Test case for typical Drupal tests.

Hierarchy

Expanded class hierarchy of DrupalWebTestCase

File

modules/simpletest/drupal_web_test_case.php, line 807

View source
class DrupalWebTestCase extends DrupalTestCase {

  /**
   * The profile to install as a basis for testing.
   *
   * @var string
   */
  protected $profile = 'standard';

  /**
   * The URL currently loaded in the internal browser.
   *
   * @var string
   */
  protected $url;

  /**
   * The handle of the current cURL connection.
   *
   * @var resource
   */
  protected $curlHandle;

  /**
   * The headers of the page currently loaded in the internal browser.
   *
   * @var Array
   */
  protected $headers;

  /**
   * The content of the page currently loaded in the internal browser.
   *
   * @var string
   */
  protected $content;

  /**
   * The content of the page currently loaded in the internal browser (plain text version).
   *
   * @var string
   */
  protected $plainTextContent;

  /**
   * The value of the Drupal.settings JavaScript variable for the page currently loaded in the internal browser.
   *
   * @var Array
   */
  protected $drupalSettings;

  /**
   * The parsed version of the page.
   *
   * @var SimpleXMLElement
   */
  protected $elements = NULL;

  /**
   * The current user logged in using the internal browser.
   *
   * @var bool
   */
  protected $loggedInUser = FALSE;

  /**
   * The current cookie file used by cURL.
   *
   * We do not reuse the cookies in further runs, so we do not need a file
   * but we still need cookie handling, so we set the jar to NULL.
   */
  protected $cookieFile = NULL;

  /**
   * The cookies of the page currently loaded in the internal browser.
   *
   * @var array
   */
  protected $cookies = array();

  /**
   * Additional cURL options.
   *
   * DrupalWebTestCase itself never sets this but always obeys what is set.
   */
  protected $additionalCurlOptions = array();

  /**
   * The original user, before it was changed to a clean uid = 1 for testing purposes.
   *
   * @var object
   */
  protected $originalUser = NULL;

  /**
   * The original shutdown handlers array, before it was cleaned for testing purposes.
   *
   * @var array
   */
  protected $originalShutdownCallbacks = array();

  /**
   * HTTP authentication method
   */
  protected $httpauth_method = CURLAUTH_BASIC;

  /**
   * HTTP authentication credentials (<username>:<password>).
   */
  protected $httpauth_credentials = NULL;

  /**
   * The current session name, if available.
   */
  protected $session_name = NULL;

  /**
   * The current session ID, if available.
   */
  protected $session_id = NULL;

  /**
   * Whether the files were copied to the test files directory.
   */
  protected $generatedTestFiles = FALSE;

  /**
   * The number of redirects followed during the handling of a request.
   */
  protected $redirect_count;

  /**
   * Constructor for DrupalWebTestCase.
   */
  function __construct($test_id = NULL) {
    parent::__construct($test_id);
    $this->skipClasses[__CLASS__] = TRUE;
  }

  /**
   * Get a node from the database based on its title.
   *
   * @param $title
   *   A node title, usually generated by $this->randomName().
   * @param $reset
   *   (optional) Whether to reset the internal node_load() cache.
   *
   * @return
   *   A node object matching $title.
   */
  function drupalGetNodeByTitle($title, $reset = FALSE) {
    $nodes = node_load_multiple(array(), array(
      'title' => $title,
    ), $reset);

    // Load the first node returned from the database.
    $returned_node = reset($nodes);
    return $returned_node;
  }

  /**
   * Creates a node based on default settings.
   *
   * @param $settings
   *   An associative array of settings to change from the defaults, keys are
   *   node properties, for example 'title' => 'Hello, world!'.
   * @return
   *   Created node object.
   */
  protected function drupalCreateNode($settings = array()) {

    // Populate defaults array.
    $settings += array(
      'title' => $this
        ->randomName(8),
      'comment' => 2,
      'changed' => REQUEST_TIME,
      'moderate' => 0,
      'promote' => 0,
      'revision' => 1,
      'log' => '',
      'status' => 1,
      'sticky' => 0,
      'type' => 'page',
      'revisions' => NULL,
      'language' => LANGUAGE_NONE,
    );

    // Add the body after the language is defined so that it may be set
    // properly.
    $settings += array(
      'body' => array(
        $settings['language'] => array(
          array(),
        ),
      ),
    );

    // Use the original node's created time for existing nodes.
    if (isset($settings['created']) && !isset($settings['date'])) {
      $settings['date'] = format_date($settings['created'], 'custom', 'Y-m-d H:i:s O');
    }

    // If the node's user uid is not specified manually, use the currently
    // logged in user if available, or else the user running the test.
    if (!isset($settings['uid'])) {
      if ($this->loggedInUser) {
        $settings['uid'] = $this->loggedInUser->uid;
      }
      else {
        global $user;
        $settings['uid'] = $user->uid;
      }
    }

    // Merge body field value and format separately.
    $body = array(
      'value' => $this
        ->randomName(32),
      'format' => filter_default_format(),
    );
    $settings['body'][$settings['language']][0] += $body;
    $node = (object) $settings;
    node_save($node);

    // Small hack to link revisions to our test user.
    db_update('node_revision')
      ->fields(array(
      'uid' => $node->uid,
    ))
      ->condition('vid', $node->vid)
      ->execute();
    return $node;
  }

  /**
   * Creates a custom content type based on default settings.
   *
   * @param $settings
   *   An array of settings to change from the defaults.
   *   Example: 'type' => 'foo'.
   * @return
   *   Created content type.
   */
  protected function drupalCreateContentType($settings = array()) {

    // Find a non-existent random type name.
    do {
      $name = strtolower($this
        ->randomName(8));
    } while (node_type_get_type($name));

    // Populate defaults array.
    $defaults = array(
      'type' => $name,
      'name' => $name,
      'base' => 'node_content',
      'description' => '',
      'help' => '',
      'title_label' => 'Title',
      'has_title' => 1,
    );

    // Imposed values for a custom type.
    $forced = array(
      'orig_type' => '',
      'old_type' => '',
      'module' => 'node',
      'custom' => 1,
      'modified' => 1,
      'locked' => 0,
    );
    $type = $forced + $settings + $defaults;
    $type = (object) $type;
    $saved_type = node_type_save($type);
    node_types_rebuild();
    menu_rebuild();
    node_add_body_field($type);
    $this
      ->assertEqual($saved_type, SAVED_NEW, t('Created content type %type.', array(
      '%type' => $type->type,
    )));

    // Reset permissions so that permissions for this content type are available.
    $this
      ->checkPermissions(array(), TRUE);
    return $type;
  }

  /**
   * Get a list files that can be used in tests.
   *
   * @param $type
   *   File type, possible values: 'binary', 'html', 'image', 'javascript', 'php', 'sql', 'text'.
   * @param $size
   *   File size in bytes to match. Please check the tests/files folder.
   * @return
   *   List of files that match filter.
   */
  protected function drupalGetTestFiles($type, $size = NULL) {
    if (empty($this->generatedTestFiles)) {

      // Generate binary test files.
      $lines = array(
        64,
        1024,
      );
      $count = 0;
      foreach ($lines as $line) {
        simpletest_generate_file('binary-' . $count++, 64, $line, 'binary');
      }

      // Generate text test files.
      $lines = array(
        16,
        256,
        1024,
        2048,
        20480,
      );
      $count = 0;
      foreach ($lines as $line) {
        simpletest_generate_file('text-' . $count++, 64, $line, 'text');
      }

      // Copy other test files from simpletest.
      $original = drupal_get_path('module', 'simpletest') . '/files';
      $files = file_scan_directory($original, '/(html|image|javascript|php|sql)-.*/');
      foreach ($files as $file) {
        file_unmanaged_copy($file->uri, variable_get('file_public_path', conf_path() . '/files'));
      }
      $this->generatedTestFiles = TRUE;
    }
    $files = array();

    // Make sure type is valid.
    if (in_array($type, array(
      'binary',
      'html',
      'image',
      'javascript',
      'php',
      'sql',
      'text',
    ))) {
      $files = file_scan_directory('public://', '/' . $type . '\\-.*/');

      // If size is set then remove any files that are not of that size.
      if ($size !== NULL) {
        foreach ($files as $file) {
          $stats = stat($file->uri);
          if ($stats['size'] != $size) {
            unset($files[$file->uri]);
          }
        }
      }
    }
    usort($files, array(
      $this,
      'drupalCompareFiles',
    ));
    return $files;
  }

  /**
   * Compare two files based on size and file name.
   */
  protected function drupalCompareFiles($file1, $file2) {
    $compare_size = filesize($file1->uri) - filesize($file2->uri);
    if ($compare_size) {

      // Sort by file size.
      return $compare_size;
    }
    else {

      // The files were the same size, so sort alphabetically.
      return strnatcmp($file1->name, $file2->name);
    }
  }

  /**
   * Create a user with a given set of permissions.
   *
   * @param array $permissions
   *   Array of permission names to assign to user. Note that the user always
   *   has the default permissions derived from the "authenticated users" role.
   *
   * @return object|false
   *   A fully loaded user object with pass_raw property, or FALSE if account
   *   creation fails.
   */
  protected function drupalCreateUser(array $permissions = array()) {

    // Create a role with the given permission set, if any.
    $rid = FALSE;
    if ($permissions) {
      $rid = $this
        ->drupalCreateRole($permissions);
      if (!$rid) {
        return FALSE;
      }
    }

    // Create a user assigned to that role.
    $edit = array();
    $edit['name'] = $this
      ->randomName();
    $edit['mail'] = $edit['name'] . '@example.com';
    $edit['pass'] = user_password();
    $edit['status'] = 1;
    if ($rid) {
      $edit['roles'] = array(
        $rid => $rid,
      );
    }
    $account = user_save(drupal_anonymous_user(), $edit);
    $this
      ->assertTrue(!empty($account->uid), t('User created with name %name and pass %pass', array(
      '%name' => $edit['name'],
      '%pass' => $edit['pass'],
    )), t('User login'));
    if (empty($account->uid)) {
      return FALSE;
    }

    // Add the raw password so that we can log in as this user.
    $account->pass_raw = $edit['pass'];
    return $account;
  }

  /**
   * Creates a role with specified permissions.
   *
   * @param $permissions
   *   Array of permission names to assign to role.
   * @param $name
   *   (optional) String for the name of the role.  Defaults to a random string.
   * @return
   *   Role ID of newly created role, or FALSE if role creation failed.
   */
  protected function drupalCreateRole(array $permissions, $name = NULL) {

    // Generate random name if it was not passed.
    if (!$name) {
      $name = $this
        ->randomName();
    }

    // Check the all the permissions strings are valid.
    if (!$this
      ->checkPermissions($permissions)) {
      return FALSE;
    }

    // Create new role.
    $role = new stdClass();
    $role->name = $name;
    user_role_save($role);
    user_role_grant_permissions($role->rid, $permissions);
    $this
      ->assertTrue(isset($role->rid), t('Created role of name: @name, id: @rid', array(
      '@name' => $name,
      '@rid' => isset($role->rid) ? $role->rid : t('-n/a-'),
    )), t('Role'));
    if ($role && !empty($role->rid)) {
      $count = db_query('SELECT COUNT(*) FROM {role_permission} WHERE rid = :rid', array(
        ':rid' => $role->rid,
      ))
        ->fetchField();
      $this
        ->assertTrue($count == count($permissions), t('Created permissions: @perms', array(
        '@perms' => implode(', ', $permissions),
      )), t('Role'));
      return $role->rid;
    }
    else {
      return FALSE;
    }
  }

  /**
   * Check to make sure that the array of permissions are valid.
   *
   * @param $permissions
   *   Permissions to check.
   * @param $reset
   *   Reset cached available permissions.
   * @return
   *   TRUE or FALSE depending on whether the permissions are valid.
   */
  protected function checkPermissions(array $permissions, $reset = FALSE) {
    $available =& drupal_static(__FUNCTION__);
    if (!isset($available) || $reset) {
      $available = array_keys(module_invoke_all('permission'));
    }
    $valid = TRUE;
    foreach ($permissions as $permission) {
      if (!in_array($permission, $available)) {
        $this
          ->fail(t('Invalid permission %permission.', array(
          '%permission' => $permission,
        )), t('Role'));
        $valid = FALSE;
      }
    }
    return $valid;
  }

  /**
   * Log in a user with the internal browser.
   *
   * If a user is already logged in, then the current user is logged out before
   * logging in the specified user.
   *
   * Please note that neither the global $user nor the passed-in user object is
   * populated with data of the logged in user. If you need full access to the
   * user object after logging in, it must be updated manually. If you also need
   * access to the plain-text password of the user (set by drupalCreateUser()),
   * e.g. to log in the same user again, then it must be re-assigned manually.
   * For example:
   * @code
   *   // Create a user.
   *   $account = $this->drupalCreateUser(array());
   *   $this->drupalLogin($account);
   *   // Load real user object.
   *   $pass_raw = $account->pass_raw;
   *   $account = user_load($account->uid);
   *   $account->pass_raw = $pass_raw;
   * @endcode
   *
   * @param $account
   *   User object representing the user to log in.
   *
   * @see drupalCreateUser()
   */
  protected function drupalLogin(stdClass $account) {
    if ($this->loggedInUser) {
      $this
        ->drupalLogout();
    }
    $edit = array(
      'name' => $account->name,
      'pass' => $account->pass_raw,
    );
    $this
      ->drupalPost('user', $edit, t('Log in'));

    // If a "log out" link appears on the page, it is almost certainly because
    // the login was successful.
    $pass = $this
      ->assertLink(t('Log out'), 0, t('User %name successfully logged in.', array(
      '%name' => $account->name,
    )), t('User login'));
    if ($pass) {
      $this->loggedInUser = $account;
    }
  }

  /**
   * Generate a token for the currently logged in user.
   */
  protected function drupalGetToken($value = '') {
    $private_key = drupal_get_private_key();
    return drupal_hmac_base64($value, $this->session_id . $private_key);
  }

  /*
   * Logs a user out of the internal browser, then check the login page to confirm logout.
   */
  protected function drupalLogout() {

    // Make a request to the logout page, and redirect to the user page, the
    // idea being if you were properly logged out you should be seeing a login
    // screen.
    $this
      ->drupalGet('user/logout');
    $this
      ->drupalGet('user');
    $pass = $this
      ->assertField('name', t('Username field found.'), t('Logout'));
    $pass = $pass && $this
      ->assertField('pass', t('Password field found.'), t('Logout'));
    if ($pass) {
      $this->loggedInUser = FALSE;
    }
  }

  /**
   * Generates a database prefix for running tests.
   *
   * The generated database table prefix is used for the Drupal installation
   * being performed for the test. It is also used as user agent HTTP header
   * value by the cURL-based browser of DrupalWebTestCase, which is sent
   * to the Drupal installation of the test. During early Drupal bootstrap, the
   * user agent HTTP header is parsed, and if it matches, all database queries
   * use the database table prefix that has been generated here.
   *
   * @see DrupalWebTestCase::curlInitialize()
   * @see drupal_valid_test_ua()
   * @see DrupalWebTestCase::setUp()
   */
  protected function prepareDatabasePrefix() {
    $this->databasePrefix = 'simpletest' . mt_rand(1000, 1000000);

    // As soon as the database prefix is set, the test might start to execute.
    // All assertions as well as the SimpleTest batch operations are associated
    // with the testId, so the database prefix has to be associated with it.
    db_update('simpletest_test_id')
      ->fields(array(
      'last_prefix' => $this->databasePrefix,
    ))
      ->condition('test_id', $this->testId)
      ->execute();
  }

  /**
   * Changes the database connection to the prefixed one.
   *
   * @see DrupalWebTestCase::setUp()
   */
  protected function changeDatabasePrefix() {
    if (empty($this->databasePrefix)) {
      $this
        ->prepareDatabasePrefix();

      // If $this->prepareDatabasePrefix() failed to work, return without
      // setting $this->setupDatabasePrefix to TRUE, so setUp() methods will
      // know to bail out.
      if (empty($this->databasePrefix)) {
        return;
      }
    }

    // Clone the current connection and replace the current prefix.
    $connection_info = Database::getConnectionInfo('default');
    Database::renameConnection('default', 'simpletest_original_default');
    foreach ($connection_info as $target => $value) {
      $connection_info[$target]['prefix'] = array(
        'default' => $value['prefix']['default'] . $this->databasePrefix,
      );
    }
    Database::addConnectionInfo('default', 'default', $connection_info['default']);

    // Indicate the database prefix was set up correctly.
    $this->setupDatabasePrefix = TRUE;
  }

  /**
   * Prepares the current environment for running the test.
   *
   * Backups various current environment variables and resets them, so they do
   * not interfere with the Drupal site installation in which tests are executed
   * and can be restored in tearDown().
   *
   * Also sets up new resources for the testing environment, such as the public
   * filesystem and configuration directories.
   *
   * @see DrupalWebTestCase::setUp()
   * @see DrupalWebTestCase::tearDown()
   */
  protected function prepareEnvironment() {
    global $user, $language, $language_url, $conf;

    // Store necessary current values before switching to prefixed database.
    $this->originalLanguage = $language;
    $this->originalLanguageUrl = $language_url;
    $this->originalLanguageDefault = variable_get('language_default');
    $this->originalFileDirectory = variable_get('file_public_path', conf_path() . '/files');
    $this->verboseDirectoryUrl = file_create_url($this->originalFileDirectory . '/simpletest/verbose');
    $this->originalProfile = drupal_get_profile();
    $this->originalCleanUrl = variable_get('clean_url', 0);
    $this->originalUser = $user;

    // Set to English to prevent exceptions from utf8_truncate() from t()
    // during install if the current language is not 'en'.
    // The following array/object conversion is copied from language_default().
    $language_url = $language = (object) array(
      'language' => 'en',
      'name' => 'English',
      'native' => 'English',
      'direction' => 0,
      'enabled' => 1,
      'plurals' => 0,
      'formula' => '',
      'domain' => '',
      'prefix' => '',
      'weight' => 0,
      'javascript' => '',
    );

    // Save and clean the shutdown callbacks array because it is static cached
    // and will be changed by the test run. Otherwise it will contain callbacks
    // from both environments and the testing environment will try to call the
    // handlers defined by the original one.
    $callbacks =& drupal_register_shutdown_function();
    $this->originalShutdownCallbacks = $callbacks;
    $callbacks = array();

    // Create test directory ahead of installation so fatal errors and debug
    // information can be logged during installation process.
    // Use temporary files directory with the same prefix as the database.
    $this->public_files_directory = $this->originalFileDirectory . '/simpletest/' . substr($this->databasePrefix, 10);
    $this->private_files_directory = $this->public_files_directory . '/private';
    $this->temp_files_directory = $this->private_files_directory . '/temp';

    // Create the directories
    file_prepare_directory($this->public_files_directory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
    file_prepare_directory($this->private_files_directory, FILE_CREATE_DIRECTORY);
    file_prepare_directory($this->temp_files_directory, FILE_CREATE_DIRECTORY);
    $this->generatedTestFiles = FALSE;

    // Log fatal errors.
    ini_set('log_errors', 1);
    ini_set('error_log', $this->public_files_directory . '/error.log');

    // Set the test information for use in other parts of Drupal.
    $test_info =& $GLOBALS['drupal_test_info'];
    $test_info['test_run_id'] = $this->databasePrefix;
    $test_info['in_child_site'] = FALSE;

    // Indicate the environment was set up correctly.
    $this->setupEnvironment = TRUE;
  }

  /**
   * Sets up a Drupal site for running functional and integration tests.
   *
   * Generates a random database prefix and installs Drupal with the specified
   * installation profile in DrupalWebTestCase::$profile into the
   * prefixed database. Afterwards, installs any additional modules specified by
   * the test.
   *
   * After installation all caches are flushed and several configuration values
   * are reset to the values of the parent site executing the test, since the
   * default values may be incompatible with the environment in which tests are
   * being executed.
   *
   * @param ...
   *   List of modules to enable for the duration of the test. This can be
   *   either a single array or a variable number of string arguments.
   *
   * @see DrupalWebTestCase::prepareDatabasePrefix()
   * @see DrupalWebTestCase::changeDatabasePrefix()
   * @see DrupalWebTestCase::prepareEnvironment()
   */
  protected function setUp() {
    global $user, $language, $language_url, $conf;

    // Create the database prefix for this test.
    $this
      ->prepareDatabasePrefix();

    // Prepare the environment for running tests.
    $this
      ->prepareEnvironment();
    if (!$this->setupEnvironment) {
      return FALSE;
    }

    // Reset all statics and variables to perform tests in a clean environment.
    $conf = array();
    drupal_static_reset();

    // Change the database prefix.
    // All static variables need to be reset before the database prefix is
    // changed, since DrupalCacheArray implementations attempt to
    // write back to persistent caches when they are destructed.
    $this
      ->changeDatabasePrefix();
    if (!$this->setupDatabasePrefix) {
      return FALSE;
    }

    // Preset the 'install_profile' system variable, so the first call into
    // system_rebuild_module_data() (in drupal_install_system()) will register
    // the test's profile as a module. Without this, the installation profile of
    // the parent site (executing the test) is registered, and the test
    // profile's hook_install() and other hook implementations are never invoked.
    $conf['install_profile'] = $this->profile;

    // Perform the actual Drupal installation.
    include_once DRUPAL_ROOT . '/includes/install.inc';
    drupal_install_system();
    $this
      ->preloadRegistry();

    // Set path variables.
    variable_set('file_public_path', $this->public_files_directory);
    variable_set('file_private_path', $this->private_files_directory);
    variable_set('file_temporary_path', $this->temp_files_directory);

    // Set the 'simpletest_parent_profile' variable to add the parent profile's
    // search path to the child site's search paths.
    // @see drupal_system_listing()
    // @todo This may need to be primed like 'install_profile' above.
    variable_set('simpletest_parent_profile', $this->originalProfile);

    // Include the testing profile.
    variable_set('install_profile', $this->profile);
    $profile_details = install_profile_info($this->profile, 'en');

    // Install the modules specified by the testing profile.
    module_enable($profile_details['dependencies'], FALSE);

    // Install modules needed for this test. This could have been passed in as
    // either a single array argument or a variable number of string arguments.
    // @todo Remove this compatibility layer in Drupal 8, and only accept
    // $modules as a single array argument.
    $modules = func_get_args();
    if (isset($modules[0]) && is_array($modules[0])) {
      $modules = $modules[0];
    }
    if ($modules) {
      $success = module_enable($modules, TRUE);
      $this
        ->assertTrue($success, t('Enabled modules: %modules', array(
        '%modules' => implode(', ', $modules),
      )));
    }

    // Run the profile tasks.
    $install_profile_module_exists = db_query("SELECT 1 FROM {system} WHERE type = 'module' AND name = :name", array(
      ':name' => $this->profile,
    ))
      ->fetchField();
    if ($install_profile_module_exists) {
      module_enable(array(
        $this->profile,
      ), FALSE);
    }

    // Reset/rebuild all data structures after enabling the modules.
    $this
      ->resetAll();

    // Run cron once in that environment, as install.php does at the end of
    // the installation process.
    drupal_cron_run();

    // Ensure that the session is not written to the new environment and replace
    // the global $user session with uid 1 from the new test site.
    drupal_save_session(FALSE);

    // Login as uid 1.
    $user = user_load(1);

    // Restore necessary variables.
    variable_set('install_task', 'done');
    variable_set('clean_url', $this->originalCleanUrl);
    variable_set('site_mail', 'simpletest@example.com');
    variable_set('date_default_timezone', date_default_timezone_get());

    // Set up English language.
    unset($conf['language_default']);
    $language_url = $language = language_default();

    // Use the test mail class instead of the default mail handler class.
    variable_set('mail_system', array(
      'default-system' => 'TestingMailSystem',
    ));
    drupal_set_time_limit($this->timeLimit);
    $this->setup = TRUE;
  }

  /**
   * Preload the registry from the testing site.
   *
   * This method is called by DrupalWebTestCase::setUp(), and preloads the
   * registry from the testing site to cut down on the time it takes to
   * set up a clean environment for the current test run.
   */
  protected function preloadRegistry() {

    // Use two separate queries, each with their own connections: copy the
    // {registry} and {registry_file} tables over from the parent installation
    // to the child installation.
    $original_connection = Database::getConnection('default', 'simpletest_original_default');
    $test_connection = Database::getConnection();
    foreach (array(
      'registry',
      'registry_file',
    ) as $table) {

      // Find the records from the parent database.
      $source_query = $original_connection
        ->select($table, array(), array(
        'fetch' => PDO::FETCH_ASSOC,
      ))
        ->fields($table);
      $dest_query = $test_connection
        ->insert($table);
      $first = TRUE;
      foreach ($source_query
        ->execute() as $row) {
        if ($first) {
          $dest_query
            ->fields(array_keys($row));
          $first = FALSE;
        }

        // Insert the records into the child database.
        $dest_query
          ->values($row);
      }
      $dest_query
        ->execute();
    }
  }

  /**
   * Reset all data structures after having enabled new modules.
   *
   * This method is called by DrupalWebTestCase::setUp() after enabling
   * the requested modules. It must be called again when additional modules
   * are enabled later.
   */
  protected function resetAll() {

    // Reset all static variables.
    drupal_static_reset();

    // Reset the list of enabled modules.
    module_list(TRUE);

    // Reset cached schema for new database prefix. This must be done before
    // drupal_flush_all_caches() so rebuilds can make use of the schema of
    // modules enabled on the cURL side.
    drupal_get_schema(NULL, TRUE);

    // Perform rebuilds and flush remaining caches.
    drupal_flush_all_caches();

    // Reload global $conf array and permissions.
    $this
      ->refreshVariables();
    $this
      ->checkPermissions(array(), TRUE);
  }

  /**
   * Refresh the in-memory set of variables. Useful after a page request is made
   * that changes a variable in a different thread.
   *
   * In other words calling a settings page with $this->drupalPost() with a changed
   * value would update a variable to reflect that change, but in the thread that
   * made the call (thread running the test) the changed variable would not be
   * picked up.
   *
   * This method clears the variables cache and loads a fresh copy from the database
   * to ensure that the most up-to-date set of variables is loaded.
   */
  protected function refreshVariables() {
    global $conf;
    cache_clear_all('variables', 'cache_bootstrap');
    $conf = variable_initialize();
  }

  /**
   * Delete created files and temporary files directory, delete the tables created by setUp(),
   * and reset the database prefix.
   */
  protected function tearDown() {
    global $user, $language, $language_url;

    // In case a fatal error occurred that was not in the test process read the
    // log to pick up any fatal errors.
    simpletest_log_read($this->testId, $this->databasePrefix, get_class($this), TRUE);
    $emailCount = count(variable_get('drupal_test_email_collector', array()));
    if ($emailCount) {
      $message = format_plural($emailCount, '1 e-mail was sent during this test.', '@count e-mails were sent during this test.');
      $this
        ->pass($message, t('E-mail'));
    }

    // Delete temporary files directory.
    file_unmanaged_delete_recursive($this->originalFileDirectory . '/simpletest/' . substr($this->databasePrefix, 10));

    // Remove all prefixed tables.
    $tables = db_find_tables($this->databasePrefix . '%');
    $connection_info = Database::getConnectionInfo('default');
    $tables = db_find_tables($connection_info['default']['prefix']['default'] . '%');
    if (empty($tables)) {
      $this
        ->fail('Failed to find test tables to drop.');
    }
    $prefix_length = strlen($connection_info['default']['prefix']['default']);
    foreach ($tables as $table) {
      if (db_drop_table(substr($table, $prefix_length))) {
        unset($tables[$table]);
      }
    }
    if (!empty($tables)) {
      $this
        ->fail('Failed to drop all prefixed tables.');
    }

    // Get back to the original connection.
    Database::removeConnection('default');
    Database::renameConnection('simpletest_original_default', 'default');

    // Restore original shutdown callbacks array to prevent original
    // environment of calling handlers from test run.
    $callbacks =& drupal_register_shutdown_function();
    $callbacks = $this->originalShutdownCallbacks;

    // Return the user to the original one.
    $user = $this->originalUser;
    drupal_save_session(TRUE);

    // Ensure that internal logged in variable and cURL options are reset.
    $this->loggedInUser = FALSE;
    $this->additionalCurlOptions = array();

    // Reload module list and implementations to ensure that test module hooks
    // aren't called after tests.
    module_list(TRUE);
    module_implements('', FALSE, TRUE);

    // Reset the Field API.
    field_cache_clear();

    // Rebuild caches.
    $this
      ->refreshVariables();

    // Reset public files directory.
    $GLOBALS['conf']['file_public_path'] = $this->originalFileDirectory;

    // Reset language.
    $language = $this->originalLanguage;
    $language_url = $this->originalLanguageUrl;
    if ($this->originalLanguageDefault) {
      $GLOBALS['conf']['language_default'] = $this->originalLanguageDefault;
    }

    // Close the CURL handler and reset the cookies array so test classes
    // containing multiple tests are not polluted.
    $this
      ->curlClose();
    $this->cookies = array();
  }

  /**
   * Initializes the cURL connection.
   *
   * If the simpletest_httpauth_credentials variable is set, this function will
   * add HTTP authentication headers. This is necessary for testing sites that
   * are protected by login credentials from public access.
   * See the description of $curl_options for other options.
   */
  protected function curlInitialize() {
    global $base_url;
    if (!isset($this->curlHandle)) {
      $this->curlHandle = curl_init();

      // Some versions/configurations of cURL break on a NULL cookie jar, so
      // supply a real file.
      if (empty($this->cookieFile)) {
        $this->cookieFile = $this->public_files_directory . '/cookie.jar';
      }
      $curl_options = array(
        CURLOPT_COOKIEJAR => $this->cookieFile,
        CURLOPT_URL => $base_url,
        CURLOPT_FOLLOWLOCATION => FALSE,
        CURLOPT_RETURNTRANSFER => TRUE,
        CURLOPT_SSL_VERIFYPEER => FALSE,
        // Required to make the tests run on HTTPS.
        CURLOPT_SSL_VERIFYHOST => FALSE,
        // Required to make the tests run on HTTPS.
        CURLOPT_HEADERFUNCTION => array(
          &$this,
          'curlHeaderCallback',
        ),
        CURLOPT_USERAGENT => $this->databasePrefix,
      );
      if (isset($this->httpauth_credentials)) {
        $curl_options[CURLOPT_HTTPAUTH] = $this->httpauth_method;
        $curl_options[CURLOPT_USERPWD] = $this->httpauth_credentials;
      }

      // curl_setopt_array() returns FALSE if any of the specified options
      // cannot be set, and stops processing any further options.
      $result = curl_setopt_array($this->curlHandle, $this->additionalCurlOptions + $curl_options);
      if (!$result) {
        throw new Exception('One or more cURL options could not be set.');
      }

      // By default, the child session name should be the same as the parent.
      $this->session_name = session_name();
    }

    // We set the user agent header on each request so as to use the current
    // time and a new uniqid.
    if (preg_match('/simpletest\\d+/', $this->databasePrefix, $matches)) {
      curl_setopt($this->curlHandle, CURLOPT_USERAGENT, drupal_generate_test_ua($matches[0]));
    }
  }

  /**
   * Initializes and executes a cURL request.
   *
   * @param $curl_options
   *   An associative array of cURL options to set, where the keys are constants
   *   defined by the cURL library. For a list of valid options, see
   *   http://www.php.net/manual/function.curl-setopt.php
   * @param $redirect
   *   FALSE if this is an initial request, TRUE if this request is the result
   *   of a redirect.
   *
   * @return
   *   The content returned from the call to curl_exec().
   *
   * @see curlInitialize()
   */
  protected function curlExec($curl_options, $redirect = FALSE) {
    $this
      ->curlInitialize();
    if (!empty($curl_options[CURLOPT_URL])) {

      // Forward XDebug activation if present.
      if (isset($_COOKIE['XDEBUG_SESSION'])) {
        $options = drupal_parse_url($curl_options[CURLOPT_URL]);
        $options += array(
          'query' => array(),
        );
        $options['query'] += array(
          'XDEBUG_SESSION_START' => $_COOKIE['XDEBUG_SESSION'],
        );
        $curl_options[CURLOPT_URL] = url($options['path'], $options);
      }

      // cURL incorrectly handles URLs with a fragment by including the
      // fragment in the request to the server, causing some web servers
      // to reject the request citing "400 - Bad Request". To prevent
      // this, we strip the fragment from the request.
      // TODO: Remove this for Drupal 8, since fixed in curl 7.20.0.
      if (strpos($curl_options[CURLOPT_URL], '#')) {
        $original_url = $curl_options[CURLOPT_URL];
        $curl_options[CURLOPT_URL] = strtok($curl_options[CURLOPT_URL], '#');
      }
    }
    $url = empty($curl_options[CURLOPT_URL]) ? curl_getinfo($this->curlHandle, CURLINFO_EFFECTIVE_URL) : $curl_options[CURLOPT_URL];
    if (!empty($curl_options[CURLOPT_POST])) {

      // This is a fix for the Curl library to prevent Expect: 100-continue
      // headers in POST requests, that may cause unexpected HTTP response
      // codes from some webservers (like lighttpd that returns a 417 error
      // code). It is done by setting an empty "Expect" header field that is
      // not overwritten by Curl.
      $curl_options[CURLOPT_HTTPHEADER][] = 'Expect:';
    }
    curl_setopt_array($this->curlHandle, $this->additionalCurlOptions + $curl_options);
    if (!$redirect) {

      // Reset headers, the session ID and the redirect counter.
      $this->session_id = NULL;
      $this->headers = array();
      $this->redirect_count = 0;
    }
    $content = curl_exec($this->curlHandle);
    $status = curl_getinfo($this->curlHandle, CURLINFO_HTTP_CODE);

    // cURL incorrectly handles URLs with fragments, so instead of
    // letting cURL handle redirects we take of them ourselves to
    // to prevent fragments being sent to the web server as part
    // of the request.
    // TODO: Remove this for Drupal 8, since fixed in curl 7.20.0.
    if (in_array($status, array(
      300,
      301,
      302,
      303,
      305,
      307,
    )) && $this->redirect_count < variable_get('simpletest_maximum_redirects', 5)) {
      if ($this
        ->drupalGetHeader('location')) {
        $this->redirect_count++;
        $curl_options = array();
        $curl_options[CURLOPT_URL] = $this
          ->drupalGetHeader('location');
        $curl_options[CURLOPT_HTTPGET] = TRUE;
        return $this
          ->curlExec($curl_options, TRUE);
      }
    }
    $this
      ->drupalSetContent($content, isset($original_url) ? $original_url : curl_getinfo($this->curlHandle, CURLINFO_EFFECTIVE_URL));
    $message_vars = array(
      '!method' => !empty($curl_options[CURLOPT_NOBODY]) ? 'HEAD' : (empty($curl_options[CURLOPT_POSTFIELDS]) ? 'GET' : 'POST'),
      '@url' => isset($original_url) ? $original_url : $url,
      '@status' => $status,
      '!length' => format_size(strlen($this
        ->drupalGetContent())),
    );
    $message = t('!method @url returned @status (!length).', $message_vars);
    $this
      ->assertTrue($this
      ->drupalGetContent() !== FALSE, $message, t('Browser'));
    return $this
      ->drupalGetContent();
  }

  /**
   * Reads headers and registers errors received from the tested site.
   *
   * @see _drupal_log_error().
   *
   * @param $curlHandler
   *   The cURL handler.
   * @param $header
   *   An header.
   */
  protected function curlHeaderCallback($curlHandler, $header) {

    // Header fields can be extended over multiple lines by preceding each
    // extra line with at least one SP or HT. They should be joined on receive.
    // Details are in RFC2616 section 4.
    if ($header[0] == ' ' || $header[0] == "\t") {

      // Normalize whitespace between chucks.
      $this->headers[] = array_pop($this->headers) . ' ' . trim($header);
    }
    else {
      $this->headers[] = $header;
    }

    // Errors are being sent via X-Drupal-Assertion-* headers,
    // generated by _drupal_log_error() in the exact form required
    // by DrupalWebTestCase::error().
    if (preg_match('/^X-Drupal-Assertion-[0-9]+: (.*)$/', $header, $matches)) {

      // Call DrupalWebTestCase::error() with the parameters from the header.
      call_user_func_array(array(
        &$this,
        'error',
      ), unserialize(urldecode($matches[1])));
    }

    // Save cookies.
    if (preg_match('/^Set-Cookie: ([^=]+)=(.+)/', $header, $matches)) {
      $name = $matches[1];
      $parts = array_map('trim', explode(';', $matches[2]));
      $value = array_shift($parts);
      $this->cookies[$name] = array(
        'value' => $value,
        'secure' => in_array('secure', $parts),
      );
      if ($name == $this->session_name) {
        if ($value != 'deleted') {
          $this->session_id = $value;
        }
        else {
          $this->session_id = NULL;
        }
      }
    }

    // This is required by cURL.
    return strlen($header);
  }

  /**
   * Close the cURL handler and unset the handler.
   */
  protected function curlClose() {
    if (isset($this->curlHandle)) {
      curl_close($this->curlHandle);
      unset($this->curlHandle);
    }
  }

  /**
   * Parse content returned from curlExec using DOM and SimpleXML.
   *
   * @return
   *   A SimpleXMLElement or FALSE on failure.
   */
  protected function parse() {
    if (!$this->elements) {

      // DOM can load HTML soup. But, HTML soup can throw warnings, suppress
      // them.
      $htmlDom = new DOMDocument();
      @$htmlDom
        ->loadHTML($this
        ->drupalGetContent());
      if ($htmlDom) {
        $this
          ->pass(t('Valid HTML found on "@path"', array(
          '@path' => $this
            ->getUrl(),
        )), t('Browser'));

        // It's much easier to work with simplexml than DOM, luckily enough
        // we can just simply import our DOM tree.
        $this->elements = simplexml_import_dom($htmlDom);
      }
    }
    if (!$this->elements) {
      $this
        ->fail(t('Parsed page successfully.'), t('Browser'));
    }
    return $this->elements;
  }

  /**
   * Retrieves a Drupal path or an absolute path.
   *
   * @param $path
   *   Drupal path or URL to load into internal browser
   * @param $options
   *   Options to be forwarded to url().
   * @param $headers
   *   An array containing additional HTTP request headers, each formatted as
   *   "name: value".
   * @return
   *   The retrieved HTML string, also available as $this->drupalGetContent()
   */
  protected function drupalGet($path, array $options = array(), array $headers = array()) {
    $options['absolute'] = TRUE;

    // We re-using a CURL connection here. If that connection still has certain
    // options set, it might change the GET into a POST. Make sure we clear out
    // previous options.
    $out = $this
      ->curlExec(array(
      CURLOPT_HTTPGET => TRUE,
      CURLOPT_URL => url($path, $options),
      CURLOPT_NOBODY => FALSE,
      CURLOPT_HTTPHEADER => $headers,
    ));
    $this
      ->refreshVariables();

    // Ensure that any changes to variables in the other thread are picked up.
    // Replace original page output with new output from redirected page(s).
    if ($new = $this
      ->checkForMetaRefresh()) {
      $out = $new;
    }
    $this
      ->verbose('GET request to: ' . $path . '<hr />Ending URL: ' . $this
      ->getUrl() . '<hr />' . $out);
    return $out;
  }

  /**
   * Retrieve a Drupal path or an absolute path and JSON decode the result.
   */
  protected function drupalGetAJAX($path, array $options = array(), array $headers = array()) {
    return drupal_json_decode($this
      ->drupalGet($path, $options, $headers));
  }

  /**
   * Execute a POST request on a Drupal page.
   * It will be done as usual POST request with SimpleBrowser.
   *
   * @param $path
   *   Location of the post form. Either a Drupal path or an absolute path or
   *   NULL to post to the current page. For multi-stage forms you can set the
   *   path to NULL and have it post to the last received page. Example:
   *
   *   @code
   *   // First step in form.
   *   $edit = array(...);
   *   $this->drupalPost('some_url', $edit, t('Save'));
   *
   *   // Second step in form.
   *   $edit = array(...);
   *   $this->drupalPost(NULL, $edit, t('Save'));
   *   @endcode
   * @param  $edit
   *   Field data in an associative array. Changes the current input fields
   *   (where possible) to the values indicated. A checkbox can be set to
   *   TRUE to be checked and FALSE to be unchecked. Note that when a form
   *   contains file upload fields, other fields cannot start with the '@'
   *   character.
   *
   *   Multiple select fields can be set using name[] and setting each of the
   *   possible values. Example:
   *   @code
   *   $edit = array();
   *   $edit['name[]'] = array('value1', 'value2');
   *   @endcode
   * @param $submit
   *   Value of the submit button whose click is to be emulated. For example,
   *   t('Save'). The processing of the request depends on this value. For
   *   example, a form may have one button with the value t('Save') and another
   *   button with the value t('Delete'), and execute different code depending
   *   on which one is clicked.
   *
   *   This function can also be called to emulate an Ajax submission. In this
   *   case, this value needs to be an array with the following keys:
   *   - path: A path to submit the form values to for Ajax-specific processing,
   *     which is likely different than the $path parameter used for retrieving
   *     the initial form. Defaults to 'system/ajax'.
   *   - triggering_element: If the value for the 'path' key is 'system/ajax' or
   *     another generic Ajax processing path, this needs to be set to the name
   *     of the element. If the name doesn't identify the element uniquely, then
   *     this should instead be an array with a single key/value pair,
   *     corresponding to the element name and value. The callback for the
   *     generic Ajax processing path uses this to find the #ajax information
   *     for the element, including which specific callback to use for
   *     processing the request.
   *
   *   This can also be set to NULL in order to emulate an Internet Explorer
   *   submission of a form with a single text field, and pressing ENTER in that
   *   textfield: under these conditions, no button information is added to the
   *   POST data.
   * @param $options
   *   Options to be forwarded to url().
   * @param $headers
   *   An array containing additional HTTP request headers, each formatted as
   *   "name: value".
   * @param $form_html_id
   *   (optional) HTML ID of the form to be submitted. On some pages
   *   there are many identical forms, so just using the value of the submit
   *   button is not enough. For example: 'trigger-node-presave-assign-form'.
   *   Note that this is not the Drupal $form_id, but rather the HTML ID of the
   *   form, which is typically the same thing but with hyphens replacing the
   *   underscores.
   * @param $extra_post
   *   (optional) A string of additional data to append to the POST submission.
   *   This can be used to add POST data for which there are no HTML fields, as
   *   is done by drupalPostAJAX(). This string is literally appended to the
   *   POST data, so it must already be urlencoded and contain a leading "&"
   *   (e.g., "&extra_var1=hello+world&extra_var2=you%26me").
   */
  protected function drupalPost($path, $edit, $submit, array $options = array(), array $headers = array(), $form_html_id = NULL, $extra_post = NULL) {
    $submit_matches = FALSE;
    $ajax = is_array($submit);
    if (isset($path)) {
      $this
        ->drupalGet($path, $options);
    }
    if ($this
      ->parse()) {
      $edit_save = $edit;

      // Let's iterate over all the forms.
      $xpath = "//form";
      if (!empty($form_html_id)) {
        $xpath .= "[@id='" . $form_html_id . "']";
      }
      $forms = $this
        ->xpath($xpath);
      foreach ($forms as $form) {

        // We try to set the fields of this form as specified in $edit.
        $edit = $edit_save;
        $post = array();
        $upload = array();
        $submit_matches = $this
          ->handleForm($post, $edit, $upload, $ajax ? NULL : $submit, $form);
        $action = isset($form['action']) ? $this
          ->getAbsoluteUrl((string) $form['action']) : $this
          ->getUrl();
        if ($ajax) {
          $action = $this
            ->getAbsoluteUrl(!empty($submit['path']) ? $submit['path'] : 'system/ajax');

          // Ajax callbacks verify the triggering element if necessary, so while
          // we may eventually want extra code that verifies it in the
          // handleForm() function, it's not currently a requirement.
          $submit_matches = TRUE;
        }

        // We post only if we managed to handle every field in edit and the
        // submit button matches.
        if (!$edit && ($submit_matches || !isset($submit))) {
          $post_array = $post;
          if ($upload) {

            // TODO: cURL handles file uploads for us, but the implementation
            // is broken. This is a less than elegant workaround. Alternatives
            // are being explored at #253506.
            foreach ($upload as $key => $file) {
              $file = drupal_realpath($file);
              if ($file && is_file($file)) {

                // Use the new CurlFile class for file uploads when using PHP
                // 5.5 or higher.
                if (class_exists('CurlFile')) {
                  $post[$key] = curl_file_create($file);
                }
                else {
                  $post[$key] = '@' . $file;
                }
              }
            }
          }
          else {
            foreach ($post as $key => $value) {

              // Encode according to application/x-www-form-urlencoded
              // Both names and values needs to be urlencoded, according to
              // http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4.1
              $post[$key] = urlencode($key) . '=' . urlencode($value);
            }
            $post = implode('&', $post) . $extra_post;
          }
          $out = $this
            ->curlExec(array(
            CURLOPT_URL => $action,
            CURLOPT_POST => TRUE,
            CURLOPT_POSTFIELDS => $post,
            CURLOPT_HTTPHEADER => $headers,
          ));

          // Ensure that any changes to variables in the other thread are picked up.
          $this
            ->refreshVariables();

          // Replace original page output with new output from redirected page(s).
          if ($new = $this
            ->checkForMetaRefresh()) {
            $out = $new;
          }
          $this
            ->verbose('POST request to: ' . $path . '<hr />Ending URL: ' . $this
            ->getUrl() . '<hr />Fields: ' . highlight_string('<?php ' . var_export($post_array, TRUE), TRUE) . '<hr />' . $out);
          return $out;
        }
      }

      // We have not found a form which contained all fields of $edit.
      foreach ($edit as $name => $value) {
        $this
          ->fail(t('Failed to set field @name to @value', array(
          '@name' => $name,
          '@value' => $value,
        )));
      }
      if (!$ajax && isset($submit)) {
        $this
          ->assertTrue($submit_matches, t('Found the @submit button', array(
          '@submit' => $submit,
        )));
      }
      $this
        ->fail(t('Found the requested form fields at @path', array(
        '@path' => $path,
      )));
    }
  }

  /**
   * Execute an Ajax submission.
   *
   * This executes a POST as ajax.js does. It uses the returned JSON data, an
   * array of commands, to update $this->content using equivalent DOM
   * manipulation as is used by ajax.js. It also returns the array of commands.
   *
   * @param $path
   *   Location of the form containing the Ajax enabled element to test. Can be
   *   either a Drupal path or an absolute path or NULL to use the current page.
   * @param $edit
   *   Field data in an associative array. Changes the current input fields
   *   (where possible) to the values indicated.
   * @param $triggering_element
   *   The name of the form element that is responsible for triggering the Ajax
   *   functionality to test. May be a string or, if the triggering element is
   *   a button, an associative array where the key is the name of the button
   *   and the value is the button label. i.e.) array('op' => t('Refresh')).
   * @param $ajax_path
   *   (optional) Override the path set by the Ajax settings of the triggering
   *   element. In the absence of both the triggering element's Ajax path and
   *   $ajax_path 'system/ajax' will be used.
   * @param $options
   *   (optional) Options to be forwarded to url().
   * @param $headers
   *   (optional) An array containing additional HTTP request headers, each
   *   formatted as "name: value". Forwarded to drupalPost().
   * @param $form_html_id
   *   (optional) HTML ID of the form to be submitted, use when there is more
   *   than one identical form on the same page and the value of the triggering
   *   element is not enough to identify the form. Note this is not the Drupal
   *   ID of the form but rather the HTML ID of the form.
   * @param $ajax_settings
   *   (optional) An array of Ajax settings which if specified will be used in
   *   place of the Ajax settings of the triggering element.
   *
   * @return
   *   An array of Ajax commands.
   *
   * @see drupalPost()
   * @see ajax.js
   */
  protected function drupalPostAJAX($path, $edit, $triggering_element, $ajax_path = NULL, array $options = array(), array $headers = array(), $form_html_id = NULL, $ajax_settings = NULL) {

    // Get the content of the initial page prior to calling drupalPost(), since
    // drupalPost() replaces $this->content.
    if (isset($path)) {
      $this
        ->drupalGet($path, $options);
    }
    $content = $this->content;
    $drupal_settings = $this->drupalSettings;

    // Get the Ajax settings bound to the triggering element.
    if (!isset($ajax_settings)) {
      if (is_array($triggering_element)) {
        $xpath = '//*[@name="' . key($triggering_element) . '" and @value="' . current($triggering_element) . '"]';
      }
      else {
        $xpath = '//*[@name="' . $triggering_element . '"]';
      }
      if (isset($form_html_id)) {
        $xpath = '//form[@id="' . $form_html_id . '"]' . $xpath;
      }
      $element = $this
        ->xpath($xpath);
      $element_id = (string) $element[0]['id'];
      $ajax_settings = $drupal_settings['ajax'][$element_id];
    }

    // Add extra information to the POST data as ajax.js does.
    $extra_post = '';
    if (isset($ajax_settings['submit'])) {
      foreach ($ajax_settings['submit'] as $key => $value) {
        $extra_post .= '&' . urlencode($key) . '=' . urlencode($value);
      }
    }
    foreach ($this
      ->xpath('//*[@id]') as $element) {
      $id = (string) $element['id'];
      $extra_post .= '&' . urlencode('ajax_html_ids[]') . '=' . urlencode($id);
    }
    if (isset($drupal_settings['ajaxPageState'])) {
      $extra_post .= '&' . urlencode('ajax_page_state[theme]') . '=' . urlencode($drupal_settings['ajaxPageState']['theme']);
      $extra_post .= '&' . urlencode('ajax_page_state[theme_token]') . '=' . urlencode($drupal_settings['ajaxPageState']['theme_token']);
      foreach ($drupal_settings['ajaxPageState']['css'] as $key => $value) {
        $extra_post .= '&' . urlencode("ajax_page_state[css][{$key}]") . '=1';
      }
      foreach ($drupal_settings['ajaxPageState']['js'] as $key => $value) {
        $extra_post .= '&' . urlencode("ajax_page_state[js][{$key}]") . '=1';
      }
    }

    // Unless a particular path is specified, use the one specified by the
    // Ajax settings, or else 'system/ajax'.
    if (!isset($ajax_path)) {
      $ajax_path = isset($ajax_settings['url']) ? $ajax_settings['url'] : 'system/ajax';
    }

    // Submit the POST request.
    $return = drupal_json_decode($this
      ->drupalPost(NULL, $edit, array(
      'path' => $ajax_path,
      'triggering_element' => $triggering_element,
    ), $options, $headers, $form_html_id, $extra_post));
    $this
      ->assertIdentical($this
      ->drupalGetHeader('X-Drupal-Ajax-Token'), '1', 'Ajax response header found.');

    // Change the page content by applying the returned commands.
    if (!empty($ajax_settings) && !empty($return)) {

      // ajax.js applies some defaults to the settings object, so do the same
      // for what's used by this function.
      $ajax_settings += array(
        'method' => 'replaceWith',
      );

      // DOM can load HTML soup. But, HTML soup can throw warnings, suppress
      // them.
      $dom = new DOMDocument();
      @$dom
        ->loadHTML($content);

      // XPath allows for finding wrapper nodes better than DOM does.
      $xpath = new DOMXPath($dom);
      foreach ($return as $command) {
        switch ($command['command']) {
          case 'settings':
            $drupal_settings = drupal_array_merge_deep($drupal_settings, $command['settings']);
            break;
          case 'insert':
            $wrapperNode = NULL;

            // When a command doesn't specify a selector, use the
            // #ajax['wrapper'] which is always an HTML ID.
            if (!isset($command['selector'])) {
              $wrapperNode = $xpath
                ->query('//*[@id="' . $ajax_settings['wrapper'] . '"]')
                ->item(0);
            }
            elseif (in_array($command['selector'], array(
              'head',
              'body',
            ))) {
              $wrapperNode = $xpath
                ->query('//' . $command['selector'])
                ->item(0);
            }
            if ($wrapperNode) {

              // ajax.js adds an enclosing DIV to work around a Safari bug.
              $newDom = new DOMDocument();

              // DOM can load HTML soup. But, HTML soup can throw warnings,
              // suppress them.
              $newDom
                ->loadHTML('<div>' . $command['data'] . '</div>');

              // Suppress warnings thrown when duplicate HTML IDs are
              // encountered. This probably means we are replacing an element
              // with the same ID.
              $newNode = @$dom
                ->importNode($newDom->documentElement->firstChild->firstChild, TRUE);
              $method = isset($command['method']) ? $command['method'] : $ajax_settings['method'];

              // The "method" is a jQuery DOM manipulation function. Emulate
              // each one using PHP's DOMNode API.
              switch ($method) {
                case 'replaceWith':
                  $wrapperNode->parentNode
                    ->replaceChild($newNode, $wrapperNode);
                  break;
                case 'append':
                  $wrapperNode
                    ->appendChild($newNode);
                  break;
                case 'prepend':

                  // If no firstChild, insertBefore() falls back to
                  // appendChild().
                  $wrapperNode
                    ->insertBefore($newNode, $wrapperNode->firstChild);
                  break;
                case 'before':
                  $wrapperNode->parentNode
                    ->insertBefore($newNode, $wrapperNode);
                  break;
                case 'after':

                  // If no nextSibling, insertBefore() falls back to
                  // appendChild().
                  $wrapperNode->parentNode
                    ->insertBefore($newNode, $wrapperNode->nextSibling);
                  break;
                case 'html':
                  foreach ($wrapperNode->childNodes as $childNode) {
                    $wrapperNode
                      ->removeChild($childNode);
                  }
                  $wrapperNode
                    ->appendChild($newNode);
                  break;
              }
            }
            break;
          case 'updateBuildId':
            $buildId = $xpath
              ->query('//input[@name="form_build_id" and @value="' . $command['old'] . '"]')
              ->item(0);
            if ($buildId) {
              $buildId
                ->setAttribute('value', $command['new']);
            }
            break;

            // @todo Add suitable implementations for these commands in order to
            //   have full test coverage of what ajax.js can do.

          // @todo Add suitable implementations for these commands in order to
          //   have full test coverage of what ajax.js can do.
          case 'remove':
            break;
          case 'changed':
            break;
          case 'css':
            break;
          case 'data':
            break;
          case 'restripe':
            break;
          case 'add_css':
            break;
        }
      }
      $content = $dom
        ->saveHTML();
    }
    $this
      ->drupalSetContent($content);
    $this
      ->drupalSetSettings($drupal_settings);
    $verbose = 'AJAX POST request to: ' . $path;
    $verbose .= '<br />AJAX callback path: ' . $ajax_path;
    $verbose .= '<hr />Ending URL: ' . $this
      ->getUrl();
    $verbose .= '<hr />' . $this->content;
    $this
      ->verbose($verbose);
    return $return;
  }

  /**
   * Runs cron in the Drupal installed by Simpletest.
   */
  protected function cronRun() {
    $this
      ->drupalGet($GLOBALS['base_url'] . '/cron.php', array(
      'external' => TRUE,
      'query' => array(
        'cron_key' => variable_get('cron_key', 'drupal'),
      ),
    ));
  }

  /**
   * Check for meta refresh tag and if found call drupalGet() recursively. This
   * function looks for the http-equiv attribute to be set to "Refresh"
   * and is case-sensitive.
   *
   * @return
   *   Either the new page content or FALSE.
   */
  protected function checkForMetaRefresh() {
    if (strpos($this
      ->drupalGetContent(), '<meta ') && $this
      ->parse()) {
      $refresh = $this
        ->xpath('//meta[@http-equiv="Refresh"]');
      if (!empty($refresh)) {

        // Parse the content attribute of the meta tag for the format:
        // "[delay]: URL=[page_to_redirect_to]".
        if (preg_match('/\\d+;\\s*URL=(?P<url>.*)/i', $refresh[0]['content'], $match)) {
          return $this
            ->drupalGet($this
            ->getAbsoluteUrl(decode_entities($match['url'])));
        }
      }
    }
    return FALSE;
  }

  /**
   * Retrieves only the headers for a Drupal path or an absolute path.
   *
   * @param $path
   *   Drupal path or URL to load into internal browser
   * @param $options
   *   Options to be forwarded to url().
   * @param $headers
   *   An array containing additional HTTP request headers, each formatted as
   *   "name: value".
   * @return
   *   The retrieved headers, also available as $this->drupalGetContent()
   */
  protected function drupalHead($path, array $options = array(), array $headers = array()) {
    $options['absolute'] = TRUE;
    $out = $this
      ->curlExec(array(
      CURLOPT_NOBODY => TRUE,
      CURLOPT_URL => url($path, $options),
      CURLOPT_HTTPHEADER => $headers,
    ));
    $this
      ->refreshVariables();

    // Ensure that any changes to variables in the other thread are picked up.
    return $out;
  }

  /**
   * Handle form input related to drupalPost(). Ensure that the specified fields
   * exist and attempt to create POST data in the correct manner for the particular
   * field type.
   *
   * @param $post
   *   Reference to array of post values.
   * @param $edit
   *   Reference to array of edit values to be checked against the form.
   * @param $submit
   *   Form submit button value.
   * @param $form
   *   Array of form elements.
   * @return
   *   Submit value matches a valid submit input in the form.
   */
  protected function handleForm(&$post, &$edit, &$upload, $submit, $form) {

    // Retrieve the form elements.
    $elements = $form
      ->xpath('.//input[not(@disabled)]|.//textarea[not(@disabled)]|.//select[not(@disabled)]');
    $submit_matches = FALSE;
    foreach ($elements as $element) {

      // SimpleXML objects need string casting all the time.
      $name = (string) $element['name'];

      // This can either be the type of <input> or the name of the tag itself
      // for <select> or <textarea>.
      $type = isset($element['type']) ? (string) $element['type'] : $element
        ->getName();
      $value = isset($element['value']) ? (string) $element['value'] : '';
      $done = FALSE;
      if (isset($edit[$name])) {
        switch ($type) {
          case 'text':
          case 'tel':
          case 'textarea':
          case 'url':
          case 'number':
          case 'range':
          case 'color':
          case 'hidden':
          case 'password':
          case 'email':
          case 'search':
            $post[$name] = $edit[$name];
            unset($edit[$name]);
            break;
          case 'radio':
            if ($edit[$name] == $value) {
              $post[$name] = $edit[$name];
              unset($edit[$name]);
            }
            break;
          case 'checkbox':

            // To prevent checkbox from being checked.pass in a FALSE,
            // otherwise the checkbox will be set to its value regardless
            // of $edit.
            if ($edit[$name] === FALSE) {
              unset($edit[$name]);
              continue 2;
            }
            else {
              unset($edit[$name]);
              $post[$name] = $value;
            }
            break;
          case 'select':
            $new_value = $edit[$name];
            $options = $this
              ->getAllOptions($element);
            if (is_array($new_value)) {

              // Multiple select box.
              if (!empty($new_value)) {
                $index = 0;
                $key = preg_replace('/\\[\\]$/', '', $name);
                foreach ($options as $option) {
                  $option_value = (string) $option['value'];
                  if (in_array($option_value, $new_value)) {
                    $post[$key . '[' . $index++ . ']'] = $option_value;
                    $done = TRUE;
                    unset($edit[$name]);
                  }
                }
              }
              else {

                // No options selected: do not include any POST data for the
                // element.
                $done = TRUE;
                unset($edit[$name]);
              }
            }
            else {

              // Single select box.
              foreach ($options as $option) {
                if ($new_value == $option['value']) {
                  $post[$name] = $new_value;
                  unset($edit[$name]);
                  $done = TRUE;
                  break;
                }
              }
            }
            break;
          case 'file':
            $upload[$name] = $edit[$name];
            unset($edit[$name]);
            break;
        }
      }
      if (!isset($post[$name]) && !$done) {
        switch ($type) {
          case 'textarea':
            $post[$name] = (string) $element;
            break;
          case 'select':
            $single = empty($element['multiple']);
            $first = TRUE;
            $index = 0;
            $key = preg_replace('/\\[\\]$/', '', $name);
            $options = $this
              ->getAllOptions($element);
            foreach ($options as $option) {

              // For single select, we load the first option, if there is a
              // selected option that will overwrite it later.
              if ($option['selected'] || $first && $single) {
                $first = FALSE;
                if ($single) {
                  $post[$name] = (string) $option['value'];
                }
                else {
                  $post[$key . '[' . $index++ . ']'] = (string) $option['value'];
                }
              }
            }
            break;
          case 'file':
            break;
          case 'submit':
          case 'image':
            if (isset($submit) && $submit == $value) {
              $post[$name] = $value;
              $submit_matches = TRUE;
            }
            break;
          case 'radio':
          case 'checkbox':
            if (!isset($element['checked'])) {
              break;
            }

            // Deliberate no break.

          // Deliberate no break.
          default:
            $post[$name] = $value;
        }
      }
    }
    return $submit_matches;
  }

  /**
   * Builds an XPath query.
   *
   * Builds an XPath query by replacing placeholders in the query by the value
   * of the arguments.
   *
   * XPath 1.0 (the version supported by libxml2, the underlying XML library
   * used by PHP) doesn't support any form of quotation. This function
   * simplifies the building of XPath expression.
   *
   * @param $xpath
   *   An XPath query, possibly with placeholders in the form ':name'.
   * @param $args
   *   An array of arguments with keys in the form ':name' matching the
   *   placeholders in the query. The values may be either strings or numeric
   *   values.
   * @return
   *   An XPath query with arguments replaced.
   */
  protected function buildXPathQuery($xpath, array $args = array()) {

    // Replace placeholders.
    foreach ($args as $placeholder => $value) {

      // XPath 1.0 doesn't support a way to escape single or double quotes in a
      // string literal. We split double quotes out of the string, and encode
      // them separately.
      if (is_string($value)) {

        // Explode the text at the quote characters.
        $parts = explode('"', $value);

        // Quote the parts.
        foreach ($parts as &$part) {
          $part = '"' . $part . '"';
        }

        // Return the string.
        $value = count($parts) > 1 ? 'concat(' . implode(', \'"\', ', $parts) . ')' : $parts[0];
      }
      $xpath = preg_replace('/' . preg_quote($placeholder) . '\\b/', $value, $xpath);
    }
    return $xpath;
  }

  /**
   * Perform an xpath search on the contents of the internal browser. The search
   * is relative to the root element (HTML tag normally) of the page.
   *
   * @param $xpath
   *   The xpath string to use in the search.
   * @param array $arguments
   *   An array of arguments with keys in the form ':name' matching the
   *   placeholders in the query. The values may be either strings or numeric
   *   values.
   *
   * @return
   *   The return value of the xpath search. For details on the xpath string
   *   format and return values see the SimpleXML documentation,
   *   http://us.php.net/manual/function.simplexml-element-xpath.php.
   */
  protected function xpath($xpath, array $arguments = array()) {
    if ($this
      ->parse()) {
      $xpath = $this
        ->buildXPathQuery($xpath, $arguments);
      $result = $this->elements
        ->xpath($xpath);

      // Some combinations of PHP / libxml versions return an empty array
      // instead of the documented FALSE. Forcefully convert any falsish values
      // to an empty array to allow foreach(...) constructions.
      return $result ? $result : array();
    }
    else {
      return FALSE;
    }
  }

  /**
   * Get all option elements, including nested options, in a select.
   *
   * @param $element
   *   The element for which to get the options.
   * @return
   *   Option elements in select.
   */
  protected function getAllOptions(SimpleXMLElement $element) {
    $options = array();

    // Add all options items.
    foreach ($element->option as $option) {
      $options[] = $option;
    }

    // Search option group children.
    if (isset($element->optgroup)) {
      foreach ($element->optgroup as $group) {
        $options = array_merge($options, $this
          ->getAllOptions($group));
      }
    }
    return $options;
  }

  /**
   * Pass if a link with the specified label is found, and optional with the
   * specified index.
   *
   * @param $label
   *   Text between the anchor tags.
   * @param $index
   *   Link position counting from zero.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertLink($label, $index = 0, $message = '', $group = 'Other') {
    $links = $this
      ->xpath('//a[normalize-space(text())=:label]', array(
      ':label' => $label,
    ));
    $message = $message ? $message : t('Link with label %label found.', array(
      '%label' => $label,
    ));
    return $this
      ->assert(isset($links[$index]), $message, $group);
  }

  /**
   * Pass if a link with the specified label is not found.
   *
   * @param $label
   *   Text between the anchor tags.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertNoLink($label, $message = '', $group = 'Other') {
    $links = $this
      ->xpath('//a[normalize-space(text())=:label]', array(
      ':label' => $label,
    ));
    $message = $message ? $message : t('Link with label %label not found.', array(
      '%label' => $label,
    ));
    return $this
      ->assert(empty($links), $message, $group);
  }

  /**
   * Pass if a link containing a given href (part) is found.
   *
   * @param $href
   *   The full or partial value of the 'href' attribute of the anchor tag.
   * @param $index
   *   Link position counting from zero.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   *
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertLinkByHref($href, $index = 0, $message = '', $group = 'Other') {
    $links = $this
      ->xpath('//a[contains(@href, :href)]', array(
      ':href' => $href,
    ));
    $message = $message ? $message : t('Link containing href %href found.', array(
      '%href' => $href,
    ));
    return $this
      ->assert(isset($links[$index]), $message, $group);
  }

  /**
   * Pass if a link containing a given href (part) is not found.
   *
   * @param $href
   *   The full or partial value of the 'href' attribute of the anchor tag.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   *
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertNoLinkByHref($href, $message = '', $group = 'Other') {
    $links = $this
      ->xpath('//a[contains(@href, :href)]', array(
      ':href' => $href,
    ));
    $message = $message ? $message : t('No link containing href %href found.', array(
      '%href' => $href,
    ));
    return $this
      ->assert(empty($links), $message, $group);
  }

  /**
   * Follows a link by name.
   *
   * Will click the first link found with this link text by default, or a later
   * one if an index is given. Match is case sensitive with normalized space.
   * The label is translated label.
   *
   * If the link is discovered and clicked, the test passes. Fail otherwise.
   *
   * @param $label
   *   Text between the anchor tags.
   * @param $index
   *   Link position counting from zero.
   * @return
   *   Page contents on success, or FALSE on failure.
   */
  protected function clickLink($label, $index = 0) {
    $url_before = $this
      ->getUrl();
    $urls = $this
      ->xpath('//a[normalize-space(text())=:label]', array(
      ':label' => $label,
    ));
    if (isset($urls[$index])) {
      $url_target = $this
        ->getAbsoluteUrl($urls[$index]['href']);
      $this
        ->pass(t('Clicked link %label (@url_target) from @url_before', array(
        '%label' => $label,
        '@url_target' => $url_target,
        '@url_before' => $url_before,
      )), 'Browser');
      return $this
        ->drupalGet($url_target);
    }
    $this
      ->fail(t('Link %label does not exist on @url_before', array(
      '%label' => $label,
      '@url_before' => $url_before,
    )), 'Browser');
    return FALSE;
  }

  /**
   * Takes a path and returns an absolute path.
   *
   * @param $path
   *   A path from the internal browser content.
   * @return
   *   The $path with $base_url prepended, if necessary.
   */
  protected function getAbsoluteUrl($path) {
    global $base_url, $base_path;
    $parts = parse_url($path);
    if (empty($parts['host'])) {

      // Ensure that we have a string (and no xpath object).
      $path = (string) $path;

      // Strip $base_path, if existent.
      $length = strlen($base_path);
      if (substr($path, 0, $length) === $base_path) {
        $path = substr($path, $length);
      }

      // Ensure that we have an absolute path.
      if (empty($path) || $path[0] !== '/') {
        $path = '/' . $path;
      }

      // Finally, prepend the $base_url.
      $path = $base_url . $path;
    }
    return $path;
  }

  /**
   * Get the current URL from the cURL handler.
   *
   * @return
   *   The current URL.
   */
  protected function getUrl() {
    return $this->url;
  }

  /**
   * Gets the HTTP response headers of the requested page. Normally we are only
   * interested in the headers returned by the last request. However, if a page
   * is redirected or HTTP authentication is in use, multiple requests will be
   * required to retrieve the page. Headers from all requests may be requested
   * by passing TRUE to this function.
   *
   * @param $all_requests
   *   Boolean value specifying whether to return headers from all requests
   *   instead of just the last request. Defaults to FALSE.
   * @return
   *   A name/value array if headers from only the last request are requested.
   *   If headers from all requests are requested, an array of name/value
   *   arrays, one for each request.
   *
   *   The pseudonym ":status" is used for the HTTP status line.
   *
   *   Values for duplicate headers are stored as a single comma-separated list.
   */
  protected function drupalGetHeaders($all_requests = FALSE) {
    $request = 0;
    $headers = array(
      $request => array(),
    );
    foreach ($this->headers as $header) {
      $header = trim($header);
      if ($header === '') {
        $request++;
      }
      else {
        if (strpos($header, 'HTTP/') === 0) {
          $name = ':status';
          $value = $header;
        }
        else {
          list($name, $value) = explode(':', $header, 2);
          $name = strtolower($name);
        }
        if (isset($headers[$request][$name])) {
          $headers[$request][$name] .= ',' . trim($value);
        }
        else {
          $headers[$request][$name] = trim($value);
        }
      }
    }
    if (!$all_requests) {
      $headers = array_pop($headers);
    }
    return $headers;
  }

  /**
   * Gets the value of an HTTP response header. If multiple requests were
   * required to retrieve the page, only the headers from the last request will
   * be checked by default. However, if TRUE is passed as the second argument,
   * all requests will be processed from last to first until the header is
   * found.
   *
   * @param $name
   *   The name of the header to retrieve. Names are case-insensitive (see RFC
   *   2616 section 4.2).
   * @param $all_requests
   *   Boolean value specifying whether to check all requests if the header is
   *   not found in the last request. Defaults to FALSE.
   * @return
   *   The HTTP header value or FALSE if not found.
   */
  protected function drupalGetHeader($name, $all_requests = FALSE) {
    $name = strtolower($name);
    $header = FALSE;
    if ($all_requests) {
      foreach (array_reverse($this
        ->drupalGetHeaders(TRUE)) as $headers) {
        if (isset($headers[$name])) {
          $header = $headers[$name];
          break;
        }
      }
    }
    else {
      $headers = $this
        ->drupalGetHeaders();
      if (isset($headers[$name])) {
        $header = $headers[$name];
      }
    }
    return $header;
  }

  /**
   * Gets the current raw HTML of requested page.
   */
  protected function drupalGetContent() {
    return $this->content;
  }

  /**
   * Gets the value of the Drupal.settings JavaScript variable for the currently loaded page.
   */
  protected function drupalGetSettings() {
    return $this->drupalSettings;
  }

  /**
   * Gets an array containing all e-mails sent during this test case.
   *
   * @param $filter
   *   An array containing key/value pairs used to filter the e-mails that are returned.
   * @return
   *   An array containing e-mail messages captured during the current test.
   */
  protected function drupalGetMails($filter = array()) {
    $captured_emails = variable_get('drupal_test_email_collector', array());
    $filtered_emails = array();
    foreach ($captured_emails as $message) {
      foreach ($filter as $key => $value) {
        if (!isset($message[$key]) || $message[$key] != $value) {
          continue 2;
        }
      }
      $filtered_emails[] = $message;
    }
    return $filtered_emails;
  }

  /**
   * Sets the raw HTML content. This can be useful when a page has been fetched
   * outside of the internal browser and assertions need to be made on the
   * returned page.
   *
   * A good example would be when testing drupal_http_request(). After fetching
   * the page the content can be set and page elements can be checked to ensure
   * that the function worked properly.
   */
  protected function drupalSetContent($content, $url = 'internal:') {
    $this->content = $content;
    $this->url = $url;
    $this->plainTextContent = FALSE;
    $this->elements = FALSE;
    $this->drupalSettings = array();
    if (preg_match('/jQuery\\.extend\\(Drupal\\.settings, (.*?)\\);/', $content, $matches)) {
      $this->drupalSettings = drupal_json_decode($matches[1]);
    }
  }

  /**
   * Sets the value of the Drupal.settings JavaScript variable for the currently loaded page.
   */
  protected function drupalSetSettings($settings) {
    $this->drupalSettings = $settings;
  }

  /**
   * Pass if the internal browser's URL matches the given path.
   *
   * @param $path
   *   The expected system path.
   * @param $options
   *   (optional) Any additional options to pass for $path to url().
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertUrl($path, array $options = array(), $message = '', $group = 'Other') {
    if (!$message) {
      $message = t('Current URL is @url.', array(
        '@url' => var_export(url($path, $options), TRUE),
      ));
    }
    $options['absolute'] = TRUE;
    return $this
      ->assertEqual($this
      ->getUrl(), url($path, $options), $message, $group);
  }

  /**
   * Pass if the raw text IS found on the loaded page, fail otherwise. Raw text
   * refers to the raw HTML that the page generated.
   *
   * @param $raw
   *   Raw (HTML) string to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertRaw($raw, $message = '', $group = 'Other') {
    if (!$message) {
      $message = t('Raw "@raw" found', array(
        '@raw' => $raw,
      ));
    }
    return $this
      ->assert(strpos($this
      ->drupalGetContent(), $raw) !== FALSE, $message, $group);
  }

  /**
   * Pass if the raw text is NOT found on the loaded page, fail otherwise. Raw text
   * refers to the raw HTML that the page generated.
   *
   * @param $raw
   *   Raw (HTML) string to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoRaw($raw, $message = '', $group = 'Other') {
    if (!$message) {
      $message = t('Raw "@raw" not found', array(
        '@raw' => $raw,
      ));
    }
    return $this
      ->assert(strpos($this
      ->drupalGetContent(), $raw) === FALSE, $message, $group);
  }

  /**
   * Pass if the text IS found on the text version of the page. The text version
   * is the equivalent of what a user would see when viewing through a web browser.
   * In other words the HTML has been filtered out of the contents.
   *
   * @param $text
   *   Plain text to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertText($text, $message = '', $group = 'Other') {
    return $this
      ->assertTextHelper($text, $message, $group, FALSE);
  }

  /**
   * Pass if the text is NOT found on the text version of the page. The text version
   * is the equivalent of what a user would see when viewing through a web browser.
   * In other words the HTML has been filtered out of the contents.
   *
   * @param $text
   *   Plain text to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoText($text, $message = '', $group = 'Other') {
    return $this
      ->assertTextHelper($text, $message, $group, TRUE);
  }

  /**
   * Helper for assertText and assertNoText.
   *
   * It is not recommended to call this function directly.
   *
   * @param $text
   *   Plain text to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @param $not_exists
   *   TRUE if this text should not exist, FALSE if it should.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertTextHelper($text, $message = '', $group, $not_exists) {
    if ($this->plainTextContent === FALSE) {
      $this->plainTextContent = filter_xss($this
        ->drupalGetContent(), array());
    }
    if (!$message) {
      $message = !$not_exists ? t('"@text" found', array(
        '@text' => $text,
      )) : t('"@text" not found', array(
        '@text' => $text,
      ));
    }
    return $this
      ->assert($not_exists == (strpos($this->plainTextContent, $text) === FALSE), $message, $group);
  }

  /**
   * Pass if the text is found ONLY ONCE on the text version of the page.
   *
   * The text version is the equivalent of what a user would see when viewing
   * through a web browser. In other words the HTML has been filtered out of
   * the contents.
   *
   * @param $text
   *   Plain text to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertUniqueText($text, $message = '', $group = 'Other') {
    return $this
      ->assertUniqueTextHelper($text, $message, $group, TRUE);
  }

  /**
   * Pass if the text is found MORE THAN ONCE on the text version of the page.
   *
   * The text version is the equivalent of what a user would see when viewing
   * through a web browser. In other words the HTML has been filtered out of
   * the contents.
   *
   * @param $text
   *   Plain text to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to, defaults to 'Other'.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoUniqueText($text, $message = '', $group = 'Other') {
    return $this
      ->assertUniqueTextHelper($text, $message, $group, FALSE);
  }

  /**
   * Helper for assertUniqueText and assertNoUniqueText.
   *
   * It is not recommended to call this function directly.
   *
   * @param $text
   *   Plain text to look for.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @param $be_unique
   *   TRUE if this text should be found only once, FALSE if it should be found more than once.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertUniqueTextHelper($text, $message = '', $group, $be_unique) {
    if ($this->plainTextContent === FALSE) {
      $this->plainTextContent = filter_xss($this
        ->drupalGetContent(), array());
    }
    if (!$message) {
      $message = '"' . $text . '"' . ($be_unique ? ' found only once' : ' found more than once');
    }
    $first_occurance = strpos($this->plainTextContent, $text);
    if ($first_occurance === FALSE) {
      return $this
        ->assert(FALSE, $message, $group);
    }
    $offset = $first_occurance + strlen($text);
    $second_occurance = strpos($this->plainTextContent, $text, $offset);
    return $this
      ->assert($be_unique == ($second_occurance === FALSE), $message, $group);
  }

  /**
   * Will trigger a pass if the Perl regex pattern is found in the raw content.
   *
   * @param $pattern
   *   Perl regex to look for including the regex delimiters.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertPattern($pattern, $message = '', $group = 'Other') {
    if (!$message) {
      $message = t('Pattern "@pattern" found', array(
        '@pattern' => $pattern,
      ));
    }
    return $this
      ->assert((bool) preg_match($pattern, $this
      ->drupalGetContent()), $message, $group);
  }

  /**
   * Will trigger a pass if the perl regex pattern is not present in raw content.
   *
   * @param $pattern
   *   Perl regex to look for including the regex delimiters.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoPattern($pattern, $message = '', $group = 'Other') {
    if (!$message) {
      $message = t('Pattern "@pattern" not found', array(
        '@pattern' => $pattern,
      ));
    }
    return $this
      ->assert(!preg_match($pattern, $this
      ->drupalGetContent()), $message, $group);
  }

  /**
   * Pass if the page title is the given string.
   *
   * @param $title
   *   The string the title should be.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertTitle($title, $message = '', $group = 'Other') {
    $actual = (string) current($this
      ->xpath('//title'));
    if (!$message) {
      $message = t('Page title @actual is equal to @expected.', array(
        '@actual' => var_export($actual, TRUE),
        '@expected' => var_export($title, TRUE),
      ));
    }
    return $this
      ->assertEqual($actual, $title, $message, $group);
  }

  /**
   * Pass if the page title is not the given string.
   *
   * @param $title
   *   The string the title should not be.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoTitle($title, $message = '', $group = 'Other') {
    $actual = (string) current($this
      ->xpath('//title'));
    if (!$message) {
      $message = t('Page title @actual is not equal to @unexpected.', array(
        '@actual' => var_export($actual, TRUE),
        '@unexpected' => var_export($title, TRUE),
      ));
    }
    return $this
      ->assertNotEqual($actual, $title, $message, $group);
  }

  /**
   * Asserts themed output.
   *
   * @param $callback
   *   The name of the theme function to invoke; e.g. 'links' for theme_links().
   * @param $variables
   *   (optional) An array of variables to pass to the theme function.
   * @param $expected
   *   The expected themed output string.
   * @param $message
   *   (optional) A message to display with the assertion. Do not translate
   *   messages: use format_string() to embed variables in the message text, not
   *   t(). If left blank, a default message will be displayed.
   * @param $group
   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertThemeOutput($callback, array $variables = array(), $expected, $message = '', $group = 'Other') {
    $output = theme($callback, $variables);
    $this
      ->verbose('Variables:' . '<pre>' . check_plain(var_export($variables, TRUE)) . '</pre>' . '<hr />' . 'Result:' . '<pre>' . check_plain(var_export($output, TRUE)) . '</pre>' . '<hr />' . 'Expected:' . '<pre>' . check_plain(var_export($expected, TRUE)) . '</pre>' . '<hr />' . $output);
    if (!$message) {
      $message = '%callback rendered correctly.';
    }
    $message = format_string($message, array(
      '%callback' => 'theme_' . $callback . '()',
    ));
    return $this
      ->assertIdentical($output, $expected, $message, $group);
  }

  /**
   * Asserts that a field exists in the current page by the given XPath.
   *
   * @param $xpath
   *   XPath used to find the field.
   * @param $value
   *   (optional) Value of the field to assert. You may pass in NULL (default)
   *   to skip checking the actual value, while still checking that the field
   *   exists.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   (optional) The group this message belongs to.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertFieldByXPath($xpath, $value = NULL, $message = '', $group = 'Other') {
    $fields = $this
      ->xpath($xpath);

    // If value specified then check array for match.
    $found = TRUE;
    if (isset($value)) {
      $found = FALSE;
      if ($fields) {
        foreach ($fields as $field) {
          if (isset($field['value']) && $field['value'] == $value) {

            // Input element with correct value.
            $found = TRUE;
          }
          elseif (isset($field->option)) {

            // Select element found.
            if ($this
              ->getSelectedItem($field) == $value) {
              $found = TRUE;
            }
            else {

              // No item selected so use first item.
              $items = $this
                ->getAllOptions($field);
              if (!empty($items) && $items[0]['value'] == $value) {
                $found = TRUE;
              }
            }
          }
          elseif ((string) $field == $value) {

            // Text area with correct text.
            $found = TRUE;
          }
        }
      }
    }
    return $this
      ->assertTrue($fields && $found, $message, $group);
  }

  /**
   * Get the selected value from a select field.
   *
   * @param $element
   *   SimpleXMLElement select element.
   * @return
   *   The selected value or FALSE.
   */
  protected function getSelectedItem(SimpleXMLElement $element) {
    foreach ($element
      ->children() as $item) {
      if (isset($item['selected'])) {
        return $item['value'];
      }
      elseif ($item
        ->getName() == 'optgroup') {
        if ($value = $this
          ->getSelectedItem($item)) {
          return $value;
        }
      }
    }
    return FALSE;
  }

  /**
   * Asserts that a field doesn't exist or its value doesn't match, by XPath.
   *
   * @param $xpath
   *   XPath used to find the field.
   * @param $value
   *   (optional) Value for the field, to assert that the field's value on the
   *   page doesn't match it. You may pass in NULL to skip checking the
   *   value, while still checking that the field doesn't exist.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   (optional) The group this message belongs to.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoFieldByXPath($xpath, $value = NULL, $message = '', $group = 'Other') {
    $fields = $this
      ->xpath($xpath);

    // If value specified then check array for match.
    $found = TRUE;
    if (isset($value)) {
      $found = FALSE;
      if ($fields) {
        foreach ($fields as $field) {
          if ($field['value'] == $value) {
            $found = TRUE;
          }
        }
      }
    }
    return $this
      ->assertFalse($fields && $found, $message, $group);
  }

  /**
   * Asserts that a field exists in the current page with the given name and value.
   *
   * @param $name
   *   Name of field to assert.
   * @param $value
   *   (optional) Value of the field to assert. You may pass in NULL (default)
   *   to skip checking the actual value, while still checking that the field
   *   exists.
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertFieldByName($name, $value = NULL, $message = NULL) {
    if (!isset($message)) {
      if (!isset($value)) {
        $message = t('Found field with name @name', array(
          '@name' => var_export($name, TRUE),
        ));
      }
      else {
        $message = t('Found field with name @name and value @value', array(
          '@name' => var_export($name, TRUE),
          '@value' => var_export($value, TRUE),
        ));
      }
    }
    return $this
      ->assertFieldByXPath($this
      ->constructFieldXpath('name', $name), $value, $message, t('Browser'));
  }

  /**
   * Asserts that a field does not exist with the given name and value.
   *
   * @param $name
   *   Name of field to assert.
   * @param $value
   *   (optional) Value for the field, to assert that the field's value on the
   *   page doesn't match it. You may pass in NULL to skip checking the
   *   value, while still checking that the field doesn't exist. However, the
   *   default value ('') asserts that the field value is not an empty string.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoFieldByName($name, $value = '', $message = '') {
    return $this
      ->assertNoFieldByXPath($this
      ->constructFieldXpath('name', $name), $value, $message ? $message : t('Did not find field by name @name', array(
      '@name' => $name,
    )), t('Browser'));
  }

  /**
   * Asserts that a field exists in the current page with the given ID and value.
   *
   * @param $id
   *   ID of field to assert.
   * @param $value
   *   (optional) Value for the field to assert. You may pass in NULL to skip
   *   checking the value, while still checking that the field exists.
   *   However, the default value ('') asserts that the field value is an empty
   *   string.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertFieldById($id, $value = '', $message = '') {
    return $this
      ->assertFieldByXPath($this
      ->constructFieldXpath('id', $id), $value, $message ? $message : t('Found field by id @id', array(
      '@id' => $id,
    )), t('Browser'));
  }

  /**
   * Asserts that a field does not exist with the given ID and value.
   *
   * @param $id
   *   ID of field to assert.
   * @param $value
   *   (optional) Value for the field, to assert that the field's value on the
   *   page doesn't match it. You may pass in NULL to skip checking the value,
   *   while still checking that the field doesn't exist. However, the default
   *   value ('') asserts that the field value is not an empty string.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoFieldById($id, $value = '', $message = '') {
    return $this
      ->assertNoFieldByXPath($this
      ->constructFieldXpath('id', $id), $value, $message ? $message : t('Did not find field by id @id', array(
      '@id' => $id,
    )), t('Browser'));
  }

  /**
   * Asserts that a checkbox field in the current page is checked.
   *
   * @param $id
   *   ID of field to assert.
   * @param $message
   *   (optional) Message to display.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertFieldChecked($id, $message = '') {
    $elements = $this
      ->xpath('//input[@id=:id]', array(
      ':id' => $id,
    ));
    return $this
      ->assertTrue(isset($elements[0]) && !empty($elements[0]['checked']), $message ? $message : t('Checkbox field @id is checked.', array(
      '@id' => $id,
    )), t('Browser'));
  }

  /**
   * Asserts that a checkbox field in the current page is not checked.
   *
   * @param $id
   *   ID of field to assert.
   * @param $message
   *   (optional) Message to display.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoFieldChecked($id, $message = '') {
    $elements = $this
      ->xpath('//input[@id=:id]', array(
      ':id' => $id,
    ));
    return $this
      ->assertTrue(isset($elements[0]) && empty($elements[0]['checked']), $message ? $message : t('Checkbox field @id is not checked.', array(
      '@id' => $id,
    )), t('Browser'));
  }

  /**
   * Asserts that a select option in the current page is checked.
   *
   * @param $id
   *   ID of select field to assert.
   * @param $option
   *   Option to assert.
   * @param $message
   *   (optional) Message to display.
   * @return
   *   TRUE on pass, FALSE on fail.
   *
   * @todo $id is unusable. Replace with $name.
   */
  protected function assertOptionSelected($id, $option, $message = '') {
    $elements = $this
      ->xpath('//select[@id=:id]//option[@value=:option]', array(
      ':id' => $id,
      ':option' => $option,
    ));
    return $this
      ->assertTrue(isset($elements[0]) && !empty($elements[0]['selected']), $message ? $message : t('Option @option for field @id is selected.', array(
      '@option' => $option,
      '@id' => $id,
    )), t('Browser'));
  }

  /**
   * Asserts that a select option in the current page is not checked.
   *
   * @param $id
   *   ID of select field to assert.
   * @param $option
   *   Option to assert.
   * @param $message
   *   (optional) Message to display.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoOptionSelected($id, $option, $message = '') {
    $elements = $this
      ->xpath('//select[@id=:id]//option[@value=:option]', array(
      ':id' => $id,
      ':option' => $option,
    ));
    return $this
      ->assertTrue(isset($elements[0]) && empty($elements[0]['selected']), $message ? $message : t('Option @option for field @id is not selected.', array(
      '@option' => $option,
      '@id' => $id,
    )), t('Browser'));
  }

  /**
   * Asserts that a field exists with the given name or ID.
   *
   * @param $field
   *   Name or ID of field to assert.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertField($field, $message = '', $group = 'Other') {
    return $this
      ->assertFieldByXPath($this
      ->constructFieldXpath('name', $field) . '|' . $this
      ->constructFieldXpath('id', $field), NULL, $message, $group);
  }

  /**
   * Asserts that a field does not exist with the given name or ID.
   *
   * @param $field
   *   Name or ID of field to assert.
   * @param $message
   *   (optional) Message to display.
   * @param $group
   *   The group this message belongs to.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoField($field, $message = '', $group = 'Other') {
    return $this
      ->assertNoFieldByXPath($this
      ->constructFieldXpath('name', $field) . '|' . $this
      ->constructFieldXpath('id', $field), NULL, $message, $group);
  }

  /**
   * Asserts that each HTML ID is used for just a single element.
   *
   * @param $message
   *   Message to display.
   * @param $group
   *   The group this message belongs to.
   * @param $ids_to_skip
   *   An optional array of ids to skip when checking for duplicates. It is
   *   always a bug to have duplicate HTML IDs, so this parameter is to enable
   *   incremental fixing of core code. Whenever a test passes this parameter,
   *   it should add a "todo" comment above the call to this function explaining
   *   the legacy bug that the test wishes to ignore and including a link to an
   *   issue that is working to fix that legacy bug.
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertNoDuplicateIds($message = '', $group = 'Other', $ids_to_skip = array()) {
    $status = TRUE;
    foreach ($this
      ->xpath('//*[@id]') as $element) {
      $id = (string) $element['id'];
      if (isset($seen_ids[$id]) && !in_array($id, $ids_to_skip)) {
        $this
          ->fail(t('The HTML ID %id is unique.', array(
          '%id' => $id,
        )), $group);
        $status = FALSE;
      }
      $seen_ids[$id] = TRUE;
    }
    return $this
      ->assert($status, $message, $group);
  }

  /**
   * Helper function: construct an XPath for the given set of attributes and value.
   *
   * @param $attribute
   *   Field attributes.
   * @param $value
   *   Value of field.
   * @return
   *   XPath for specified values.
   */
  protected function constructFieldXpath($attribute, $value) {
    $xpath = '//textarea[@' . $attribute . '=:value]|//input[@' . $attribute . '=:value]|//select[@' . $attribute . '=:value]';
    return $this
      ->buildXPathQuery($xpath, array(
      ':value' => $value,
    ));
  }

  /**
   * Asserts the page responds with the specified response code.
   *
   * @param $code
   *   Response code. For example 200 is a successful page request. For a list
   *   of all codes see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html.
   * @param $message
   *   Message to display.
   * @return
   *   Assertion result.
   */
  protected function assertResponse($code, $message = '') {
    $curl_code = curl_getinfo($this->curlHandle, CURLINFO_HTTP_CODE);
    $match = is_array($code) ? in_array($curl_code, $code) : $curl_code == $code;
    return $this
      ->assertTrue($match, $message ? $message : t('HTTP response expected !code, actual !curl_code', array(
      '!code' => $code,
      '!curl_code' => $curl_code,
    )), t('Browser'));
  }

  /**
   * Asserts the page did not return the specified response code.
   *
   * @param $code
   *   Response code. For example 200 is a successful page request. For a list
   *   of all codes see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html.
   * @param $message
   *   Message to display.
   *
   * @return
   *   Assertion result.
   */
  protected function assertNoResponse($code, $message = '') {
    $curl_code = curl_getinfo($this->curlHandle, CURLINFO_HTTP_CODE);
    $match = is_array($code) ? in_array($curl_code, $code) : $curl_code == $code;
    return $this
      ->assertFalse($match, $message ? $message : t('HTTP response not expected !code, actual !curl_code', array(
      '!code' => $code,
      '!curl_code' => $curl_code,
    )), t('Browser'));
  }

  /**
   * Asserts that the most recently sent e-mail message has the given value.
   *
   * The field in $name must have the content described in $value.
   *
   * @param $name
   *   Name of field or message property to assert. Examples: subject, body, id, ...
   * @param $value
   *   Value of the field to assert.
   * @param $message
   *   Message to display.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertMail($name, $value = '', $message = '') {
    $captured_emails = variable_get('drupal_test_email_collector', array());
    $email = end($captured_emails);
    return $this
      ->assertTrue($email && isset($email[$name]) && $email[$name] == $value, $message, t('E-mail'));
  }

  /**
   * Asserts that the most recently sent e-mail message has the string in it.
   *
   * @param $field_name
   *   Name of field or message property to assert: subject, body, id, ...
   * @param $string
   *   String to search for.
   * @param $email_depth
   *   Number of emails to search for string, starting with most recent.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertMailString($field_name, $string, $email_depth) {
    $mails = $this
      ->drupalGetMails();
    $string_found = FALSE;
    for ($i = sizeof($mails) - 1; $i >= sizeof($mails) - $email_depth && $i >= 0; $i--) {
      $mail = $mails[$i];

      // Normalize whitespace, as we don't know what the mail system might have
      // done. Any run of whitespace becomes a single space.
      $normalized_mail = preg_replace('/\\s+/', ' ', $mail[$field_name]);
      $normalized_string = preg_replace('/\\s+/', ' ', $string);
      $string_found = FALSE !== strpos($normalized_mail, $normalized_string);
      if ($string_found) {
        break;
      }
    }
    return $this
      ->assertTrue($string_found, t('Expected text found in @field of email message: "@expected".', array(
      '@field' => $field_name,
      '@expected' => $string,
    )));
  }

  /**
   * Asserts that the most recently sent e-mail message has the pattern in it.
   *
   * @param $field_name
   *   Name of field or message property to assert: subject, body, id, ...
   * @param $regex
   *   Pattern to search for.
   *
   * @return
   *   TRUE on pass, FALSE on fail.
   */
  protected function assertMailPattern($field_name, $regex, $message) {
    $mails = $this
      ->drupalGetMails();
    $mail = end($mails);
    $regex_found = preg_match("/{$regex}/", $mail[$field_name]);
    return $this
      ->assertTrue($regex_found, t('Expected text found in @field of email message: "@expected".', array(
      '@field' => $field_name,
      '@expected' => $regex,
    )));
  }

  /**
   * Outputs to verbose the most recent $count emails sent.
   *
   * @param $count
   *   Optional number of emails to output.
   */
  protected function verboseEmail($count = 1) {
    $mails = $this
      ->drupalGetMails();
    for ($i = sizeof($mails) - 1; $i >= sizeof($mails) - $count && $i >= 0; $i--) {
      $mail = $mails[$i];
      $this
        ->verbose(t('Email:') . '<pre>' . print_r($mail, TRUE) . '</pre>');
    }
  }

}

Members

Contains filters are case sensitive
Namesort descending Modifiers Type Description Overrides
DrupalTestCase::$assertions protected property Assertions thrown in that test case.
DrupalTestCase::$databasePrefix protected property The database prefix of this test run.
DrupalTestCase::$originalFileDirectory protected property The original file directory, before it was changed for testing purposes.
DrupalTestCase::$results public property Current results of this test case.
DrupalTestCase::$setup protected property Flag to indicate whether the test has been set up.
DrupalTestCase::$setupDatabasePrefix protected property
DrupalTestCase::$setupEnvironment protected property
DrupalTestCase::$skipClasses protected property This class is skipped when looking for the source of an assertion.
DrupalTestCase::$testId protected property The test run ID.
DrupalTestCase::$timeLimit protected property Time limit for the test.
DrupalTestCase::$verboseDirectoryUrl protected property URL to the verbose output file directory.
DrupalTestCase::assert protected function Internal helper: stores the assert.
DrupalTestCase::assertEqual protected function Check to see if two values are equal.
DrupalTestCase::assertFalse protected function Check to see if a value is false (an empty string, 0, NULL, or FALSE).
DrupalTestCase::assertIdentical protected function Check to see if two values are identical.
DrupalTestCase::assertNotEqual protected function Check to see if two values are not equal.
DrupalTestCase::assertNotIdentical protected function Check to see if two values are not identical.
DrupalTestCase::assertNotNull protected function Check to see if a value is not NULL.
DrupalTestCase::assertNull protected function Check to see if a value is NULL.
DrupalTestCase::assertTrue protected function Check to see if a value is not false (not an empty string, 0, NULL, or FALSE).
DrupalTestCase::deleteAssert public static function Delete an assertion record by message ID.
DrupalTestCase::error protected function Fire an error assertion.
DrupalTestCase::errorHandler public function Handle errors during test runs.
DrupalTestCase::exceptionHandler protected function Handle exceptions.
DrupalTestCase::fail protected function Fire an assertion that is always negative.
DrupalTestCase::generatePermutations public static function Converts a list of possible parameters into a stack of permutations.
DrupalTestCase::getAssertionCall protected function Cycles through backtrace until the first non-assertion method is found.
DrupalTestCase::getDatabaseConnection public static function Returns the database connection to the site running Simpletest.
DrupalTestCase::insertAssert public static function Store an assertion from outside the testing context.
DrupalTestCase::pass protected function Fire an assertion that is always positive.
DrupalTestCase::randomName public static function Generates a random string containing letters and numbers.
DrupalTestCase::randomString public static function Generates a random string of ASCII characters of codes 32 to 126.
DrupalTestCase::run public function Run all tests in this class.
DrupalTestCase::verbose protected function Logs a verbose message in a text file.
DrupalWebTestCase::$additionalCurlOptions protected property Additional cURL options.
DrupalWebTestCase::$content protected property The content of the page currently loaded in the internal browser.
DrupalWebTestCase::$cookieFile protected property The current cookie file used by cURL.
DrupalWebTestCase::$cookies protected property The cookies of the page currently loaded in the internal browser.
DrupalWebTestCase::$curlHandle protected property The handle of the current cURL connection.
DrupalWebTestCase::$drupalSettings protected property The value of the Drupal.settings JavaScript variable for the page currently loaded in the internal browser.
DrupalWebTestCase::$elements protected property The parsed version of the page.
DrupalWebTestCase::$generatedTestFiles protected property Whether the files were copied to the test files directory.
DrupalWebTestCase::$headers protected property The headers of the page currently loaded in the internal browser.
DrupalWebTestCase::$httpauth_credentials protected property HTTP authentication credentials (<username>:<password>).
DrupalWebTestCase::$httpauth_method protected property HTTP authentication method
DrupalWebTestCase::$loggedInUser protected property The current user logged in using the internal browser.
DrupalWebTestCase::$originalShutdownCallbacks protected property The original shutdown handlers array, before it was cleaned for testing purposes.
DrupalWebTestCase::$originalUser protected property The original user, before it was changed to a clean uid = 1 for testing purposes.
DrupalWebTestCase::$plainTextContent protected property The content of the page currently loaded in the internal browser (plain text version).
DrupalWebTestCase::$profile protected property The profile to install as a basis for testing.
DrupalWebTestCase::$redirect_count protected property The number of redirects followed during the handling of a request.
DrupalWebTestCase::$session_id protected property The current session ID, if available.
DrupalWebTestCase::$session_name protected property The current session name, if available.
DrupalWebTestCase::$url protected property The URL currently loaded in the internal browser.
DrupalWebTestCase::assertField protected function Asserts that a field exists with the given name or ID.
DrupalWebTestCase::assertFieldById protected function Asserts that a field exists in the current page with the given ID and value.
DrupalWebTestCase::assertFieldByName protected function Asserts that a field exists in the current page with the given name and value.
DrupalWebTestCase::assertFieldByXPath protected function Asserts that a field exists in the current page by the given XPath.
DrupalWebTestCase::assertFieldChecked protected function Asserts that a checkbox field in the current page is checked.
DrupalWebTestCase::assertLink protected function Pass if a link with the specified label is found, and optional with the specified index.
DrupalWebTestCase::assertLinkByHref protected function Pass if a link containing a given href (part) is found.
DrupalWebTestCase::assertMail protected function Asserts that the most recently sent e-mail message has the given value.
DrupalWebTestCase::assertMailPattern protected function Asserts that the most recently sent e-mail message has the pattern in it.
DrupalWebTestCase::assertMailString protected function Asserts that the most recently sent e-mail message has the string in it.
DrupalWebTestCase::assertNoDuplicateIds protected function Asserts that each HTML ID is used for just a single element.
DrupalWebTestCase::assertNoField protected function Asserts that a field does not exist with the given name or ID.
DrupalWebTestCase::assertNoFieldById protected function Asserts that a field does not exist with the given ID and value.
DrupalWebTestCase::assertNoFieldByName protected function Asserts that a field does not exist with the given name and value.
DrupalWebTestCase::assertNoFieldByXPath protected function Asserts that a field doesn't exist or its value doesn't match, by XPath.
DrupalWebTestCase::assertNoFieldChecked protected function Asserts that a checkbox field in the current page is not checked.
DrupalWebTestCase::assertNoLink protected function Pass if a link with the specified label is not found.
DrupalWebTestCase::assertNoLinkByHref protected function Pass if a link containing a given href (part) is not found.
DrupalWebTestCase::assertNoOptionSelected protected function Asserts that a select option in the current page is not checked.
DrupalWebTestCase::assertNoPattern protected function Will trigger a pass if the perl regex pattern is not present in raw content.
DrupalWebTestCase::assertNoRaw protected function Pass if the raw text is NOT found on the loaded page, fail otherwise. Raw text refers to the raw HTML that the page generated.
DrupalWebTestCase::assertNoResponse protected function Asserts the page did not return the specified response code.
DrupalWebTestCase::assertNoText protected function Pass if the text is NOT found on the text version of the page. The text version is the equivalent of what a user would see when viewing through a web browser. In other words the HTML has been filtered out of the contents.
DrupalWebTestCase::assertNoTitle protected function Pass if the page title is not the given string.
DrupalWebTestCase::assertNoUniqueText protected function Pass if the text is found MORE THAN ONCE on the text version of the page.
DrupalWebTestCase::assertOptionSelected protected function Asserts that a select option in the current page is checked.
DrupalWebTestCase::assertPattern protected function Will trigger a pass if the Perl regex pattern is found in the raw content.
DrupalWebTestCase::assertRaw protected function Pass if the raw text IS found on the loaded page, fail otherwise. Raw text refers to the raw HTML that the page generated.
DrupalWebTestCase::assertResponse protected function Asserts the page responds with the specified response code.
DrupalWebTestCase::assertText protected function Pass if the text IS found on the text version of the page. The text version is the equivalent of what a user would see when viewing through a web browser. In other words the HTML has been filtered out of the contents.
DrupalWebTestCase::assertTextHelper protected function Helper for assertText and assertNoText.
DrupalWebTestCase::assertThemeOutput protected function Asserts themed output.
DrupalWebTestCase::assertTitle protected function Pass if the page title is the given string.
DrupalWebTestCase::assertUniqueText protected function Pass if the text is found ONLY ONCE on the text version of the page.
DrupalWebTestCase::assertUniqueTextHelper protected function Helper for assertUniqueText and assertNoUniqueText.
DrupalWebTestCase::assertUrl protected function Pass if the internal browser's URL matches the given path.
DrupalWebTestCase::buildXPathQuery protected function Builds an XPath query.
DrupalWebTestCase::changeDatabasePrefix protected function Changes the database connection to the prefixed one.
DrupalWebTestCase::checkForMetaRefresh protected function Check for meta refresh tag and if found call drupalGet() recursively. This function looks for the http-equiv attribute to be set to "Refresh" and is case-sensitive.
DrupalWebTestCase::checkPermissions protected function Check to make sure that the array of permissions are valid.
DrupalWebTestCase::clickLink protected function Follows a link by name.
DrupalWebTestCase::constructFieldXpath protected function Helper function: construct an XPath for the given set of attributes and value.
DrupalWebTestCase::cronRun protected function Runs cron in the Drupal installed by Simpletest.
DrupalWebTestCase::curlClose protected function Close the cURL handler and unset the handler.
DrupalWebTestCase::curlExec protected function Initializes and executes a cURL request.
DrupalWebTestCase::curlHeaderCallback protected function Reads headers and registers errors received from the tested site.
DrupalWebTestCase::curlInitialize protected function Initializes the cURL connection.
DrupalWebTestCase::drupalCompareFiles protected function Compare two files based on size and file name.
DrupalWebTestCase::drupalCreateContentType protected function Creates a custom content type based on default settings.
DrupalWebTestCase::drupalCreateNode protected function Creates a node based on default settings.
DrupalWebTestCase::drupalCreateRole protected function Creates a role with specified permissions.
DrupalWebTestCase::drupalCreateUser protected function Create a user with a given set of permissions.
DrupalWebTestCase::drupalGet protected function Retrieves a Drupal path or an absolute path.
DrupalWebTestCase::drupalGetAJAX protected function Retrieve a Drupal path or an absolute path and JSON decode the result.
DrupalWebTestCase::drupalGetContent protected function Gets the current raw HTML of requested page.
DrupalWebTestCase::drupalGetHeader protected function Gets the value of an HTTP response header. If multiple requests were required to retrieve the page, only the headers from the last request will be checked by default. However, if TRUE is passed as the second argument, all requests will be processed…
DrupalWebTestCase::drupalGetHeaders protected function Gets the HTTP response headers of the requested page. Normally we are only interested in the headers returned by the last request. However, if a page is redirected or HTTP authentication is in use, multiple requests will be required to retrieve the…
DrupalWebTestCase::drupalGetMails protected function Gets an array containing all e-mails sent during this test case.
DrupalWebTestCase::drupalGetNodeByTitle function Get a node from the database based on its title.
DrupalWebTestCase::drupalGetSettings protected function Gets the value of the Drupal.settings JavaScript variable for the currently loaded page.
DrupalWebTestCase::drupalGetTestFiles protected function Get a list files that can be used in tests.
DrupalWebTestCase::drupalGetToken protected function Generate a token for the currently logged in user.
DrupalWebTestCase::drupalHead protected function Retrieves only the headers for a Drupal path or an absolute path.
DrupalWebTestCase::drupalLogin protected function Log in a user with the internal browser.
DrupalWebTestCase::drupalLogout protected function
DrupalWebTestCase::drupalPost protected function Execute a POST request on a Drupal page. It will be done as usual POST request with SimpleBrowser.
DrupalWebTestCase::drupalPostAJAX protected function Execute an Ajax submission.
DrupalWebTestCase::drupalSetContent protected function Sets the raw HTML content. This can be useful when a page has been fetched outside of the internal browser and assertions need to be made on the returned page.
DrupalWebTestCase::drupalSetSettings protected function Sets the value of the Drupal.settings JavaScript variable for the currently loaded page.
DrupalWebTestCase::getAbsoluteUrl protected function Takes a path and returns an absolute path.
DrupalWebTestCase::getAllOptions protected function Get all option elements, including nested options, in a select.
DrupalWebTestCase::getSelectedItem protected function Get the selected value from a select field.
DrupalWebTestCase::getUrl protected function Get the current URL from the cURL handler.
DrupalWebTestCase::handleForm protected function Handle form input related to drupalPost(). Ensure that the specified fields exist and attempt to create POST data in the correct manner for the particular field type.
DrupalWebTestCase::parse protected function Parse content returned from curlExec using DOM and SimpleXML.
DrupalWebTestCase::preloadRegistry protected function Preload the registry from the testing site.
DrupalWebTestCase::prepareDatabasePrefix protected function Generates a database prefix for running tests.
DrupalWebTestCase::prepareEnvironment protected function Prepares the current environment for running the test.
DrupalWebTestCase::refreshVariables protected function Refresh the in-memory set of variables. Useful after a page request is made that changes a variable in a different thread.
DrupalWebTestCase::resetAll protected function Reset all data structures after having enabled new modules.
DrupalWebTestCase::setUp protected function Sets up a Drupal site for running functional and integration tests.
DrupalWebTestCase::tearDown protected function Delete created files and temporary files directory, delete the tables created by setUp(), and reset the database prefix.
DrupalWebTestCase::verboseEmail protected function Outputs to verbose the most recent $count emails sent.
DrupalWebTestCase::xpath protected function Perform an xpath search on the contents of the internal browser. The search is relative to the root element (HTML tag normally) of the page.
DrupalWebTestCase::__construct function Constructor for DrupalWebTestCase. Overrides DrupalTestCase::__construct

Comments

dgtlmoon’s picture

Here is a really good way to waste your employers time

Unless I'm missing something obvious, if you set the User-Agent to something else then you might suddenly notice that your database has disappeared or for example $this->drupalGet("node/1") returns '404' when earlier in your test it worked.

For example;

    $this->additionalCurlOptions[CURLOPT_USERAGENT] = $test_bot_ua;

problem is, includes/common.inc relies on the User-Agent to switch database/table prefixes

from includes/common.inc

  // If the database prefix is being used by SimpleTest to run the tests in a copied
  // database then set the user-agent header to the database prefix so that any
  // calls to other Drupal pages will run the SimpleTest prefixed database. The
  // user-agent is used to ensure that multiple testing sessions running at the
  // same time won't interfere with each other as they would if the database
  // prefix were stored statically in a file or database variable.

And if you look at the tcpdump of the session

User-Agent: simpletest146234;1332462090;4f6bc20ad28958.38110168;hN5HgdF_lSDcf0m-kAb8ykqmlU7GZruT8f5yLq53_lM

Ouch! nice one!