def testUdpDelay(self):
if not platformsettings.has_ipfw():
logging.warning('ipfw is not available in path. Skip the test')
return
for delay_ms in (100, 170):
expected_ms = delay_ms / 2
with TimedUdpServer(self.host, self.dns_port):
with self.TrafficShaper(delay_ms=delay_ms):
send_ms, receive_ms = self.GetUdpSendReceiveTimesMs()
self.assertAlmostEqual(expected_ms, send_ms, tolerance=0.10)
self.assertAlmostEqual(expected_ms, receive_ms, tolerance=0.10)
def testTcpDownloadShaping(self):
"""Verify that 'down' bandwidth is shaped on TCP connections."""
if not platformsettings.has_ipfw():
logging.warning('ipfw is not available in path. Skip the test')
return
num_bytes = 1024 * 100
bandwidth_kbits = 2000
expected_ms = 8.0 * num_bytes / bandwidth_kbits
with TimedTcpServer(self.host, self.port):
with self.TrafficShaper(down_bandwidth='%sKbit/s' % bandwidth_kbits):
self.assertAlmostEqual(expected_ms, self.GetTcpReceiveTimeMs(num_bytes))
def testTcpConnectToIp(self):
"""Verify that it takes |delay_ms| to establish a TCP connection."""
if not platformsettings.has_ipfw():
logging.warning('ipfw is not available in path. Skip the test')
return
with TimedTcpServer(self.host, self.port):
for delay_ms in (100, 175):
with self.TrafficShaper(delay_ms=delay_ms):
start_time = self.timer()
with self.tcp_socket_creator:
connect_time = GetElapsedMs(start_time, self.timer())
self.assertAlmostEqual(delay_ms, connect_time, tolerance=0.12)
def testTcpUploadShaping(self):
"""Verify that 'up' bandwidth is shaped on TCP connections."""
if not platformsettings.has_ipfw():
logging.warning('ipfw is not available in path. Skip the test')
return
num_bytes = 1024 * 100
bandwidth_kbits = 2000
expected_ms = 8.0 * num_bytes / bandwidth_kbits
with TimedTcpServer(self.host, self.port):
with self.TrafficShaper(up_bandwidth='%sKbit/s' % bandwidth_kbits):
self.assertValuesAlmostEqual(expected_ms,
self.GetTcpSendTimeMs(num_bytes))
def testTcpConnectToIp(self):
"""Verify that it takes |delay_ms| to establish a TCP connection."""
if not platformsettings.has_ipfw():
logging.warning('ipfw is not available in path. Skip the test')
return
with TimedTcpServer(self.host, self.port):
for delay_ms in (100, 175):
with self.TrafficShaper(delay_ms=delay_ms):
start_time = self.timer()
with self.tcp_socket_creator:
connect_time = GetElapsedMs(start_time, self.timer())
self.assertAlmostEqual(delay_ms, connect_time, tolerance=0.12)
def testUdpDelay(self):
if not platformsettings.has_ipfw():
logging.warning('ipfw is not available in path. Skip the test')
return
for delay_ms in (100, 170):
expected_ms = delay_ms / 2
with TimedUdpServer(self.host, self.dns_port):
with self.TrafficShaper(delay_ms=delay_ms):
send_ms, receive_ms = self.GetUdpSendReceiveTimesMs()
self.assertValuesAlmostEqual(expected_ms,
send_ms,
tolerance=0.10)
self.assertValuesAlmostEqual(expected_ms,
receive_ms,
tolerance=0.10)
