@Test
public void testHashCode() {

  byte[] data1a = "hello world".getBytes();
  byte[] data1b = new String("hello world").getBytes();
  byte[] data2 = "hello another world".getBytes();
  ByteArrayHolder rawText1a = new ByteArrayHolder(data1a);
  ByteArrayHolder rawText1b = new ByteArrayHolder(data1b);
  Assert.assertEquals(rawText1a.hashCode(), rawText1b.hashCode());
  ByteArrayHolder rawText2 = new ByteArrayHolder(data2);
  Assert.assertNotEquals(rawText1a.hashCode(), rawText2.hashCode());
  ByteArrayHolder rawText3 = new ByteArrayHolder(null);
  Assert.assertNotEquals(rawText1a.hashCode(), rawText3.hashCode());
  Assert.assertNotEquals(rawText2.hashCode(), rawText3.hashCode());
}