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import unittest
from test.helpers.amper import Amper
class Qamper(unittest.TestCase):
params = None
__resultlist = None # resultlist is a python list of python dictionaries
dummytest = False
# varlist: undercurrent, overcurrent
def __init__(self, testname, testfunc, varlist):
self.params = varlist
super(Qamper, self).__init__(testfunc)
if "undercurrent" in varlist:
self._undercurrent = varlist["undercurrent"]
else:
raise Exception('undercurrent param inside Qamp must be defined')
if "overcurrent" in varlist:
self._overcurrent = varlist["overcurrent"]
else:
raise Exception('overcurrent param inside Qamp must be defined')
self._testMethodDoc = testname
self.__resultlist = []
if "dummytest" in varlist:
self.dummytest = varlist["dummytest"]
def saveresultinfile(self, currentvalue):
# save result in a file
with open('/mnt/station_ramdisk/amper.txt', 'w') as outfile:
n = outfile.write("Current: {} A".format(currentvalue))
outfile.close()
self.__resultlist.append(
{
"description": "Amperimeter values",
"filepath": "/mnt/station_ramdisk/amper.txt",
"mimetype": "text/plain"
}
)
def execute(self):
if self.dummytest == '1':
self.current = "0.0"
self.saveresultinfile(self.current)
return
amp = Amper()
# open serial connection
if not amp.open():
self.fail("Error: can not open a serial port")
# check if the amperimeter is connected and working
# 2 ATTEMTS
if not amp.hello():
if not amp.hello():
self.fail("Error: can not communicate")
# get current value (in Amperes)
self.current = amp.getCurrent()
# save result in a file
self.saveresultinfile(self.current)
# close serial connection
amp.close()
# Check current range
if float(self.current) > float(self._overcurrent):
# Overcurrent detected
self.fail("failed: Overcurrent detected ( {} )".format(self.current))
elif float(self.current) < float(self._undercurrent):
# Undercurrent detected
self.fail("failed: Undercurrent detected ( {} )".format(self.current))
def getresults(self):
return self.__resultlist
def gettextresult(self):
return "{} A".format(self.current)
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