bris.read(); assertEquals("Read 1 byte, available must return filelength - 1", 65534, bris.available()); bris.read(); assertEquals("Read another 1 byte, available must return filelength - 2", 65533, bris.available()); bris.read(); assertEquals("Seek to offset 100 and read 1 byte, available should return filelength - 101", 65434, bris.available());