@Test
public void testReadB4() throws IOException, IllegalCeosFormatException {

    final String prefix = "ß3534aß0uawemqw34mfavsdpvhaweföldv:";
    final String suffix = "lfjldfkjvg45";
    _ios.writeBytes(prefix);
    _ios.writeInt(7100);
    _ios.writeBytes(suffix);
    final CeosFileReader ceosReader = new CeosFileReader(_ios);
    ceosReader.seek(prefix.length());
    assertEquals(7100, ceosReader.readB4());
}