byte[] origBuf = new byte[length];
getRandom().nextBytes(origBuf);
byte[] targetBuf = Arrays.copyOf(origBuf, origBuf.length);
// bulk-read 0 bytes: must not modify buffer
si.readBytes(targetBuf, 0, 0);
assertEquals(origBuf[0], targetBuf[0]);
si.reset();
// read a few few bytes as ints
int bytesToRead = randomIntBetween(1, length / 2);