root	protected	property	The app root.
BrowserTestBase::$runTestInSeparateProcess	protected	property	Browser tests are run in separate processes to prevent collisions between code that may be loaded by tests.
BrowserTestBase::$timeLimit	protected	property	Time limit in seconds for the test.
BrowserTestBase::$translationFilesDirectory	protected	property	The translation file directory for the test environment.
BrowserTestBase::cleanupEnvironment	protected	function	Clean up the Simpletest environment.
BrowserTestBase::config	protected	function	Configuration accessor for tests. Returns non-overridden configuration.
BrowserTestBase::drupalGetHeader Deprecated	protected	function	Gets the value of an HTTP response header.
BrowserTestBase::filePreDeleteCallback	public static	function	Ensures test files are deletable.
BrowserTestBase::getDefaultDriverInstance	protected	function	Gets an instance of the default Mink driver.
BrowserTestBase::getDrupalSettings	protected	function	Gets the JavaScript drupalSettings variable for the currently-loaded page.	1
BrowserTestBase::getHttpClient	protected	function	Obtain the HTTP client for the system under test.
BrowserTestBase::getMinkDriverArgs	protected	function	Get the Mink driver args from an environment variable, if it is set. Can be overridden in a derived class so it is possible to use a different value for a subset of tests, e.g. the JavaScript tests.	1
BrowserTestBase::getOptions	protected	function	Helper function to get the options of select field.
BrowserTestBase::getSession	public	function	Returns Mink session.
BrowserTestBase::getSessionCookies	protected	function	Get session cookies from current session.
BrowserTestBase::getTestMethodCaller	protected	function	Retrieves the current calling line in the class under test. Overrides BrowserHtmlDebugTrait::getTestMethodCaller
BrowserTestBase::initFrontPage	protected	function	Visits the front page when initializing Mink.	3
BrowserTestBase::initMink	protected	function	Initializes Mink sessions.	1
BrowserTestBase::installDrupal	public	function	Installs Drupal into the Simpletest site.	1
BrowserTestBase::registerSessions	protected	function	Registers additional Mink sessions.
BrowserTestBase::setUpAppRoot	protected	function	Sets up the root application path.
BrowserTestBase::setUpBeforeClass	public static	function		1
BrowserTestBase::tearDown	protected	function		3
BrowserTestBase::translatePostValues	protected	function	Transforms a nested array into a flat array suitable for submitForm().
BrowserTestBase::xpath	protected	function	Performs an xpath search on the contents of the internal browser.
BrowserTestBase::__sleep	public	function	Prevents serializing any properties.
CommentTestTrait::addDefaultCommentField	public	function	Adds the default comment field to an entity.
ConfigTestTrait::configImporter	protected	function	Returns a ConfigImporter object to import test configuration.
ConfigTestTrait::copyConfig	protected	function	Copies configuration objects from source storage to target storage.
ContentTypeCreationTrait::createContentType	protected	function	Creates a custom content type based on default settings. Aliased as: drupalCreateContentType	1
ExtensionListTestTrait::getModulePath	protected	function	Gets the path for the specified module.
ExtensionListTestTrait::getThemePath	protected	function	Gets the path for the specified theme.
FieldUiTestTrait::fieldUIAddExistingField	public	function	Adds an existing field through the Field UI.
FieldUiTestTrait::fieldUIAddNewField	public	function	Creates a new field through the Field UI.
FieldUiTestTrait::fieldUIDeleteField	public	function	Deletes a field through the Field UI.
FileFieldCreationTrait::attachFileField	public	function	Attaches a file field to an entity.
FileFieldCreationTrait::createFileField	public	function	Creates a new file field.
FileFieldTestBase::$adminUser	protected	property	A user with administration permissions.
FileFieldTestBase::assertFileEntryExists	public	function	Asserts that a file exists in the database.
FileFieldTestBase::assertFileEntryNotExists	public	function	Asserts that a file does not exist in the database.
FileFieldTestBase::assertFileIsPermanent	public	function	Asserts that a file's status is set to permanent in the database.
FileFieldTestBase::getLastFileId	public	function	Retrieves the fid of the last inserted file.
FileFieldTestBase::getTestFile	public	function	Retrieves a sample file of the specified type.
FileFieldTestBase::removeNodeFile	public	function	Removes a file from a node.
FileFieldTestBase::replaceNodeFile	public	function	Replaces a file within a node.
FileFieldTestBase::updateFileField	public	function	Updates an existing file field with new settings.
FileFieldTestBase::uploadNodeFile	public	function	Uploads a file to a node.
FileFieldTestBase::uploadNodeFiles	public	function	Uploads multiple files to a node.
FileFieldWidgetTest::$defaultTheme	protected	property	The theme to install as the default for testing. Overrides BrowserTestBase::$defaultTheme
FileFieldWidgetTest::$modules	protected static	property	Modules to enable. Overrides FileFieldTestBase::$modules
FileFieldWidgetTest::createTemporaryFile	protected	function	Creates a temporary file, for a specific user.
FileFieldWidgetTest::doTestTemporaryFileRemovalExploit	protected	function	Helper for testing exploiting the temporary file removal using fid.
FileFieldWidgetTest::setUp	protected	function	Overrides FileFieldTestBase::setUp
FileFieldWidgetTest::testFileExtensionsSetting	public	function	Tests configuring file field's allowed file extensions setting.
FileFieldWidgetTest::testMaximumUploadFileSizeValidation	public	function	Tests maximum upload file size validation.
FileFieldWidgetTest::testMultiValuedWidget	public	function	Tests upload and remove buttons for multiple multi-valued File fields.
FileFieldWidgetTest::testPrivateFileComment	public	function	Tests that download restrictions on private files work on comments.
FileFieldWidgetTest::testPrivateFileSetting	public	function	Tests a file field with a "Private files" upload destination setting.
FileFieldWidgetTest::testSingleValuedWidget	public	function	Tests upload and remove buttons for a single-valued File field.
FileFieldWidgetTest::testTemporaryFileRemovalExploit	public	function	Tests exploiting the temporary file removal of another user using fid.
FileFieldWidgetTest::testTemporaryFileRemovalExploitAnonymous	public	function	Tests exploiting the temporary file removal for anonymous users using fid.
FileFieldWidgetTest::testWidgetElement	public	function	Tests file widget element.
FileFieldWidgetTest::testWidgetValidation	public	function	Tests validation with the Upload button.
FunctionalTestSetupTrait::$apcuEnsureUniquePrefix	protected	property	The flag to set 'apcu_ensure_unique_prefix' setting.	1
FunctionalTestSetupTrait::$classLoader	protected	property	The class loader to use for installation and initialization of setup.
FunctionalTestSetupTrait::$rootUser	protected	property	The "#1" admin user.
FunctionalTestSetupTrait::doInstall	protected	function	Execute the non-interactive installer.	1
FunctionalTestSetupTrait::getDatabaseTypes	protected	function	Returns all supported database driver installer objects.
FunctionalTestSetupTrait::initConfig	protected	function	Initialize various configurations post-installation.	1
FunctionalTestSetupTrait::initKernel	protected	function	Initializes the kernel after installation.
FunctionalTestSetupTrait::initSettings	protected	function	Initialize settings created during install.
FunctionalTestSetupTrait::initUserSession	protected	function	Initializes user 1 for the site to be installed.
FunctionalTestSetupTrait::installDefaultThemeFromClassProperty	protected	function	Installs the default theme defined by `static::$defaultTheme` when needed.
FunctionalTestSetupTrait::installModulesFromClassProperty	protected	function	Install modules defined by `static::$modules`.	1
FunctionalTestSetupTrait::installParameters	protected	function	Returns the parameters that will be used when Simpletest installs Drupal.	9
FunctionalTestSetupTrait::prepareEnvironment	protected	function	Prepares the current environment for running the test.	20
FunctionalTestSetupTrait::prepareRequestForGenerator	protected	function	Creates a mock request and sets it on the generator.
FunctionalTestSetupTrait::prepareSettings	protected	function	Prepares site settings and services before installation.	2
FunctionalTestSetupTrait::rebuildAll	protected	function	Resets and rebuilds the environment after setup.
FunctionalTestSetupTrait::rebuildContainer	protected	function	Rebuilds \Drupal::getContainer().
FunctionalTestSetupTrait::resetAll	protected	function	Resets all data structures after having enabled new modules.
FunctionalTestSetupTrait::setContainerParameter	protected	function	Changes parameters in the services.yml file.
FunctionalTestSetupTrait::setupBaseUrl	protected	function	Sets up the base URL based upon the environment variable.
FunctionalTestSetupTrait::writeSettings	protected	function	Rewrites the settings.php file of the test site.	1
NodeCreationTrait::createNode	protected	function	Creates a node based on default settings. Aliased as: drupalCreateNode
NodeCreationTrait::getNodeByTitle	public	function	Get a node from the database based on its title. Aliased as: drupalGetNodeByTitle
PhpUnitWarnings::$deprecationWarnings	private static	property	Deprecation warnings from PHPUnit to raise with @trigger_error().
PhpUnitWarnings::addWarning	public	function	Converts PHPUnit deprecation warnings to E_USER_DEPRECATED.
RandomGeneratorTrait::$randomGenerator	protected	property	The random generator.
RandomGeneratorTrait::getRandomGenerator	protected	function	Gets the random generator for the utility methods.
RandomGeneratorTrait::randomMachineName	protected	function	Generates a unique random string containing letters and numbers.	1
RandomGeneratorTrait::randomObject	public	function	Generates a random PHP object.
RandomGeneratorTrait::randomString	public	function	Generates a pseudo-random string of ASCII characters of codes 32 to 126.
RandomGeneratorTrait::randomStringValidate	public	function	Callback for random string validation.
RefreshVariablesTrait::refreshVariables	protected	function	Refreshes in-memory configuration and state information.	1
SessionTestTrait::$sessionName	protected	property	The name of the session cookie.
SessionTestTrait::generateSessionName	protected	function	Generates a session cookie name.
SessionTestTrait::getSessionName	protected	function	Returns the session name in use on the child site.
StorageCopyTrait::replaceStorageContents	protected static	function	Copy the configuration from one storage to another and remove stale items.
TestFileCreationTrait::$generatedTestFiles	protected	property	Whether the files were copied to the test files directory.
TestFileCreationTrait::compareFiles	protected	function	Compares two files based on size and file name.
TestFileCreationTrait::generateFile	public static	function	Generates a test file.
TestFileCreationTrait::getTestFiles	protected	function	Gets a list of files that can be used in tests. Aliased as: drupalGetTestFiles
TestRequirementsTrait::checkModuleRequirements	private	function	Checks missing module requirements.
TestRequirementsTrait::checkRequirements	protected	function	Check module requirements for the Drupal use case.	1
TestRequirementsTrait::getDrupalRoot	protected static	function	Returns the Drupal root directory.
TestSetupTrait::$configSchemaCheckerExclusions	protected static	property	An array of config object names that are excluded from schema checking.
TestSetupTrait::$container	protected	property	The dependency injection container used in the test.
TestSetupTrait::$kernel	protected	property	The DrupalKernel instance used in the test.
TestSetupTrait::$originalSite	protected	property	The site directory of the original parent site.
TestSetupTrait::$privateFilesDirectory	protected	property	The private file directory for the test environment.
TestSetupTrait::$publicFilesDirectory	protected	property	The public file directory for the test environment.
TestSetupTrait::$siteDirectory	protected	property	The site directory of this test run.
TestSetupTrait::$strictConfigSchema	protected	property	Set to TRUE to strict check all configuration saved.	1
TestSetupTrait::$tempFilesDirectory	protected	property	The temporary file directory for the test environment.
TestSetupTrait::$testId	protected	property	The test run ID.
TestSetupTrait::changeDatabasePrefix	protected	function	Changes the database connection to the prefixed one.
TestSetupTrait::getConfigSchemaExclusions	protected	function	Gets the config schema exclusions for this test.
TestSetupTrait::getDatabaseConnection	public static	function	Returns the database connection to the site running Simpletest.
TestSetupTrait::prepareDatabasePrefix	protected	function	Generates a database prefix for running tests.	1
UiHelperTrait::$loggedInUser	protected	property	The current user logged in using the Mink controlled browser.
UiHelperTrait::$maximumMetaRefreshCount	protected	property	The number of meta refresh redirects to follow, or NULL if unlimited.
UiHelperTrait::$metaRefreshCount	protected	property	The number of meta refresh redirects followed during ::drupalGet().
UiHelperTrait::assertSession	public	function	Returns WebAssert object.	1
UiHelperTrait::buildUrl	protected	function	Builds an absolute URL from a system path or a URL object.
UiHelperTrait::checkForMetaRefresh	protected	function	Checks for meta refresh tag and if found call drupalGet() recursively.
UiHelperTrait::click	protected	function	Clicks the element with the given CSS selector.
UiHelperTrait::clickLink	protected	function	Follows a link by complete name.
UiHelperTrait::cssSelect	protected	function	Searches elements using a CSS selector in the raw content.
UiHelperTrait::cssSelectToXpath	protected	function	Translates a CSS expression to its XPath equivalent.
UiHelperTrait::drupalGet	protected	function	Retrieves a Drupal path or an absolute path.	2
UiHelperTrait::drupalLogin	protected	function	Logs in a user using the Mink controlled browser.
UiHelperTrait::drupalLogout	protected	function	Logs a user out of the Mink controlled browser and confirms.
UiHelperTrait::drupalPostForm Deprecated	protected	function	Executes a form submission.
UiHelperTrait::drupalUserIsLoggedIn	protected	function	Returns whether a given user account is logged in.
UiHelperTrait::getAbsoluteUrl	protected	function	Takes a path and returns an absolute path.
UiHelperTrait::getTextContent	protected	function	Retrieves the plain-text content from the current page.
UiHelperTrait::getUrl	protected	function	Get the current URL from the browser.
UiHelperTrait::isTestUsingGuzzleClient	protected	function	Determines if test is using DrupalTestBrowser.
UiHelperTrait::prepareRequest	protected	function	Prepare for a request to testing site.	1
UiHelperTrait::submitForm	protected	function	Fills and submits a form.
UserCreationTrait::checkPermissions	protected	function	Checks whether a given list of permission names is valid.
UserCreationTrait::createAdminRole	protected	function	Creates an administrative role.
UserCreationTrait::createRole	protected	function	Creates a role with specified permissions. Aliased as: drupalCreateRole
UserCreationTrait::createUser	protected	function	Create a user with a given set of permissions. Aliased as: drupalCreateUser
UserCreationTrait::grantPermissions	protected	function	Grant permissions to a user role.
UserCreationTrait::setCurrentUser	protected	function	Switch the current logged in user.
UserCreationTrait::setUpCurrentUser	protected	function	Creates a random user account and sets it as current user.
XdebugRequestTrait::extractCookiesFromRequest	protected	function	Adds xdebug cookies, from request setup.

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class FileFieldWidgetTest in Drupal 9

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