@Test
public void testFloodArp() {

	Ipv4Address srcIpv4Address = Ipv4Address.getDefaultInstance("192.168.10.1");
	Ipv4Address dstIpv4Address = Ipv4Address.getDefaultInstance("192.168.20.1");
	MacAddress macAddress = new MacAddress("aa:bb:cc:dd:ee:ff");
	ArpMessageAddress senderAddress = new ArpMessageAddress(macAddress, srcIpv4Address);
	InstanceIdentifier<Node> instanceId = InstanceIdentifier.builder(Nodes.class)
			.child(Node.class, new NodeKey(new NodeId("node_001"))).toInstance();
	Future<RpcResult<Void>> futureTransmitPacketResult = mock(Future.class);
	when(packetProcessingService.transmitPacket(any(TransmitPacketInput.class)))
			.thenReturn(futureTransmitPacketResult);
	arpSender.floodArp(senderAddress, dstIpv4Address, instanceId);
	verify(packetProcessingService, times(1)).transmitPacket(any(TransmitPacketInput.class));
}