@Test
public void testConstructor() {

	assertEquals(0, empty.getData());
	assertEquals("{\"data\":0}", empty.toString());
	assertEquals(1, empty.toJsonObject().size());
	assertEquals(
			0,
			Primitive.toUInt32(empty.toJsonObject().getInt(
					UInt32.FIELD_DATA)));
	assertEquals(UInt32.TYPE, empty.getMessageType());
}