def test_allbad_network(self):
"""reliability over network with all of the above problems"""
# setup environment
run_command(netem_change.format("corrupt 1% duplicate 10% loss 10% 25% delay 20ms reorder 25% 50%"))
# launch localhost client connecting to server
client_socket.connect()
# client sends content to server
client_socket.send(input_file)
# because it takes a bit of time for the data to be send over, there needs to be a bit of a delay here
time.sleep(0.3)
# server receives content from client
server_socket.recv(output_path.format("all_bad"))
# content received by server matches the content sent by client
# calculate checksum of both input and output file and compare them
f_in = open(input_file, 'rb')
inp_bytes = f_in.read()
f_in.close()
f_out = open(output_file.format("all_bad"), 'rb')
outp_bytes = f_out.read()
f_out.close()
self.assertEqual(inp_bytes, outp_bytes, "The input and output file are NOT equal.")
self.assertEqual(calculate_checksum(inp_bytes), calculate_checksum(outp_bytes),
"The checksum of the input and output file are NOT equal.")
def test_ideal_network(self):
"""reliability over an ideal framework"""
# setup environment (nothing to set)
# launch localhost client connecting to server
client_socket.connect()
# client sends content to server
client_socket.send(input_file)
# because it takes a bit of time for the data to be send over, there needs to be a bit of a delay here
time.sleep(0.3)
# server receives content from client
server_socket.recv(output_path.format("ideal"))
# content received by server matches the content sent by client
# calculate checksum of both input and output file and compare them
f_in = open(input_file, 'rb')
inp_bytes = f_in.read()
f_in.close()
f_out = open(output_file.format("ideal"), 'rb')
outp_bytes = f_out.read()
f_out.close()
self.assertEqual(inp_bytes, outp_bytes, "The input and output file are NOT equal.")
self.assertEqual(calculate_checksum(inp_bytes), calculate_checksum(outp_bytes),
"The checksum of the input and output file are NOT equal.")
def test_flipping_network(self):
"""reliability over network with bit flips
(which sometimes results in lower layer packet loss)"""
# setup environment
run_command(netem_change.format("corrupt 1%"))
# launch localhost client connecting to server
client_socket.connect()
# client sends content to server
client_socket.send(input_file)
# because it takes a bit of time for the data to be send over, there needs to be a bit of a delay here
time.sleep(0.3)
# server receives content from client
server_socket.recv(output_path.format("flip"))
# content received by server matches the content sent by client
# calculate checksum of both input and output file and compare them
f_in = open(input_file, 'rb')
inp_bytes = f_in.read()
f_in.close()
f_out = open(output_file.format("flip"), 'rb')
outp_bytes = f_out.read()
f_out.close()
self.assertEqual(inp_bytes, outp_bytes, "The input and output file are NOT equal.")
self.assertEqual(calculate_checksum(inp_bytes), calculate_checksum(outp_bytes),
"The checksum of the input and output file are NOT equal.")