wp_mail(): Send Helper

• Static method in TestCase "sends" the mail

abstract class TestCase extends PHPUnit_Framework_TestCase {
    public static function mail_to_file($to, $subject, $message) {
        if (!self::$mail_file_basename) {
            throw new Exception('wp_mail() called at unexpected time'
                    . ' (mail_file_basename was not set).');
        }

        if (!self::$temp_dir) {
            self::$temp_dir = sys_get_temp_dir();
        }

        // Keep Windows happy by replacing :: in method names with --.
        $basename = str_replace('::', '--', self::$mail_file_basename);
        self::$mail_file = self::$temp_dir . '/' . $basename;

        $contents = 'To: ' . implode(', ', (array) $to) . "\n"
                . "Subject: $subject\n\n$message";

        return file_put_contents(self::$mail_file, $contents, FILE_APPEND);
    }
}