code: protected function writeProgress(string $progress): void
      {
          $this->numTestsRun++;
  
          if ($this->hasReplacementSymbol($progress)) {
              $progress = static::$symbols[$progress];
          }
  
          $padding = str_pad($this->numTestsRun, strlen($this->numTests), ' ', STR_PAD_LEFT);
  
          $this->write("({$padding}/{$this->numTests}) {$progress} {$this->testRow}".PHP_EOL);
      }
docs: {@inheritdoc}