def test_system_state(self):
"""
Test module SystemState. Add and remove packets from server and queue and check for correct behavior.
"""
s = SystemState(DESTestExtended.sim)
# check correct initialization
self.assertEqual([s.buffer.get_queue_length(), s.server_busy], [0, False],
msg="Error in SystemState. Wrong int indicates queue length, wrong bool server busy.")
# check correct behavior of start_service() after init
self.assertEqual(s.start_service(), False,
msg="Error in SystemState. Wrong value indicates wrong queue length.")
# check correct adding of packets to server or queue
self.assertEqual(s.add_packet_to_server(), True,
msg="Error in SystemState. Could not add packet to server though it should be idle.")
self.assertEqual(s.add_packet_to_server(), False,
msg="Error in SystemState. Server not busy, though it should be.")
self.assertEqual([s.buffer.get_queue_length(), s.server_busy], [0, True],
msg="Error in SystemState. Wrong int indicates queue length, wrong bool server busy.")
self.assertEqual(s.add_packet_to_queue(), True,
msg="Error in SystemState. Server not busy, though busy though it shouldn't be.")
self.assertEqual([s.buffer.get_queue_length(), s.server_busy], [1, True],
msg="Error in SystemState. Wrong int indicates queue length, wrong bool server busy.")
self.assertEqual(s.add_packet_to_server(), False,
msg="Error in SystemState. Should not be able to add packet to server.")
for _ in range(DESTestExtended.sim.sim_param.S - 1):
self.assertEqual(s.add_packet_to_queue(), True,
msg="Error in SystemState. Could not add packet to queue.")
# check correct dropping of packets, when queue is full
self.assertEqual(s.add_packet_to_queue(), False,
msg="Error in SystemState. Could add packet to queue though it should be full.")
self.assertEqual([s.buffer.get_queue_length(), s.server_busy], [DESTestExtended.sim.sim_param.S, True],
msg="Error in SystemState. Wrong int indicates queue length, wrong bool server busy.")
# check behavior of function complete_service()
s.complete_service()
self.assertEqual([s.buffer.get_queue_length(), s.server_busy], [DESTestExtended.sim.sim_param.S, False],
msg="Error in SystemState. Wrong int indicates queue length, wrong bool server busy.")
# check behavior of function start_service()
self.assertEqual(s.start_service(), True,
msg="Error in SystemState. Starting service should be possible at this point.")
self.assertEqual([s.buffer.get_queue_length(), s.server_busy], [DESTestExtended.sim.sim_param.S - 1, True],
msg="Error in SystemState. Wrong int indicates queue length, wrong bool server busy.")
def test_finite_queue(self):
"""
Test the basic behavior of the finite queue.
"""
DESTestExtended.sim.reset()
s = SystemState(DESTestExtended.sim)
self.assertEqual(s.get_queue_length(),
0,
msg="Error in FiniteQueue. Wrong queue length.")
s.add_packet_to_queue()
DESTestExtended.sim.sim_state.now = 5
s.add_packet_to_queue()
DESTestExtended.sim.sim_state.now = 10
s.add_packet_to_queue()
self.assertEqual(s.get_queue_length(),
3,
msg="Error in FiniteQueue. Wrong queue length.")
s.server_busy = False
s.start_service()
self.assertEqual(s.server_busy,
True,
msg="Error in FiniteQueue. Server should be busy.")
self.assertEqual(
s.served_packet.t_arrival,
0,
msg="Error in FiniteQueue. Arrival time of packet wrong.")
self.assertEqual(s.get_queue_length(),
2,
msg="Error in FiniteQueue. Wrong queue length.")
s.server_busy = False
s.start_service()
self.assertEqual(s.server_busy,
True,
msg="Error in FiniteQueue. Server should be busy.")
self.assertEqual(
s.served_packet.t_arrival,
5,
msg="Error in FiniteQueue. Arrival time of packet wrong.")
self.assertEqual(s.get_queue_length(),
1,
msg="Error in FiniteQueue. Wrong queue length.")
s.server_busy = False
s.start_service()
self.assertEqual(s.server_busy,
True,
msg="Error in FiniteQueue. Server should be busy.")
self.assertEqual(
s.served_packet.t_arrival,
10,
msg="Error in FiniteQueue. Arrival time of packet wrong.")
self.assertEqual(s.get_queue_length(),
0,
msg="Error in FiniteQueue. Wrong queue length.")
