mageekguy\atoum\scripts\runner::setDefaultBootstrapFiles PHP Method

    public function setDefaultBootstrapFiles($startDirectory = null)
    {
        foreach (self::getSubDirectoryPath($startDirectory ?: $this->getDirectory()) as $directory) {
            $defaultBootstrapFile = $directory . static::defaultBootstrapFile;
            if ($this->adapter->is_file($defaultBootstrapFile) === true) {
                $this->setBootstrapFile($defaultBootstrapFile);
                break;
            }
        }
        return $this;
    }