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import unittest
import sh
import re
class Qwifi(unittest.TestCase):
__serverip = None
__numbytestx = None
__bind = None
__bwexpected = None
__port = None
params = None
# varlist content: serverip, bwexpected, port, (optional)bind
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')
if "bind" in varlist:
self.__bind = varlist["bind"]
else:
self.__bind = None
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:
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
if self.__bind is None:
p = sh.iperf("-c", self.__serverip, "-x", "CMSV", "-n", self.__numbytestx, "-f", "m", "-p",
self.__port)
else:
p = sh.iperf("-c", self.__serverip, "-x", "CMSV", "-n", self.__numbytestx, "-f", "m", "-p",
self.__port, "-B", self.__bind)
# check if it was executed succesfully
if p.exit_code == 0:
if p.stdout == "":
self.fail("failed: error executing iperf command")
# analyze output string
# split by lines
lines = p.stdout.splitlines()
# get first line
dat = lines[1].decode('ascii')
# search for the BW value
a = re.search("\d+(\.\d)? Mbits/sec", dat)
b = a.group().split()
bwreal = b[0]
# check if BW is in the expected range
self.failUnless(float(bwreal) > float(self.__bwexpected) * 0.9,
"failed: speed is lower than spected. Speed(MB/s)" + str(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")
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