@Test
public void testFromJsonString() {

	QuaternionStamped p = QuaternionStamped.fromJsonString(p1.toString());
	assertEquals(p1.toString(), p.toString());
	assertEquals(p1.toJsonObject(), p.toJsonObject());
	assertEquals(p1.getMessageType(), p.getMessageType());
	assertEquals(p1.getHeader(), p.getHeader());
	assertEquals(p1.getQuaternion(), p.getQuaternion());
	assertNotSame(p1, p);
	assertNotSame(p1.toString(), p.toString());
	assertNotSame(p1.toJsonObject(), p.toJsonObject());
}