TestBase.php 47.6 KB
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<?php

/**
 * @file
 * Definition of Drupal\simpletest\TestBase.
 */

namespace Drupal\simpletest;

use Drupal\Core\Database\Database;
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use Drupal\Component\Utility\Settings;
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use Drupal\Core\Config\ConfigImporter;
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use Drupal\Core\Config\StorageComparer;
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use Drupal\Core\DependencyInjection\ContainerBuilder;
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use Drupal\Core\Database\ConnectionNotDefinedException;
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use Drupal\Core\Config\StorageInterface;
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use Drupal\Core\DrupalKernel;
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use Drupal\Core\Language\Language;
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use ReflectionMethod;
use ReflectionObject;

/**
 * Base class for Drupal tests.
 *
 * Do not extend this class directly, use either Drupal\simpletest\WebTestBaseBase
 * or Drupal\simpletest\UnitTestBaseBase.
 */
abstract class TestBase {
  /**
   * 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;

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

  /**
   * 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 "WebTestBase->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;

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  protected $setupDatabasePrefix = FALSE;

  protected $setupEnvironment = FALSE;

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  /**
   * TRUE if verbose debugging is enabled.
   *
   * @var boolean
   */
  protected $verbose = FALSE;

  /**
   * Incrementing identifier for verbose output filenames.
   *
   * @var integer
   */
  protected $verboseId = 0;

  /**
   * Safe class name for use in verbose output filenames.
   *
   * Namespaces separator (\) replaced with _.
   *
   * @var string
   */
  protected $verboseClassName;

  /**
   * Directory where verbose output files are put.
   *
   * @var string
   */
  protected $verboseDirectory;

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  /**
   * The original database prefix when running inside Simpletest.
   *
   * @var string
   */
  protected $originalPrefix;

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

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  /**
   * The settings array.
   */
  protected $originalSettings;

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  /**
   * The public file directory for the test environment.
   *
   * This is set in TestBase::prepareEnvironment().
   *
   * @var string
   */
  protected $public_files_directory;

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  /**
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   * Whether to die in case any test assertion fails.
   *
   * @see run-tests.sh
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   *
   * @var boolean
   */
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  public $dieOnFail = FALSE;
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  /**
   * The dependency injection container used in the test.
   *
   * @var \Symfony\Component\DependencyInjection\ContainerInterface
   */
  protected $container;

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  /**
   * The config importer that can used in a test.
   *
   * @var \Drupal\Core\Config\ConfigImporter
   */
  protected $configImporter;

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

  /**
   * Checks the matching requirements for Test.
   *
   * @return
   *   Array of errors containing a list of unmet requirements.
   */
  protected function checkRequirements() {
    return array();
  }

  /**
   * Internal helper: stores the assert.
   *
   * @param $status
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   *   Can be 'pass', 'fail', 'exception', 'debug'.
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   *   TRUE is a synonym for 'pass', FALSE for 'fail'.
   * @param $message
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   *   (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.
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   * @param $group
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   *   (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.
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   * @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.
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    self::getDatabaseConnection()
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      ->insert('simpletest')
      ->fields($assertion)
      ->execute();

    // We do not use a ternary operator here to allow a breakpoint on
    // test failure.
    if ($status == 'pass') {
      return TRUE;
    }
    else {
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      if ($this->dieOnFail && ($status == 'fail' || $status == 'exception')) {
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        exit(1);
      }
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      return FALSE;
    }
  }

  /**
   * 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 Drupal\simpletest\TestBase::assert() in terms
   * of storing the assertion.
   *
   * @return
   *   Message ID of the stored assertion.
   *
   * @see Drupal\simpletest\TestBase::assert()
   * @see Drupal\simpletest\TestBase::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'],
    );

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

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

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

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  /**
   * 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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertTrue($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertFalse($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertNull($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertNotNull($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertEqual($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertNotEqual($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertIdentical($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
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
  protected function assertNotIdentical($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);
  }

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  /**
   * Checks to see if two objects are identical.
   *
   * @param object $object1
   *   The first object to check.
   * @param object $object2
   *   The second object to check.
   * @param $message
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   *
   * @return
   *   TRUE if the assertion succeeded, FALSE otherwise.
   */
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  protected function assertIdenticalObject($object1, $object2, $message = '', $group = 'Other') {
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    $message = $message ?: format_string('!object1 is identical to !object2', array(
      '!object1' => var_export($object1, TRUE),
      '!object2' => var_export($object2, TRUE),
    ));
    $identical = TRUE;
    foreach ($object1 as $key => $value) {
      $identical = $identical && isset($object2->$key) && $object2->$key === $value;
    }
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    return $this->assertTrue($identical, $message, $group);
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  }



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  /**
   * Fire an assertion that is always positive.
   *
   * @param $message
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   TRUE.
   */
  protected function pass($message = NULL, $group = 'Other') {
    return $this->assert(TRUE, $message, $group);
  }

  /**
   * Fire an assertion that is always negative.
   *
   * @param $message
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   *   (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.
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   * @param $group
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   *   (optional) The group this message is in, which is displayed in a column
   *   in test output. Use 'Debug' to indicate this is debugging output. Do not
   *   translate this string. Defaults to 'Other'; most tests do not override
   *   this default.
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   * @return
   *   FALSE.
   */
  protected function fail($message = NULL, $group = 'Other') {
    return $this->assert(FALSE, $message, $group);
  }

  /**
   * Fire an error assertion.
   *
   * @param $message
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   *   (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.
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   * @param $group
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   *   (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.
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   * @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 verbose message in a text file.
   *
   * The a link to the vebose message will be placed in the test results via
   * as a passing assertion with the text '[verbose message]'.
   *
   * @param $message
   *   The verbose message to be stored.
   *
   * @see simpletest_verbose()
   */
  protected function verbose($message) {
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    // Do nothing if verbose debugging is disabled.
    if (!$this->verbose) {
      return;
    }

    $message = '<hr />ID #' . $this->verboseId . ' (<a href="' . $this->verboseClassName . '-' . ($this->verboseId - 1) . '.html">Previous</a> | <a href="' . $this->verboseClassName . '-' . ($this->verboseId + 1) . '.html">Next</a>)<hr />' . $message;
    $verbose_filename = $this->verboseDirectory . '/' . $this->verboseClassName . '-' . $this->verboseId . '.html';
    if (file_put_contents($verbose_filename, $message, FILE_APPEND)) {
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      $url = $this->verboseDirectoryUrl . '/' . $this->verboseClassName . '-' . $this->verboseId . '.html';
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      // Not using l() to avoid invoking the theme system, so that unit tests
      // can use verbose() as well.
      $url = '<a href="' . $url . '" target="_blank">' . t('Verbose message') . '</a>';
      $this->error($url, 'User notice');
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    }
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    $this->verboseId++;
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  }

  /**
   * 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 $methods = array()) {
687
    TestBundle::$currentTest = $this;
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    $simpletest_config = config('simpletest.settings');

690
    $class = get_class($this);
691
    if ($simpletest_config->get('verbose')) {
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      // Initialize verbose debugging.
      $this->verbose = TRUE;
      $this->verboseDirectory = variable_get('file_public_path', conf_path() . '/files') . '/simpletest/verbose';
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      $this->verboseDirectoryUrl = file_create_url($this->verboseDirectory);
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      if (file_prepare_directory($this->verboseDirectory, FILE_CREATE_DIRECTORY) && !file_exists($this->verboseDirectory . '/.htaccess')) {
        file_put_contents($this->verboseDirectory . '/.htaccess', "<IfModule mod_expires.c>\nExpiresActive Off\n</IfModule>\n");
      }
      $this->verboseClassName = str_replace("\\", "_", $class);
    }
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    // HTTP auth settings (<username>:<password>) for the simpletest browser
    // when sending requests to the test site.
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    $this->httpauth_method = (int) $simpletest_config->get('httpauth.method');
    $username = $simpletest_config->get('httpauth.username');
    $password = $simpletest_config->get('httpauth.password');
    if (!empty($username) && !empty($password)) {
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      $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);
    }
    $missing_requirements = $this->checkRequirements();
    if (!empty($missing_requirements)) {
      $missing_requirements_object = new ReflectionObject($this);
      $caller = array(
        'file' => $missing_requirements_object->getFileName(),
      );
      foreach ($missing_requirements as $missing_requirement) {
        TestBase::insertAssert($this->testId, $class, FALSE, $missing_requirement, 'Requirements check.', $caller);
      }
    }
    else {
      foreach ($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 . '()',
          );
          $completion_check_id = TestBase::insertAssert($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.
            }
746
            catch (\Exception $e) {
747 748 749 750 751 752 753 754 755 756 757 758
              $this->exceptionHandler($e);
            }
            $this->tearDown();
          }
          else {
            $this->fail(t("The test cannot be executed because it has not been set up properly."));
          }
          // Remove the completion check record.
          TestBase::deleteAssert($completion_check_id);
        }
      }
    }
759
    TestBundle::$currentTest = NULL;
760 761 762 763 764
    // Clear out the error messages and restore error handler.
    drupal_get_messages();
    restore_error_handler();
  }

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  /**
   * Generates a database prefix for running tests.
   *
   * The database prefix is used by prepareEnvironment() to setup a public files
   * directory for the test to be run, which also contains the PHP error log,
   * which is written to in case of a fatal error. Since that directory is based
   * on the database prefix, all tests (even unit tests) need to have one, in
   * order to access and read the error log.
   *
   * @see TestBase::prepareEnvironment()
   *
   * 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 WebTestBase::curlInitialize()
   * @see drupal_valid_test_ua()
   * @see WebTestBase::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 WebTestBase::setUp()
   */
  protected function changeDatabasePrefix() {
    if (empty($this->databasePrefix)) {
      $this->prepareDatabasePrefix();
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      // 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;
      }
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    }

    // 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']);
824

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    // Additionally override global $databases, since the installer does not use
    // the Database connection info.
    // @see install_verify_database_settings()
    // @see install_database_errors()
    // @todo Fix installer to use Database connection info.
    global $databases;
    $databases['default']['default'] = $connection_info['default'];

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

  /**
   * 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 TestBase::tearDown().
   *
   * Also sets up new resources for the testing environment, such as the public
   * filesystem and configuration directories.
   *
   * @see TestBase::tearDown()
   */
  protected function prepareEnvironment() {
850
    global $user, $conf;
851
    $language_interface = language(Language::TYPE_INTERFACE);
852

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    // When running the test runner within a test, back up the original database
    // prefix and re-set the new/nested prefix in drupal_valid_test_ua().
    if (drupal_valid_test_ua()) {
      $this->originalPrefix = drupal_valid_test_ua();
      drupal_valid_test_ua($this->databasePrefix);
    }

860
    // Backup current in-memory configuration.
861
    $this->originalSettings = settings()->getAll();
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    $this->originalConf = $conf;

    // Backup statics and globals.
    $this->originalContainer = clone drupal_container();
    $this->originalLanguage = $language_interface;
867
    $this->originalConfigDirectories = $GLOBALS['config_directories'];
868 869 870
    if (isset($GLOBALS['theme_key'])) {
      $this->originalThemeKey = $GLOBALS['theme_key'];
    }
871
    $this->originalTheme = isset($GLOBALS['theme']) ? $GLOBALS['theme'] : NULL;
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    // Save further contextual information.
    $this->originalFileDirectory = variable_get('file_public_path', conf_path() . '/files');
    $this->originalProfile = drupal_get_profile();
876
    $this->originalUser = isset($user) ? clone $user : NULL;
877 878 879

    // Ensure that the current session is not changed by the new environment.
    drupal_save_session(FALSE);
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    // Run all tests as a anonymous user by default, web tests will replace that
    // during the test set up.
    $user = drupal_anonymous_user();
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    // 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';
898
    $this->translation_files_directory = $this->public_files_directory . '/translations';
899 900 901 902 903

    // 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($this->temp_files_directory, FILE_CREATE_DIRECTORY);
904
    file_prepare_directory($this->translation_files_directory, FILE_CREATE_DIRECTORY);
905 906
    $this->generatedTestFiles = FALSE;

907 908
    // Create and set new configuration directories.
    $this->prepareConfigDirectories();
909

910 911 912 913 914
    // Reset statics before the old container is replaced so that objects with a
    // __destruct() method still have access to it.
    // @todo: Remove once they have been converted to services.
    drupal_static_reset();

915
    // Reset and create a new service container.
916
    $this->container = new ContainerBuilder();
917 918 919
     // @todo Remove this once this class has no calls to t() and format_plural()
    $this->container->register('string_translation', 'Drupal\Core\StringTranslation\TranslationManager');

920
    \Drupal::setContainer($this->container);
921

922 923 924 925
    // Unset globals.
    unset($GLOBALS['theme_key']);
    unset($GLOBALS['theme']);

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    // 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;
934 935 936

    // Indicate the environment was set up correctly.
    $this->setupEnvironment = TRUE;
937 938
  }

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  /**
   * Create and set new configuration directories.
   *
   * The child site uses drupal_valid_test_ua() to adjust the config directory
   * paths to a test-prefix-specific directory within the public files
   * directory.
   *
   * @see config_get_config_directory()
   */
  protected function prepareConfigDirectories() {
    $GLOBALS['config_directories'] = array();
    $this->configDirectories = array();
    include_once DRUPAL_ROOT . '/core/includes/install.inc';
    foreach (array(CONFIG_ACTIVE_DIRECTORY, CONFIG_STAGING_DIRECTORY) as $type) {
      // Assign the relative path to the global variable.
      $path = 'simpletest/' . substr($this->databasePrefix, 10) . '/config_' . $type;
      $GLOBALS['config_directories'][$type]['path'] = $path;
      // Ensure the directory can be created and is writeable.
      if (!install_ensure_config_directory($type)) {
        return FALSE;
      }
      // Provide the already resolved path for tests.
      $this->configDirectories[$type] = $this->originalFileDirectory . '/' . $path;
    }
  }

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  /**
   * Rebuild drupal_container().
   *
968 969 970 971 972
   * Use this to build a new kernel and service container. For example, when the
   * list of enabled modules is changed via the internal browser, in which case
   * the test process still contains an old kernel and service container with an
   * old module list.
   *
973 974 975 976
   * @todo Fix http://drupal.org/node/1708692 so that module enable/disable
   *   changes are immediately reflected in drupal_container(). Until then,
   *   tests can invoke this workaround when requiring services from newly
   *   enabled modules to be immediately available in the same request.
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   *
   * @see TestBase::prepareEnvironment()
   * @see TestBase::tearDown()
980 981
   */
  protected function rebuildContainer() {
982
    $this->kernel = new DrupalKernel('testing', FALSE, drupal_classloader(), FALSE);
983
    $this->kernel->boot();
984 985
    // DrupalKernel replaces the container in drupal_container() with a
    // different object, so we need to replace the instance on this test class.
986 987 988
    $this->container = drupal_container();
  }

989 990 991 992 993 994 995 996 997 998
  /**
   * Deletes created files, database tables, and reverts all environment changes.
   *
   * This method needs to be invoked for both unit and integration tests.
   *
   * @see TestBase::prepareDatabasePrefix()
   * @see TestBase::changeDatabasePrefix()
   * @see TestBase::prepareEnvironment()
   */
  protected function tearDown() {
999
    global $user, $conf;
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    // Reset all static variables.
    // Unsetting static variables will potentially invoke destruct methods,
    // which might call into functions that prime statics and caches again.
    // In that case, all functions are still operating on the test environment,
    // which means they may need to access its filesystem and database.
    drupal_static_reset();

    // Ensure that TestBase::changeDatabasePrefix() has run and TestBase::$setup
    // was not tricked into TRUE, since the following code would delete the
    // entire parent site otherwise.
    if ($this->setupDatabasePrefix) {
      // Remove all prefixed tables.
      $connection_info = Database::getConnectionInfo('default');
      $tables = db_find_tables($connection_info['default']['prefix']['default'] . '%');
      $prefix_length = strlen($connection_info['default']['prefix']['default']);
      foreach ($tables as $table) {
        if (db_drop_table(substr($table, $prefix_length))) {
          unset($tables[$table]);
        }
      }
      if (!empty($tables)) {
        $this->fail('Failed to drop all prefixed tables.');
      }
    }
1025 1026 1027 1028

    // 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);
1029
    if (($container = drupal_container()) && $container->has('keyvalue')) {
1030
      $captured_emails = \Drupal::state()->get('system.test_email_collector') ?: array();
1031 1032 1033 1034 1035
      $emailCount = count($captured_emails);
      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'));
      }
1036 1037 1038
    }

    // Delete temporary files directory.
1039
    file_unmanaged_delete_recursive($this->originalFileDirectory . '/simpletest/' . substr($this->databasePrefix, 10), array($this, 'filePreDeleteCallback'));
1040 1041 1042 1043

    // Restore original database connection.
    Database::removeConnection('default');
    Database::renameConnection('simpletest_original_default', 'default');
1044 1045 1046 1047
    // @see TestBase::changeDatabasePrefix()
    global $databases;
    $connection_info = Database::getConnectionInfo('default');
    $databases['default']['default'] = $connection_info['default'];
1048

1049
    // Restore original globals.
1050 1051 1052
    if (isset($this->originalThemeKey)) {
      $GLOBALS['theme_key'] = $this->originalThemeKey;
    }
1053 1054
    $GLOBALS['theme'] = $this->originalTheme;

1055
    // Reset all static variables.
1056 1057
    // All destructors of statically cached objects have been invoked above;
    // this second reset is guranteed to reset everything to nothing.
1058 1059 1060 1061
    drupal_static_reset();

    // Restore original in-memory configuration.
    $conf = $this->originalConf;
1062
    new Settings($this->originalSettings);
1063 1064

    // Restore original statics and globals.
1065
    \Drupal::setContainer($this->originalContainer);
1066
    $GLOBALS['config_directories'] = $this->originalConfigDirectories;
1067 1068 1069
    if (isset($this->originalPrefix)) {
      drupal_valid_test_ua($this->originalPrefix);
    }
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079

    // Restore original shutdown callbacks.
    $callbacks = &drupal_register_shutdown_function();
    $callbacks = $this->originalShutdownCallbacks;

    // Restore original user session.
    $user = $this->originalUser;
    drupal_save_session(TRUE);
  }

1080 1081 1082 1083 1084 1085 1086 1087
  /**
   * 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()) {
1088
      require_once DRUPAL_ROOT . '/core/includes/errors.inc';
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
      $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',
      );

      $backtrace = debug_backtrace();
1102 1103 1104 1105 1106 1107 1108 1109

      // Add verbose backtrace for errors, but not for debug() messages.
      if ($severity !== E_USER_NOTICE) {
        $verbose_backtrace = $backtrace;
        array_shift($verbose_backtrace);
        $message .= '<pre class="backtrace">' . format_backtrace($verbose_backtrace) . '</pre>';
      }

1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
      $this->error($message, $error_map[$severity], _drupal_get_last_caller($backtrace));
    }
    return TRUE;
  }

  /**
   * Handle exceptions.
   *
   * @see set_exception_handler
   */
  protected function exceptionHandler($exception) {
1121
    require_once DRUPAL_ROOT . '/core/includes/errors.inc';
1122
    $backtrace = $exception->getTrace();
1123
    $verbose_backtrace = $backtrace;
1124 1125 1126 1127 1128 1129
    // Push on top of the backtrace the call that generated the exception.
    array_unshift($backtrace, array(
      'line' => $exception->getLine(),
      'file' => $exception->getFile(),
    ));
    // The exception message is run through check_plain() by _drupal_decode_exception().
1130 1131 1132
    $decoded_exception = _drupal_decode_exception($exception);
    unset($decoded_exception['backtrace']);
    $message = format_string('%type: !message in %function (line %line of %file). <pre class="backtrace">!backtrace</pre>', $decoded_exception + array(
1133 1134 1135
      '!backtrace' => format_backtrace($verbose_backtrace),
    ));
    $this->error($message, 'Uncaught exception', _drupal_get_last_caller($backtrace));
1136 1137
  }

1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
  /**
   * Changes in memory settings.
   *
   * @param $name
   *   The name of the setting to return.
   * @param $value
   *   The value of the setting.
   *
   * @see \Drupal\Component\Utility\Settings::get()
   */
  protected function settingsSet($name, $value) {
    $settings = settings()->getAll();
    $settings[$name] = $value;
    new Settings($settings);
  }

1154 1155 1156
  /**
   * Generates a random string of ASCII characters of codes 32 to 126.
   *
1157 1158 1159 1160
   * The generated string includes alpha-numeric characters and common
   * miscellaneous characters. Use this method when testing general input
   * where the content is not restricted.
   *
1161 1162
   * 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
1163
   * Drupal\simpletest\TestBase::randomName().
1164 1165 1166
   *
   * @param $length
   *   Length of random string to generate.
1167
   *
1168 1169
   * @return
   *   Randomly generated string.
1170 1171
   *
   * @see Drupal\simpletest\TestBase::randomName()
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
   */
  public static function randomString($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.
   *
1190 1191 1192
   * Do not use this method when testing unvalidated user input. Instead, use
   * Drupal\simpletest\TestBase::randomString().
   *
1193 1194
   * @param $length
   *   Length of random string to generate.
1195
   *
1196 1197
   * @return
   *   Randomly generated string.
1198 1199
   *
   * @see Drupal\simpletest\TestBase::randomString()
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210
   */
  public static function randomName($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;
  }

1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
  /**
   * Generates a random PHP object.
   *
   * @param int $size
   *   The number of random keys to add to the object.
   *
   * @return \stdClass
   *   The generated object, with the specified number of random keys. Each key
   *   has a random string value.
   */
  public static function randomObject($size = 4) {
    $object = new \stdClass();
    for ($i = 0; $i < $size; $i++) {
      $random_key = self::randomName();
      $random_value = self::randomString();
      $object->{$random_key} = $random_value;
    }
    return $object;
  }

1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242
  /**
   * 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),
   * );
1243
   * $permutations = TestBase::generatePermutations($parameters);
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
   * // 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 $all_permutations;
  }
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  /**
   * Ensures test files are deletable within file_unmanaged_delete_recursive().
   *
   * Some tests chmod generated files to be read only. During tearDown() and
   * other cleanup operations, these files need to get deleted too.
   */
  public static function filePreDeleteCallback($path) {
    chmod($path, 0700);
  }
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  /**
   * Returns a ConfigImporter object to import test importing of configuration.
   *
   * @return \Drupal\Core\Config\ConfigImporter
   *   The ConfigImporter object.
   */
  public function configImporter() {
    if (!$this->configImporter) {
      // Set up the ConfigImporter object for testing.
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      $config_comparer = new StorageComparer(
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        $this->container->get('config.storage.staging'),
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        $this->container->get('config.storage')
      );
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      $this->configImporter = new ConfigImporter(
        $config_comparer,
        $this->container->get('event_dispatcher'),
        $this->container->get('config.factory'),
        $this->container->get('plugin.manager.entity'),
        $this->container->get('lock')
      );
    }
    // Always recalculate the changelist when called.
    return $this->configImporter->reset();
  }
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  /**
   * Copies configuration objects from source storage to target storage.
   *
   * @param \Drupal\Core\Config\StorageInterface $source_storage
   *   The source config storage service.
   * @param \Drupal\Core\Config\StorageInterface $target_storage
   *   The target config storage service.
   */
  public function copyConfig(StorageInterface $source_storage, StorageInterface $target_storage) {
    $target_storage->deleteAll();
    foreach ($source_storage->listAll() as $name) {
      $target_storage->write($name, $source_storage->read($name));
    }
  }
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}