src/test/lwes/util/NumberCodecTest.java

   1 package org.lwes.util;
   2
   3 import static org.junit.Assert.assertEquals;
   4 import static org.junit.Assert.assertNotNull;
   5 import org.junit.Test;
   6
   7 import java.math.BigInteger;
   8
   9 /**
  10  * @author fmaritato
  11  */
  12
  13 public class NumberCodecTest {
  14
  15     @Test
  16     public void testToHexString() {
  17         String s = NumberCodec.toHexString((byte) 1);
  18         assertNotNull(s);
  19         assertEquals("Byte to hex incorrect", "01", s);
  20
  21         s = NumberCodec.toHexString((short) 1);
  22         assertNotNull(s);
  23         assertEquals("Short to hex incorrect", "0001", s);
  24
  25         s = NumberCodec.toHexString(1);
  26         assertNotNull(s);
  27         assertEquals("Int to hex incorrect", "00000001", s);
  28
  29         s = NumberCodec.toHexString((long) 1);
  30         assertNotNull(s);
  31         assertEquals("Long to hex incorrect", "0000000000000001", s);
  32
  33         s = NumberCodec.toHexString(new BigInteger("1000"));
  34         assertNotNull(s);
  35         assertEquals("BigInteger to hex incorrect", "3e8", s);
  36     }
  37
  38     @Test
  39     public void testWriteHexStringToBuffer() {
  40         StringBuffer buf = new StringBuffer(16);
  41
  42         NumberCodec.writeHexString((byte) 1, buf);
  43         assertEquals("01", buf.toString());
  44         buf.delete(0, buf.length());
  45
  46         NumberCodec.writeHexString((short) 1, buf);
  47         assertEquals("0001", buf.toString());
  48         buf.delete(0, buf.length());
  49
  50         NumberCodec.writeHexString(1, buf);
  51         assertEquals("00000001", buf.toString());
  52         buf.delete(0, buf.length());
  53
  54         NumberCodec.writeHexString((long) 1, buf);
  55         assertEquals("0000000000000001", buf.toString());
  56         buf.delete(0, buf.length());
  57     }
  58
  59     @Test
  60     public void testByteArrayToHexString() {
  61         byte[] buf = NumberCodec.hexStringToByteArray("011e");
  62         String hex1 = NumberCodec.byteArrayToHexString(buf);
  63         assertEquals("byteArrayToHexString failed", "011e", hex1);
  64         String hex2 = NumberCodec.byteArrayToHexString(buf, 0, buf.length);
  65         assertEquals("byteArrayToHexString failed", "011e", hex2);
  66
  67         byte b = NumberCodec.byteFromHexString("0a");
  68         assertEquals("byteFromHexString fail", 10, b);
  69     }
  70
  71     @Test
  72     public void testEncodeDecode() {
  73
  74         // encodeLong and decodeLong call the unchecked versions underneath.
  75         byte[] buf = new byte[64];
  76         NumberCodec.encodeLong(123l, buf, 0, buf.length);
  77         long lval = NumberCodec.decodeLong(buf, 0, buf.length);
  78         assertEquals("encode/decode long unchecked fail", 123l, lval);
  79
  80         NumberCodec.encodeInt(123, buf, 0, buf.length);
  81         int ival = NumberCodec.decodeInt(buf, 0, buf.length);
  82         assertEquals("encode/decode int unchecked fail", 123, ival);
  83
  84         NumberCodec.encodeShort((short) 12, buf, 0, buf.length);
  85         short sval = NumberCodec.decodeShort(buf, 0, buf.length);
  86         assertEquals("encode/decode short unchecked fail", 12, sval);
  87
  88     }
  89 }