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import unittest
import sh
import re
import json
class Qwifi(unittest.TestCase):
__serverip = None
__numbytestx = None
__bwexpected = None
__port = None
params = None
__bwreal = None
# varlist content: serverip, bwexpected, port
def __init__(self, testname, testfunc, varlist):
self.params = varlist
super(Qwifi, self).__init__(testfunc)
if "serverip" in varlist:
self.__serverip = varlist["serverip"]
else:
raise Exception('serverip param inside Qwifi have been be defined')
if "bwexpected" in varlist:
self.__bwexpected = varlist["bwexpected"]
else:
raise Exception('OKBW param inside Qwifi must be defined')
if "port" in varlist:
self.__port = varlist["port"]
else:
raise Exception('port param inside Qwifi must be defined')
self.__numbytestx = "10M"
self._testMethodDoc = testname
def execute(self):
# check if the board is connected to the router by wifi
p = sh.iw("wlan0", "link")
if p.exit_code == 0:
# get the first line of the output stream
out1 = p.stdout.decode('ascii').splitlines()[0]
if out1 != "Not connected.":
# check if the board has ip in the wlan0 interface
p = sh.ifconfig("wlan0")
if p.exit_code == 0:
# check if wlan0 has an IP
result = re.search(
'inet addr:(?!127\.0{1,3}\.0{1,3}\.0{0,2}1$)((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)',
p.stdout.decode('ascii'))
if result:
# execute iperf command against the server
try:
p = sh.iperf3("-c", self.__serverip, "-n", self.__numbytestx, "-f", "m", "-p", self.__port,
"-J", _timeout=20)
except sh.TimeoutException:
self.fail("failed: iperf timeout reached")
# check if it was executed succesfully
if p.exit_code == 0:
if p.stdout == "":
self.fail("failed: error executing iperf command")
# analyze output string
data = json.loads(p.stdout.decode('ascii'))
self.__bwreal = float(data['end']['sum_received']['bits_per_second']) / 1024 / 1024
# save result file
with open('/tmp/wifi-iperf.json', 'w') as outfile:
json.dump(data, outfile, indent=4)
# check if BW is in the expected range
self.failUnless(self.__bwreal > float(self.__bwexpected) * 0.9,
"failed: speed is lower than spected. Speed(Mbits/s)" + str(self.__bwreal))
else:
self.fail("failed: could not complete iperf command")
else:
self.fail("failed: wlan0 interface doesn't have any ip address.")
else:
self.fail("failed: could not complete ifconfig command.")
else:
self.fail("failed: wifi module is not connected to the router.")
else:
self.fail("failed: couldn't execute iw command")
def getresults(self):
# resultlist is a python list of python dictionaries
resultlist = [
{
"desc": "iperf3 output",
"data": "/tmp/wifi-iperf.json",
"type": "file"
}
]
return resultlist
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