appendToFile example

public function testAppendToFile()
    {
        $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'bar.txt';

        // skip mode check on Windows         if ('\\' !== \DIRECTORY_SEPARATOR) {
            $oldMask = umask(0002);
        }

        $this->filesystem->dumpFile($filename, 'foo');

        $this->filesystem->appendToFile($filename, 'bar');

        $this->assertFileExists($filename);
        $this->assertStringEqualsFile($filename, 'foobar');

        // skip mode check on Windows         if ('\\' !== \DIRECTORY_SEPARATOR) {
            $this->assertFilePermissions(664, $filename);
            umask($oldMask);
        }
    }

    

// Make sure there is an entry in sites.php for the new site.     $fs = new Filesystem();
    if (!$fs->exists($root . '/sites/sites.php')) {
      $fs->copy($root . '/sites/example.sites.php', $root . '/sites/sites.php');
    }
    $parsed = parse_url($base_url);
    $port = $parsed['port'] ?? 80;
    $host = $parsed['host'] ?? 'localhost';
    // Remove 'sites/' from the beginning of the path.     $site_path = substr($this->siteDirectory, 6);
    $fs->appendToFile($root . '/sites/sites.php', "\$sites['$port.$host'] = '$site_path';");

    $user_agent = drupal_generate_test_ua($this->databasePrefix);
    if ($input->getOption('json')) {
      $output->writeln(json_encode([
        'db_prefix' => $this->databasePrefix,
        'user_agent' => $user_agent,
        'site_path' => $this->siteDirectory,
      ]));
    }
    else {
      $output->writeln('<info>Successfully installed a test site</info>');