@Test
public void addDuplicate() throws Exception {

    ZipArchive archive = new ZipArchive(new File("target/test.zip"));
    archive.addToArchive(new File("src/test/resources/vdb-file.txt"), "vdb-file.txt");
    archive.addToArchive(new File("src/test/resources/vdb-file.txt"), "vdb-file.txt");
}