public void testReadWriteFromNonZeroOffset() throws Exception {
    HWPFFileSystem fileSys = new HWPFFileSystem();
    HWPFOutputStream tableOut = fileSys.getStream("1Table");

    tableOut.write(new byte[20]); // 20 bytes of whatever at the front.
    _styleSheet.writeTo(tableOut);

    byte[] newTableStream = tableOut.toByteArray();

    StyleSheet newStyleSheet = new StyleSheet(newTableStream, 20);
    assertEquals(newStyleSheet, _styleSheet);
  }
  public void testReadWrite() throws Exception {
    HWPFFileSystem fileSys = new HWPFFileSystem();

    HWPFOutputStream tableOut = fileSys.getStream("1Table");
    HWPFOutputStream mainOut = fileSys.getStream("WordDocument");

    _styleSheet.writeTo(tableOut);

    byte[] newTableStream = tableOut.toByteArray();

    StyleSheet newStyleSheet = new StyleSheet(newTableStream, 0);
    assertEquals(newStyleSheet, _styleSheet);
  }