class UpdatePathTestBase

abstract class UpdatePathTestBase extends BrowserTestBase {
    use UpdatePathTestTrait {
        runUpdates as doRunUpdates;
    }
    
    /**
     * Modules to enable after the database is loaded.
     */
    protected static $modules = [];
    
    /**
     * The file path(s) to the dumped database(s) to load into the child site.
     *
     * The file system/tests/fixtures/update/drupal-8.8.0.bare.standard.php.gz is
     * normally included first -- this sets up the base database from a bare
     * standard Drupal installation.
     *
     * The file system/tests/fixtures/update/drupal-8.8.0.filled.standard.php.gz
     * can also be used in case we want to test with a database filled with
     * content, and with all core modules enabled.
     *
     * @var array
     */
    protected $databaseDumpFiles = [];
    
    /**
     * Flag that indicates whether the child site has been updated.
     *
     * @var bool
     */
    protected $upgradedSite = FALSE;
    
    /**
     * Array of errors triggered during the update process.
     *
     * @var array
     */
    protected $upgradeErrors = [];
    
    /**
     * Array of modules loaded when the test starts.
     *
     * @var array
     */
    protected $loadedModules = [];
    
    /**
     * Flag to indicate whether zlib is installed or not.
     *
     * @var bool
     */
    protected $zlibInstalled = TRUE;
    
    /**
     * Flag to indicate whether there are pending updates or not.
     *
     * @var bool
     */
    protected $pendingUpdates = TRUE;
    
    /**
     * The update URL.
     *
     * @var string
     */
    protected $updateUrl;
    
    /**
     * Disable strict config schema checking.
     *
     * The schema is verified at the end of running the update.
     *
     * @var bool
     */
    protected $strictConfigSchema = FALSE;
    
    /**
     * Overrides BrowserTestBase::setUp() for update testing.
     *
     * The main difference in this method is that rather than performing the
     * installation via the installer, a database is loaded. Additional work is
     * then needed to set various things such as the config directories and the
     * container that would normally be done via the installer.
     */
    protected function setUp() {
        parent::setUpAppRoot();
        $this->zlibInstalled = function_exists('gzopen');
        $request = Request::createFromGlobals();
        // Boot up Drupal into a state where calling the database API is possible.
        // This is used to initialize the database system, so we can load the dump
        // files.
        $autoloader = (require $this->root . '/autoload.php');
        $kernel = TestRunnerKernel::createFromRequest($request, $autoloader);
        $kernel->loadLegacyIncludes();
        // Set the update url. This must be set here rather than in
        // self::__construct() or the old URL generator will leak additional test
        // sites. Additionally, we need to prevent the path alias processor from
        // running because we might not have a working alias system before running
        // the updates.
        $this->updateUrl = Url::fromRoute('system.db_update', [], [
            'path_processing' => FALSE,
        ]);
        $this->setupBaseUrl();
        // Install Drupal test site.
        $this->prepareEnvironment();
        $this->runDbTasks();
        // We are going to set a missing zlib requirement property for usage
        // during the performUpgrade() and tearDown() methods. Also set that the
        // tests failed.
        if (!$this->zlibInstalled) {
            parent::setUp();
            return;
        }
        $this->installDrupal();
        // Add the config directories to settings.php.
        $sync_directory = Settings::get('config_sync_directory');
        \Drupal::service('file_system')->prepareDirectory($sync_directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS);
        // Ensure the default temp directory exist and is writable. The configured
        // temp directory may be removed during update.
        \Drupal::service('file_system')->prepareDirectory($this->tempFilesDirectory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS);
        // Set the container. parent::rebuildAll() would normally do this, but this
        // not safe to do here, because the database has not been updated yet.
        $this->container = \Drupal::getContainer();
        $this->replaceUser1();
        require_once $this->root . '/core/includes/update.inc';
        // Setup Mink.
        $this->initMink();
        // Set up the browser test output file.
        $this->initBrowserOutputFile();
    }
    
    /**
     * {@inheritdoc}
     */
    public function installDrupal() {
        $this->initUserSession();
        $this->prepareSettings();
        $this->doInstall();
        $this->initSettings();
        $request = Request::createFromGlobals();
        $container = $this->initKernel($request);
        $this->initConfig($container);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function doInstall() {
        $this->runDbTasks();
        // Allow classes to set database dump files.
        $this->setDatabaseDumpFiles();
        // Load the database(s).
        foreach ($this->databaseDumpFiles as $file) {
            if (substr($file, -3) == '.gz') {
                $file = "compress.zlib://{$file}";
            }
            require $file;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function initFrontPage() {
        // Do nothing as Drupal is not installed yet.
    }
    
    /**
     * Set database dump files to be used.
     */
    protected abstract function setDatabaseDumpFiles();
    
    /**
     * Add settings that are missed since the installer isn't run.
     */
    protected function prepareSettings() {
        parent::prepareSettings();
        // Generate a hash salt.
        $settings['settings']['hash_salt'] = (object) [
            'value' => Crypt::randomBytesBase64(55),
            'required' => TRUE,
        ];
        // Since the installer isn't run, add the database settings here too.
        $settings['databases']['default'] = (object) [
            'value' => Database::getConnectionInfo(),
            'required' => TRUE,
        ];
        // Force every update hook to only run one entity per batch.
        $settings['entity_update_batch_size'] = (object) [
            'value' => 1,
            'required' => TRUE,
        ];
        // Set up sync directory.
        $settings['settings']['config_sync_directory'] = (object) [
            'value' => $this->publicFilesDirectory . '/config_sync',
            'required' => TRUE,
        ];
        $this->writeSettings($settings);
    }
    
    /**
     * Helper function to run pending database updates.
     */
    protected function runUpdates() {
        if (!$this->zlibInstalled) {
            $this->fail('Missing zlib requirement for update tests.');
            return FALSE;
        }
        $this->doRunUpdates($this->updateUrl);
    }
    
    /**
     * Runs the install database tasks for the driver used by the test runner.
     */
    protected function runDbTasks() {
        // Create a minimal container so that t() works.
        // @see install_begin_request()
        $container = new ContainerBuilder();
        $container->setParameter('language.default_values', Language::$defaultValues);
        $container->register('language.default', 'Drupal\\Core\\Language\\LanguageDefault')
            ->addArgument('%language.default_values%');
        $container->register('string_translation', 'Drupal\\Core\\StringTranslation\\TranslationManager')
            ->addArgument(new Reference('language.default'));
        \Drupal::setContainer($container);
        require_once __DIR__ . '/../../../../includes/install.inc';
        $connection_info = Database::getConnectionInfo();
        $driver = $connection_info['default']['driver'];
        $namespace = $connection_info['default']['namespace'] ?? NULL;
        $errors = db_installer_object($driver, $namespace)->runTasks();
        if (!empty($errors)) {
            $this->fail('Failed to run installer database tasks: ' . implode(', ', $errors));
        }
    }
    
    /**
     * Replace User 1 with the user created here.
     */
    protected function replaceUser1() {
        
        /** @var \Drupal\user\UserInterface $account */
        // @todo Saving the account before the update is problematic.
        //   https://www.drupal.org/node/2560237
        $account = User::load(1);
        $account->setPassword($this->rootUser->pass_raw);
        $account->setEmail($this->rootUser
            ->getEmail());
        $account->setUsername($this->rootUser
            ->getAccountName());
        $account->save();
    }

}