static File file;

    @BeforeAll
    static void setUp() throws IOException {

        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(file=File.createTempFile("tempDir",".zip")));

        ZipEntry e = new ZipEntry("emptyFile.txt");
        out.putNextEntry(e);
        out.closeEntry();

        e = new ZipEntry("oneLineFile.txt");
        out.putNextEntry(e);

        StringBuilder sb;
        byte[] data;
        sb = new StringBuilder();
        sb.append("route_id,agency_id,route_short_name,route_long_name,route_type");
        data = sb.toString().getBytes();
        out.write(data, 0, data.length);

        out.closeEntry();

        out.close();
    }

    @AfterAll
    static void set(){

        file.delete(); // return false

    }