Tester\Runner\Runner::findTests PHP Method

    private function findTests($path)
    {
        if (strpbrk($path, '*?') === FALSE && !file_exists($path)) {
            throw new \InvalidArgumentException("File or directory '{$path}' not found.");
        }
        if (is_dir($path)) {
            foreach (glob(str_replace('[', '[[]', $path) . '/*', GLOB_ONLYDIR) ?: [] as $dir) {
                $this->findTests($dir);
            }
            $path .= '/*.' . self::TEST_FILE_EXTENSION;
        }
        foreach (glob(str_replace('[', '[[]', $path)) ?: [] as $file) {
            if (is_file($file)) {
                $this->testHandler->initiate(realpath($file));
            }
        }
    }