class InstallerExistingConfigTestBase

abstract class InstallerExistingConfigTestBase extends InstallerTestBase {
    
    /**
     * This is set by the profile in the core.extension extracted.
     */
    protected $profile = NULL;
    
    /**
     * @todo
     */
    protected $existingSyncDirectory = FALSE;
    
    /**
     * {@inheritdoc}
     */
    protected function prepareEnvironment() {
        parent::prepareEnvironment();
        $archiver = new ArchiveTar($this->getConfigTarball(), 'gz');
        if ($this->profile === NULL) {
            $core_extension = Yaml::decode($archiver->extractInString('core.extension.yml'));
            $this->profile = $core_extension['profile'];
        }
        // Create a profile for testing. We set core_version_requirement to '*' for
        // the test so that it does not need to be updated between major versions.
        $info = [
            'type' => 'profile',
            'core_version_requirement' => '*',
            'name' => 'Configuration installation test profile (' . $this->profile . ')',
        ];
        // File API functions are not available yet.
        $path = $this->siteDirectory . '/profiles/' . $this->profile;
        if ($this->existingSyncDirectory) {
            $config_sync_directory = $this->siteDirectory . '/config/sync';
            $this->settings['settings']['config_sync_directory'] = (object) [
                'value' => $config_sync_directory,
                'required' => TRUE,
            ];
        }
        else {
            // Put the sync directory inside the profile.
            $config_sync_directory = $path . '/config/sync';
        }
        mkdir($path, 0777, TRUE);
        file_put_contents("{$path}/{$this->profile}.info.yml", Yaml::encode($info));
        // Create config/sync directory and extract tarball contents to it.
        mkdir($config_sync_directory, 0777, TRUE);
        $files = [];
        $list = $archiver->listContent();
        if (is_array($list)) {
            
            /** @var array $list */
            foreach ($list as $file) {
                $files[] = $file['filename'];
            }
            $archiver->extractList($files, $config_sync_directory);
        }
        // Add the module that is providing the database driver to the list of
        // modules that can not be uninstalled in the core.extension configuration.
        if (file_exists($config_sync_directory . '/core.extension.yml')) {
            $core_extension = Yaml::decode(file_get_contents($config_sync_directory . '/core.extension.yml'));
            $module = Database::getConnection()->getProvider();
            if ($module !== 'core') {
                $core_extension['module'][$module] = 0;
                $core_extension['module'] = module_config_sort($core_extension['module']);
                file_put_contents($config_sync_directory . '/core.extension.yml', Yaml::encode($core_extension));
            }
        }
    }
    
    /**
     * Gets the filepath to the configuration tarball.
     *
     * The tarball will be extracted to the install profile's config/sync
     * directory for testing.
     *
     * @return string
     *   The filepath to the configuration tarball.
     */
    protected abstract function getConfigTarball();
    
    /**
     * {@inheritdoc}
     */
    protected function installParameters() {
        $parameters = parent::installParameters();
        // The options that change configuration are disabled when installing from
        // existing configuration.
        unset($parameters['forms']['install_configure_form']['site_name']);
        unset($parameters['forms']['install_configure_form']['site_mail']);
        unset($parameters['forms']['install_configure_form']['enable_update_status_module']);
        unset($parameters['forms']['install_configure_form']['enable_update_status_emails']);
        return $parameters;
    }
    
    /**
     * Confirms that the installation installed the configuration correctly.
     */
    public function testConfigSync() {
        // After installation there is no snapshot and nothing to import.
        $change_list = $this->configImporter()
            ->getStorageComparer()
            ->getChangelist();
        $expected = [
            'create' => [],
            // The system.mail is changed configuration because the test system
            // changes it to ensure that mails are not sent.
'update' => [
                'system.mail',
            ],
            'delete' => [],
            'rename' => [],
        ];
        $this->assertEquals($expected, $change_list);
    }
    
    /**
     * Installer step: Select installation profile.
     */
    protected function setUpProfile() {
        if ($this->existingSyncDirectory) {
            $edit = [
                'profile' => SelectProfileForm::CONFIG_INSTALL_PROFILE_KEY,
            ];
            $this->submitForm($edit, $this->translations['Save and continue']);
        }
        else {
            parent::setUpProfile();
        }
    }

}