import unittest
import sh


class Qnand(unittest.TestCase):
    params = None
    __device = "10M"

    # varlist: device
    def __init__(self, testname, testfunc, varlist):
        self.params = varlist
        super(Qnand, self).__init__(testfunc)
        if "device" in varlist:
            self.__device = varlist["device"]
        else:
            raise Exception('device param inside Qnand must be defined')
        self._testMethodDoc = testname

    def execute(self):
        try:
            sh.nandtest("-m", self.__device, _out="/dev/null")
        except sh.ErrorReturnCode as e:
            self.fail("failed: could not complete nandtest command")