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import unittest
from test.helpers.amper import Amper
class Qamper(unittest.TestCase):
params = None
# 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
def execute(self):
amp = Amper()
# open serial connection
if not amp.open():
self.fail("failed: can not open serial port")
return
# check if the amperimeter is connected and working
if not amp.hello():
self.fail("failed: can not communicate")
return
# get current value (in Amperes)
result = amp.getCurrent()
# close serial connection
amp.close()
# # In order to give a valid result it is importarnt to define an under current value
if result > float(self._overcurrent):
self.fail("failed: Overcurrent detected ( {} )".format(result))
if result < float(self._undercurrent):
self.fail("failed: Undercurrent detected ( {} )".format(result))
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