}

    private void assertTar(final String extension, final FileInputStreamWrapper wrapper, boolean preserveFileTimestamps)
        throws IOException {
        try (TarArchiveInputStream tar = new TarArchiveInputStream(wrapper.apply(new FileInputStream(getOutputFile(extension))))) {
            TarArchiveEntry entry = tar.getNextTarEntry();
            boolean realFolderEntry = false;
            boolean fileEntry = false;

        file("producer-tar/build/distributions/elasticsearch.tar.gz").exists() == false
    }

    private static boolean assertTarPermissionDefaults(File tarArchive) {
        TarArchiveInputStream tarInput = new TarArchiveInputStream(new GzipCompressorInputStream(new FileInputStream(tarArchive)))
        try {
            TarArchiveEntry currentEntry = tarInput.getNextTarEntry()
            while (currentEntry != null) {