assertTrue(packet.hasHeader(IEEE802dot1q.ID, 0));
assertTrue(packet.hasHeader(Ip4.ID));
assertTrue(packet.hasHeader(icmp));
assertTrue(icmp.hasSubHeader(echo));
assertEquals(8, icmp.type());
assertEquals(0, icmp.code());
assertEquals(0x10FD, icmp.checksum());
assertEquals(0xd001, echo.id());
assertEquals(0x811e, echo.sequence());