@Test
public void testConstructor() {

	assertEquals(0L, empty.getData());
	assertEquals("{\"data\":0}", empty.toString());
	assertEquals(1, empty.toJsonObject().size());
	assertEquals(
			0L,
			Primitive.toUInt64(empty.toJsonObject()
					.getJsonNumber(UInt64.FIELD_DATA).bigIntegerValue()));
	assertEquals(UInt64.TYPE, empty.getMessageType());
}