@Test
public void testSignExtend2() {
DataWord x = new DataWord(Hex.decode("f2"));
byte k = 1;
String expected = "00000000000000000000000000000000000000000000000000000000000000f2";
x.signExtend(k);
System.out.println(x.toString());
assertEquals(expected, x.toString());
}
@Test
public void testSignExtend7() {
byte k = 3;
DataWord x = new DataWord(Hex.decode("ab82345678"));
String expected = "ffffffffffffffffffffffffffffffffffffffffffffffffffffffff82345678";
x.signExtend(k);
System.out.println(x.toString());
assertEquals(expected, x.toString());
}