assert detailsFromJdk7Walker != null &&
                millisToSeconds(details.lastModified) == millisToSeconds(detailsFromJdk7Walker.lastModified) &&
                details.directory == detailsFromJdk7Walker.directory &&
                (details.directory || details.size == detailsFromJdk7Walker.size)
        }
    }

    private static long millisToSeconds(long millis) {
        millis / 1000L
    }