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<?php

/**
 * Global variable that holds information about the tests being run.
 *
 * An array, with the following keys:
 *  - 'test_run_id': the ID of the test being run, in the form 'simpletest_%"
 *  - 'in_child_site': TRUE if the current request is a cURL request from
 *     the parent site.
 *
 * @var array
 */
global $drupal_test_info;

/**
 * Base class for Drupal tests.
 *
 * Do not extend this class, use one of the subclasses in this file.
 */
abstract class DrupalTestCase {
 
/**
   * The test run ID.
   *
   * @var string
   */
 
protected $testId;

 
/**
   * The database prefix of this test run.
   *
   * @var string
   */
 
protected $databasePrefix = NULL;

 
/**
   * The original file directory, before it was changed for testing purposes.
   *
   * @var string
   */
 
protected $originalFileDirectory = NULL;

 
/**
   * URL to the verbose output file directory.
   *
   * @var string
   */
 
protected $verboseDirectoryUrl;

 
/**
   * Time limit for the test.
   */
 
protected $timeLimit = 500;

 
/**
   * Whether to cache the installation part of the setUp() method.
   *
   * @var bool
   */
 
public $useSetupInstallationCache = FALSE;

 
/**
   * Whether to cache the modules installation part of the setUp() method.
   *
   * @var bool
   */
 
public $useSetupModulesCache = FALSE;

 
/**
   * Current results of this test case.
   *
   * @var Array
   */
 
public $results = array(
   
'#pass' => 0,
   
'#fail' => 0,
   
'#exception' => 0,
   
'#debug' => 0,
  );

 
/**
   * Assertions thrown in that test case.
   *
   * @var Array
   */
 
protected $assertions = array();

 
/**
   * This class is skipped when looking for the source of an assertion.
   *
   * When displaying which function an assert comes from, it's not too useful
   * to see "drupalWebTestCase->drupalLogin()', we would like to see the test
   * that called it. So we need to skip the classes defining these helper
   * methods.
   */
 
protected $skipClasses = array(__CLASS__ => TRUE);

 
/**
   * Flag to indicate whether the test has been set up.
   *
   * The setUp() method isolates the test from the parent Drupal site by
   * creating a random prefix for the database and setting up a clean file
   * storage directory. The tearDown() method then cleans up this test
   * environment. We must ensure that setUp() has been run. Otherwise,
   * tearDown() will act on the parent Drupal site rather than the test
   * environment, destroying live data.
   */
 
protected $setup = FALSE;

  protected
$setupDatabasePrefix = FALSE;

  protected
$setupEnvironment = FALSE;

 
/**
   * Constructor for DrupalTestCase.
   *
   * @param $test_id
   *   Tests with the same id are reported together.
   */
 
public function __construct($test_id = NULL) {
   
$this->testId = $test_id;
  }

 
/**
   * Internal helper: stores the assert.
   *
   * @param $status
   *   Can be 'pass', 'fail', 'exception'.
   *   TRUE is a synonym for 'pass', FALSE for 'fail'.
   * @param $message
   *   The message string.
   * @param $group
   *   Which group this assert belongs to.
   * @param $caller
   *   By default, the assert comes from a function whose name starts with
   *   'test'. Instead, you can specify where this assert originates from
   *   by passing in an associative array as $caller. Key 'file' is
   *   the name of the source file, 'line' is the line number and 'function'
   *   is the caller function itself.
   */
 
protected function assert($status, $message = '', $group = 'Other', array $caller = NULL) {
   
// Convert boolean status to string status.
   
if (is_bool($status)) {
     
$status = $status ? 'pass' : 'fail';
    }

   
// Increment summary result counter.
   
$this->results['#' . $status]++;

   
// Get the function information about the call to the assertion method.
   
if (!$caller) {
     
$caller = $this->getAssertionCall();
    }

   
// Creation assertion array that can be displayed while tests are running.
   
$this->assertions[] = $assertion = array(
     
'test_id' => $this->testId,
     
'test_class' => get_class($this),
     
'status' => $status,
     
'message' => $message,
     
'message_group' => $group,
     
'function' => $caller['function'],
     
'line' => $caller['line'],
     
'file' => $caller['file'],
    );

   
// Store assertion for display after the test has completed.
   
self::getDatabaseConnection()
      ->
insert('simpletest')
      ->
fields($assertion)
      ->
execute();

   
// We do not use a ternary operator here to allow a breakpoint on
    // test failure.
   
if ($status == 'pass') {
      return
TRUE;
    }
    else {
      return
FALSE;
    }
  }

 
/**
   * Returns the database connection to the site running Simpletest.
   *
   * @return DatabaseConnection
   *   The database connection to use for inserting assertions.
   */
 
public static function getDatabaseConnection() {
    try {
     
$connection = Database::getConnection('default', 'simpletest_original_default');
    }
    catch (
DatabaseConnectionNotDefinedException $e) {
     
// If the test was not set up, the simpletest_original_default
      // connection does not exist.
     
$connection = Database::getConnection('default', 'default');
    }

    return
$connection;
  }

 
/**
   * Store an assertion from outside the testing context.
   *
   * This is useful for inserting assertions that can only be recorded after
   * the test case has been destroyed, such as PHP fatal errors. The caller
   * information is not automatically gathered since the caller is most likely
   * inserting the assertion on behalf of other code. In all other respects
   * the method behaves just like DrupalTestCase::assert() in terms of storing
   * the assertion.
   *
   * @return
   *   Message ID of the stored assertion.
   *
   * @see DrupalTestCase::assert()
   * @see DrupalTestCase::deleteAssert()
   */
 
public static function insertAssert($test_id, $test_class, $status, $message = '', $group = 'Other', array $caller = array()) {
   
// Convert boolean status to string status.
   
if (is_bool($status)) {
     
$status = $status ? 'pass' : 'fail';
    }

   
$caller += array(
     
'function' => t('Unknown'),
     
'line' => 0,
     
'file' => t('Unknown'),
    );

   
$assertion = array(
     
'test_id' => $test_id,
     
'test_class' => $test_class,
     
'status' => $status,
     
'message' => $message,
     
'message_group' => $group,
     
'function' => $caller['function'],
     
'line' => $caller['line'],
     
'file' => $caller['file'],
    );

    return
self::getDatabaseConnection()
      ->
insert('simpletest')
      ->
fields($assertion)
      ->
execute();
  }

 
/**
   * Delete an assertion record by message ID.
   *
   * @param $message_id
   *   Message ID of the assertion to delete.
   * @return
   *   TRUE if the assertion was deleted, FALSE otherwise.
   *
   * @see DrupalTestCase::insertAssert()
   */
 
public static function deleteAssert($message_id) {
    return (bool)
self::getDatabaseConnection()
      ->
delete('simpletest')
      ->
condition('message_id', $message_id)
      ->
execute();
  }

 
/**
   * Cycles through backtrace until the first non-assertion method is found.
   *
   * @return
   *   Array representing the true caller.
   */
 
protected function getAssertionCall() {
   
$backtrace = debug_backtrace();

   
// The first element is the call. The second element is the caller.
    // We skip calls that occurred in one of the methods of our base classes
    // or in an assertion function.
   
while (($caller = $backtrace[1]) &&
         ((isset(
$caller['class']) && isset($this->skipClasses[$caller['class']])) ||
           
substr($caller['function'], 0, 6) == 'assert')) {
     
// We remove that call.
     
array_shift($backtrace);
    }

    return
_drupal_get_last_caller($backtrace);
  }

 
/**
   * Check to see if a value is not false (not an empty string, 0, NULL, or FALSE).
   *
   * @param $value
   *   The value on which the assertion is to be done.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertTrue($value, $message = '', $group = 'Other') {
    return
$this->assert((bool) $value, $message ? $message : t('Value @value is TRUE.', array('@value' => var_export($value, TRUE))), $group);
  }

 
/**
   * Check to see if a value is false (an empty string, 0, NULL, or FALSE).
   *
   * @param $value
   *   The value on which the assertion is to be done.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertFalse($value, $message = '', $group = 'Other') {
    return
$this->assert(!$value, $message ? $message : t('Value @value is FALSE.', array('@value' => var_export($value, TRUE))), $group);
  }

 
/**
   * Check to see if a value is NULL.
   *
   * @param $value
   *   The value on which the assertion is to be done.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertNull($value, $message = '', $group = 'Other') {
    return
$this->assert(!isset($value), $message ? $message : t('Value @value is NULL.', array('@value' => var_export($value, TRUE))), $group);
  }

 
/**
   * Check to see if a value is not NULL.
   *
   * @param $value
   *   The value on which the assertion is to be done.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertNotNull($value, $message = '', $group = 'Other') {
    return
$this->assert(isset($value), $message ? $message : t('Value @value is not NULL.', array('@value' => var_export($value, TRUE))), $group);
  }

 
/**
   * Check to see if two values are equal.
   *
   * @param $first
   *   The first value to check.
   * @param $second
   *   The second value to check.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertEqual($first, $second, $message = '', $group = 'Other') {
    return
$this->assert($first == $second, $message ? $message : t('Value @first is equal to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE))), $group);
  }

 
/**
   * Check to see if two values are not equal.
   *
   * @param $first
   *   The first value to check.
   * @param $second
   *   The second value to check.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertNotEqual($first, $second, $message = '', $group = 'Other') {
    return
$this->assert($first != $second, $message ? $message : t('Value @first is not equal to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE))), $group);
  }

 
/**
   * Check to see if two values are identical.
   *
   * @param $first
   *   The first value to check.
   * @param $second
   *   The second value to check.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertIdentical($first, $second, $message = '', $group = 'Other') {
    return
$this->assert($first === $second, $message ? $message : t('Value @first is identical to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE))), $group);
  }

 
/**
   * Check to see if two values are not identical.
   *
   * @param $first
   *   The first value to check.
   * @param $second
   *   The second value to check.
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
 
protected function assertNotIdentical($first, $second, $message = '', $group = 'Other') {
    return
$this->assert($first !== $second, $message ? $message : t('Value @first is not identical to value @second.', array('@first' => var_export($first, TRUE), '@second' => var_export($second, TRUE))), $group);
  }

 
/**
   * Fire an assertion that is always positive.
   *
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   TRUE.
   */
 
protected function pass($message = NULL, $group = 'Other') {
    return
$this->assert(TRUE, $message, $group);
  }

 
/**
   * Fire an assertion that is always negative.
   *
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @return
   *   FALSE.
   */
 
protected function fail($message = NULL, $group = 'Other') {
    return
$this->assert(FALSE, $message, $group);
  }

 
/**
   * Fire an error assertion.
   *
   * @param $message
   *   The message to display along with the assertion.
   * @param $group
   *   The type of assertion - examples are "Browser", "PHP".
   * @param $caller
   *   The caller of the error.
   * @return
   *   FALSE.
   */
 
protected function error($message = '', $group = 'Other', array $caller = NULL) {
    if (
$group == 'User notice') {
     
// Since 'User notice' is set by trigger_error() which is used for debug
      // set the message to a status of 'debug'.
     
return $this->assert('debug', $message, 'Debug', $caller);
    }

    return
$this->assert('exception', $message, $group, $caller);
  }

 
/**
   * Logs a verbose message in a text file.
   *
   * The link to the verbose message will be placed in the test results as a
   * passing assertion with the text '[verbose message]'.
   *
   * @param $message
   *   The verbose message to be stored.
   *
   * @see simpletest_verbose()
   */
 
protected function verbose($message) {
    if (
$id = simpletest_verbose($message)) {
     
$class_safe = str_replace('\\', '_', get_class($this));
     
$url = $this->verboseDirectoryUrl . '/' . $class_safe . '-' . $id . '.html';
     
// Not using l() to avoid invoking the theme system, so that unit tests
      // can use verbose() as well.
     
$link = '<a href="' . $url . '" target="_blank">' . t('Verbose message') . '</a>';
     
$this->error($link, 'User notice');
    }
  }

 
/**
   * Run all tests in this class.
   *
   * Regardless of whether $methods are passed or not, only method names
   * starting with "test" are executed.
   *
   * @param $methods
   *   (optional) A list of method names in the test case class to run; e.g.,
   *   array('testFoo', 'testBar'). By default, all methods of the class are
   *   taken into account, but it can be useful to only run a few selected test
   *   methods during debugging.
   */
 
public function run(array $methods = array()) {
   
// Initialize verbose debugging.
   
$class = get_class($this);
   
simpletest_verbose(NULL, variable_get('file_public_path', conf_path() . '/files'), str_replace('\\', '_', $class));

   
// HTTP auth settings (<username>:<password>) for the simpletest browser
    // when sending requests to the test site.
   
$this->httpauth_method = variable_get('simpletest_httpauth_method', CURLAUTH_BASIC);
   
$username = variable_get('simpletest_httpauth_username', NULL);
   
$password = variable_get('simpletest_httpauth_password', NULL);
    if (
$username && $password) {
     
$this->httpauth_credentials = $username . ':' . $password;
    }

   
set_error_handler(array($this, 'errorHandler'));
   
// Iterate through all the methods in this class, unless a specific list of
    // methods to run was passed.
   
$class_methods = get_class_methods($class);
    if (
$methods) {
     
$class_methods = array_intersect($class_methods, $methods);
    }
    foreach (
$class_methods as $method) {
     
// If the current method starts with "test", run it - it's a test.
     
if (strtolower(substr($method, 0, 4)) == 'test') {
       
// Insert a fail record. This will be deleted on completion to ensure
        // that testing completed.
       
$method_info = new ReflectionMethod($class, $method);
       
$caller = array(
         
'file' => $method_info->getFileName(),
         
'line' => $method_info->getStartLine(),
         
'function' => $class . '->' . $method . '()',
        );
       
$completion_check_id = DrupalTestCase::insertAssert($this->testId, $class, FALSE, t('The test did not complete due to a fatal error.'), 'Completion check', $caller);
       
$this->setUp();
        if (
$this->setup) {
          try {
           
$this->$method();
           
// Finish up.
         
}
          catch (
Exception $e) {
           
$this->exceptionHandler($e);
          }
         
$this->tearDown();
        }
        else {
         
$this->fail(t("The test cannot be executed because it has not been set up properly."));
        }
       
// Remove the completion check record.
       
DrupalTestCase::deleteAssert($completion_check_id);
      }
    }
   
// Clear out the error messages and restore error handler.
   
drupal_get_messages();
   
restore_error_handler();
  }

 
/**
   * Handle errors during test runs.
   *
   * Because this is registered in set_error_handler(), it has to be public.
   * @see set_error_handler
   */
 
public function errorHandler($severity, $message, $file = NULL, $line = NULL) {
    if (
$severity & error_reporting()) {
     
$error_map = array(
       
E_STRICT => 'Run-time notice',
       
E_WARNING => 'Warning',
       
E_NOTICE => 'Notice',
       
E_CORE_ERROR => 'Core error',
       
E_CORE_WARNING => 'Core warning',
       
E_USER_ERROR => 'User error',
       
E_USER_WARNING => 'User warning',
       
E_USER_NOTICE => 'User notice',
       
E_RECOVERABLE_ERROR => 'Recoverable error',
      );

     
// PHP 5.3 adds new error logging constants. Add these conditionally for
      // backwards compatibility with PHP 5.2.
     
if (defined('E_DEPRECATED')) {
       
$error_map += array(
         
E_DEPRECATED => 'Deprecated',
         
E_USER_DEPRECATED => 'User deprecated',
        );
      }

     
$backtrace = debug_backtrace();
     
$this->error($message, $error_map[$severity], _drupal_get_last_caller($backtrace));
    }
    return
TRUE;
  }

 
/**
   * Handle exceptions.
   *
   * @see set_exception_handler
   */
 
protected function exceptionHandler($exception) {
   
$backtrace = $exception->getTrace();
   
// Push on top of the backtrace the call that generated the exception.
   
array_unshift($backtrace, array(
     
'line' => $exception->getLine(),
     
'file' => $exception->getFile(),
    ));
    require_once
DRUPAL_ROOT . '/includes/errors.inc';
   
// The exception message is run through check_plain() by _drupal_decode_exception().
   
$this->error(t('%type: !message in %function (line %line of %file).', _drupal_decode_exception($exception)), 'Uncaught exception', _drupal_get_last_caller($backtrace));
  }

 
/**
   * Generates a random string of ASCII characters of codes 32 to 126.
   *
   * The generated string includes alpha-numeric characters and common
   * miscellaneous characters. Use this method when testing general input
   * where the content is not restricted.
   *
   * Do not use this method when special characters are not possible (e.g., in
   * machine or file names that have already been validated); instead,
   * use DrupalWebTestCase::randomName().
   *
   * @param $length
   *   Length of random string to generate.
   *
   * @return
   *   Randomly generated string.
   *
   * @see DrupalWebTestCase::randomName()
   */
 
public static function randomString($length = 8) {
   
$str = '';
    for (
$i = 0; $i < $length; $i++) {
     
$str .= chr(mt_rand(32, 126));
    }
    return
$str;
  }

 
/**
   * Generates a random string containing letters and numbers.
   *
   * The string will always start with a letter. The letters may be upper or
   * lower case. This method is better for restricted inputs that do not
   * accept certain characters. For example, when testing input fields that
   * require machine readable values (i.e. without spaces and non-standard
   * characters) this method is best.
   *
   * Do not use this method when testing unvalidated user input. Instead, use
   * DrupalWebTestCase::randomString().
   *
   * @param $length
   *   Length of random string to generate.
   *
   * @return
   *   Randomly generated string.
   *
   * @see DrupalWebTestCase::randomString()
   */
 
public static function randomName($length = 8) {
   
$values = array_merge(range(65, 90), range(97, 122), range(48, 57));
   
$max = count($values) - 1;
   
$str = chr(mt_rand(97, 122));
    for (
$i = 1; $i < $length; $i++) {
     
$str .= chr($values[mt_rand(0, $max)]);
    }
    return
$str;
  }

 
/**
   * Converts a list of possible parameters into a stack of permutations.
   *
   * Takes a list of parameters containing possible values, and converts all of
   * them into a list of items containing every possible permutation.
   *
   * Example:
   * @code
   * $parameters = array(
   *   'one' => array(0, 1),
   *   'two' => array(2, 3),
   * );
   * $permutations = DrupalTestCase::generatePermutations($parameters)
   * // Result:
   * $permutations == array(
   *   array('one' => 0, 'two' => 2),
   *   array('one' => 1, 'two' => 2),
   *   array('one' => 0, 'two' => 3),
   *   array('one' => 1, 'two' => 3),
   * )
   * @endcode
   *
   * @param $parameters
   *   An associative array of parameters, keyed by parameter name, and whose
   *   values are arrays of parameter values.
   *
   * @return
   *   A list of permutations, which is an array of arrays. Each inner array
   *   contains the full list of parameters that have been passed, but with a
   *   single value only.
   */
 
public static function generatePermutations($parameters) {
   
$all_permutations = array(array());
    foreach (
$parameters as $parameter => $values) {
     
$new_permutations = array();
     
// Iterate over all values of the parameter.
     
foreach ($values as $value) {
       
// Iterate over all existing permutations.
       
foreach ($all_permutations as $permutation) {
         
// Add the new parameter value to existing permutations.
         
$new_permutations[] = $permutation + array($parameter => $value);
        }
      }
     
// Replace the old permutations with the new permutations.
     
$all_permutations = $new_permutations;
    }
    return
$all_permutations;
  }
}

/**
 * Test case for Drupal unit tests.
 *
 * These tests can not access the database nor files. Calling any Drupal
 * function that needs the database will throw exceptions. These include
 * watchdog(), module_implements(), module_invoke_all() etc.
 */
class DrupalUnitTestCase extends DrupalTestCase {

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

 
/**
   * Sets up unit test environment.
   *
   * Unlike DrupalWebTestCase::setUp(), DrupalUnitTestCase::setUp() does not
   * install modules because tests are performed without accessing the database.
   * Any required files must be explicitly included by the child class setUp()
   * method.
   */
 
protected function setUp() {
    global
$conf, $language;

   
// Store necessary current values before switching to the test environment.
   
$this->originalFileDirectory = variable_get('file_public_path', conf_path() . '/files');
   
$this->verboseDirectoryUrl = file_create_url($this->originalFileDirectory . '/simpletest/verbose');

   
// Set up English language.
   
$this->originalLanguage = $language;
   
$this->originalLanguageDefault = variable_get('language_default');
    unset(
$conf['language_default']);
   
$language = language_default();

   
// Reset all statics so that test is performed with a clean environment.
   
drupal_static_reset();

   
// Generate temporary prefixed database to ensure that tests have a clean starting point.
   
$this->databasePrefix = Database::getConnection()->prefixTables('{simpletest' . mt_rand(1000, 1000000) . '}');

   
// Create test directory.
   
$public_files_directory = $this->originalFileDirectory . '/simpletest/' . substr($this->databasePrefix, 10);
   
file_prepare_directory($public_files_directory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
   
$conf['file_public_path'] = $public_files_directory;

   
// 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']);

   
// Set user agent to be consistent with web test case.
   
$_SERVER['HTTP_USER_AGENT'] = $this->databasePrefix;

   
// If locale is enabled then t() will try to access the database and
    // subsequently will fail as the database is not accessible.
   
$module_list = module_list();
    if (isset(
$module_list['locale'])) {
     
// Transform the list into the format expected as input to module_list().
     
foreach ($module_list as &$module) {
       
$module = array('filename' => drupal_get_filename('module', $module));
      }
     
$this->originalModuleList = $module_list;
      unset(
$module_list['locale']);
     
module_list(TRUE, FALSE, FALSE, $module_list);
    }
   
$this->setup = TRUE;
  }

  protected function
tearDown() {
    global
$conf, $language;

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

   
$conf['file_public_path'] = $this->originalFileDirectory;
   
// Restore modules if necessary.
   
if (isset($this->originalModuleList)) {
     
module_list(TRUE, FALSE, FALSE, $this->originalModuleList);
    }

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

/**
 * Test case for typical Drupal tests.
 */
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;
  }

 
/**
   * Copies the cached tables and files for a cached installation setup.
   *
   * @param string $cache_key_prefix
   *   (optional) Additional prefix for the cache key.
   *
   * @return bool
   *   TRUE when the cache was usable and loaded, FALSE when cache was not
   *   available.
   *
   * @see DrupalWebTestCase::setUp()
   */
 
protected function loadSetupCache($cache_key_prefix = '') {
   
$cache_key = $this->getSetupCacheKey($cache_key_prefix);
   
$cache_file = $this->originalFileDirectory . '/simpletest/' . $cache_key . '/simpletest-cache-setup';

    if (
file_exists($cache_file)) {
      return
$this->copySetupCache($cache_key, substr($this->databasePrefix, 10));
    }

    return
FALSE;
  }

 
/**
   * Returns the cache key used for the setup caching.
   *
   * @param string $cache_key_prefix
   *   (optional) Additional prefix for the cache key.
   *
   * @return string
   *   The cache key to use, by default only based on the profile used by the
   *   test.
   */
 
protected function getSetupCacheKey($cache_key_prefix = '') {
   
// The cache key needs to start with a numeric character, so that the cached
    // installation gets cleaned up properly.
   
$cache_key_prefix = hash('crc32b', $cache_key_prefix . $this->profile);
    return
'1c' . $cache_key_prefix;
  }

 
/**
   * Store the installation setup to a cache.
   *
   * @param string $cache_key_prefix
   *   (optional) Additional prefix for the cache key.
   *
   * @return bool
   *   TRUE if the installation was stored in the cache, FALSE otherwise.
   */
 
protected function storeSetupCache($cache_key_prefix = '') {
   
$cache_key = $this->getSetupCacheKey($cache_key_prefix);
   
$lock_key = 'simpletest_store_cache_' . $cache_key . '_' . $this->testId;

   
// All concurrent tests share the same test id. Therefore it is possible to
    // use the lock to ensure that only one process will store the cache. This
    // is important as else DB tables created by one process could be deleted
    // by another as the cache copying is idempotent.
   
if (! lock_acquire($lock_key)) {
      return
FALSE;
    }

   
// Try to copy the installation to the setup cache - now that we have a
    // lock to do so.
   
if (!$this->copySetupCache(substr($this->databasePrefix, 10), $cache_key)) {
     
// It is non-fatal if the cache cannot be copied as the next test run
      // will try it again.
     
$this->assert('debug', t('Storing cache with key @key failed', array('@key' => $cache_key)), 'storeSetupCache');

     
lock_release($lock_key);
      return
FALSE;
    }

   
// Inform others that this cache is usable now.
   
$cache_file = $this->originalFileDirectory . '/simpletest/' . $cache_key . '/simpletest-cache-setup';
   
file_put_contents($cache_file, time());

   
lock_release($lock_key);
    return
TRUE;
  }

 
/**
   * Copy the setup cache from/to another table and files directory.
   *
   * @param string $from
   *   The prefix_id / cache_key from where to copy.
   * @param string $to
   *   The prefix_id / cache_key to where to copy.
   *
   * @return bool
   *   TRUE if the setup cache was copied to the current installation, FALSE
   *   otherwise.
   */
 
protected function copySetupCache($from, $to) {
   
$from_prefix = 'simpletest' . $from;
   
$to_prefix = 'simpletest' . $to;

    try {
       
$tables = db_query("SHOW TABLES LIKE :prefix", array(':prefix' => db_like($from_prefix) . '%' ))->fetchCol();

       if (
count($tables) == 0) {
         return
FALSE;
       }

       foreach (
$tables as $from_table) {
         
$table = substr($from_table, strlen($from_prefix));
         
$to_table = $to_prefix . $table;

         
// Remove the table in case the copying process was interrupted.
         
db_query('DROP TABLE IF EXISTS ' . $to_table);
         
db_query('CREATE TABLE ' . $to_table . ' LIKE ' . $from_table);
         
db_query('ALTER TABLE ' . $to_table . ' DISABLE KEYS');
         
db_query('INSERT ' . $to_table . ' SELECT * FROM ' . $from_table);
         
db_query('ALTER TABLE ' . $to_table . ' ENABLE KEYS');
       }
    }
    catch (
Exception $e) {
      return
FALSE;
    }

   
$from_dir = $this->originalFileDirectory . '/simpletest/' . $from;
   
$to_dir = $this->originalFileDirectory . '/simpletest/' . $to;
   
$this->recursiveDirectoryCopy($from_dir, $to_dir);

    return
TRUE;
  }

 
/**
   * Recursively copy one directory to another.
   *
   * @param $src
   *   The source directory.
   * @param $dest
   *   The destination directory.
   */
 
protected function recursiveDirectoryCopy($src, $dst) {
   
$dir = opendir($src);

    if (!
file_exists($dst)){
     
mkdir($dst);
    }
    while ((
$file = readdir($dir)) !== FALSE) {
      if (
$file != '.' && $file != '..') {
        if (
is_dir($src . '/' . $file)) {
         
$this->recursiveDirectoryCopy($src . '/' . $file, $dst . '/' . $file);
        }
        else {
         
copy($src . '/' . $file, $dst . '/' . $file);
        }
      }
    }
   
closedir($dir);
  }

 
/**
   * 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;

   
$has_installation_cache = FALSE;
   
$has_modules_cache = FALSE;

    if (
$this->useSetupModulesCache) {
     
$modules = func_get_args();
     
// Modules can be either one parameter or multiple.
     
if (isset($modules[0]) && is_array($modules[0])) {
       
$modules = $modules[0];
      }
     
$modules = array_unique($modules);
     
sort($modules);

     
$modules_cache_key_prefix = hash('crc32b', serialize($modules)) . '_';
     
$has_modules_cache = $this->loadSetupCache($modules_cache_key_prefix);
    }

    if (!
$has_modules_cache && $this->useSetupInstallationCache) {
     
$has_installation_cache = $this->loadSetupCache();
    }

    if (
$has_modules_cache || $has_installation_cache) {
     
// Reset 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);
     
$this->refreshVariables();

     
// Load all enabled modules
     
module_load_all();

     
$this->pass(t('Using cache: @cache (@key)', array(
       
'@cache' => $has_modules_cache ? t('Modules Cache') : t('Installation Cache'),
       
'@key' => $this->getSetupCacheKey($has_modules_cache ? $modules_cache_key_prefix : ''),
      )));
    }
    else {
     
// 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);

      if (
$this->useSetupInstallationCache) {
       
$this->storeSetupCache();
      }
    }

    if (!
$has_modules_cache) {
     
// 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();

      if (
$this->useSetupModulesCache) {
       
$this->storeSetupCache($modules_cache_key_prefix);
      }
    }
    else {
     
// Reset/rebuild all data structures after enabling the modules.
     
$this->resetAll();
    }

   
// 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_d8('%');
    if (empty(
$tables)) {
     
$this->fail('Failed to find test tables to drop.');
    }
    foreach (
$tables as $table) {
      if (
db_drop_table($table)) {
        unset(
$tables[$table]);
      }
    }
    if (!empty(
$tables)) {
     
$this->fail('Failed to drop all prefixed tables.');
    }

   
// In PHP 8 some tests encounter problems when shutdown code tries to
    // access the database connection after it's been explicitly closed, for
    // example the destructor of DrupalCacheArray. We avoid this by not fully
    // destroying the test database connection.
   
$close = \PHP_VERSION_ID < 80000;

   
// Get back to the original connection.
   
Database::removeConnection('default', $close);
   
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);
            }
           
// @todo Ajax commands can target any jQuery selector, but these are
            //   hard to fully emulate with XPath. For now, just handle 'head'
            //   and 'body', since these are used by ajax_render().
           
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.
         
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.
         
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(), (string) $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(), (string) $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
   *   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, $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>');
    }
  }
}

/**
 * Logs verbose message in a text file.
 *
 * If verbose mode is enabled then page requests will be dumped to a file and
 * presented on the test result screen. The messages will be placed in a file
 * located in the simpletest directory in the original file system.
 *
 * @param $message
 *   The verbose message to be stored.
 * @param $original_file_directory
 *   The original file directory, before it was changed for testing purposes.
 * @param $test_class
 *   The active test case class.
 *
 * @return
 *   The ID of the message to be placed in related assertion messages.
 *
 * @see DrupalTestCase->originalFileDirectory
 * @see DrupalWebTestCase->verbose()
 */
function simpletest_verbose($message, $original_file_directory = NULL, $test_class = NULL) {
  static
$file_directory = NULL, $class = NULL, $id = 1, $verbose = NULL;

 
// Will pass first time during setup phase, and when verbose is TRUE.
 
if (!isset($original_file_directory) && !$verbose) {
    return
FALSE;
  }

  if (
$message && $file_directory) {
   
$message = '<hr />ID #' . $id . ' (<a href="' . $class . '-' . ($id - 1) . '.html">Previous</a> | <a href="' . $class . '-' . ($id + 1) . '.html">Next</a>)<hr />' . $message;
   
file_put_contents($file_directory . "/simpletest/verbose/$class-$id.html", $message, FILE_APPEND);
    return
$id++;
  }

  if (
$original_file_directory) {
   
$file_directory = $original_file_directory;
   
$class = $test_class;
   
$verbose = variable_get('simpletest_verbose', TRUE);
   
$directory = $file_directory . '/simpletest/verbose';
   
$writable = file_prepare_directory($directory, FILE_CREATE_DIRECTORY);
    if (
$writable && !file_exists($directory . '/.htaccess')) {
     
file_put_contents($directory . '/.htaccess', "<IfModule mod_expires.c>\nExpiresActive Off\n</IfModule>\n");
    }
    return
$writable;
  }
  return
FALSE;
}