@Test
 public void testRead() throws IOException {

     File file = new File(dir, "read.dat");
     file.delete();
     DataOutputStream out = new DataOutputStream(new FileOutputStream(file));
     out.writeByte(0x23);
     out.writeShort(0x1234);
     out.writeInt(0x12345678);
     out.writeLong(0x1234567898765432L);
     // total 1 + 2 + 4 + 8 = 15 bytes
     // put a short across a buffer boundary
     for (int i = 0; i < 8192 - 15 - 1; i++) out.write(0);
     out.writeShort(0x4321);
     // put an int across the next buffer boundary
     for (int i = 0; i < 8192 - 1 - 3; i++) out.write(0);
     out.writeInt(0x1a2b3c4d);
     // put a long across the next buffer boundary
     for (int i = 0; i < 8192 - 1 - 7; i++) out.write(0);
     out.writeLong(0x1122334455667788L);
     // now write several buffers worth of data
     for (int i = 0; i < 8192 * 3; i++) out.writeByte(i);
     out.close();
     FileInputStream ins = new FileInputStream(file);
     ChannelInput in = new ChannelInput(ins.getChannel(), 0, 8192);
     assertEquals((byte)0x23, in.readByte());
     assertEquals((short)0x1234, in.readShort());
     assertEquals(0x12345678, in.readInt());
     assertEquals(0x1234567898765432L, in.readLong());
     in.skip(8192 - 15 - 1);
     assertEquals((short)0x4321, in.readShort());
     in.skip(8192 - 1 - 3);
     assertEquals(0x1a2b3c4d, in.readInt());
     in.skip(8192 - 1 - 7);
     assertEquals(0x1122334455667788L, in.readLong());
     byte[] data = new byte[8192 * 3];
     in.read(data, 0, data.length);
     for (int i = 0; i < data.length; i++) {
         assertEquals((byte)i, data[i]);
     }
     ins.close();
}