from test.helpers.syscmd import SysCommand
import unittest
import uuid
import serial
import time

class Qserial(unittest.TestCase):

    def __init__(self, testname, testfunc, port, baudrate):
        super(Qserial, self).__init__(testfunc)
        self.__port = port
        self.__serial = serial.Serial(self.__port, timeout=1)
        self.__serial.baudrate = baudrate
        self._testMethodDoc = testname

    def __del__(self):
        self.__serial.close()

    def execute(self):
        self.__serial.flushInput()
        self.__serial.flushOutput()
        test_uuid = str(uuid.uuid4()).encode()
        self.__serial.write(test_uuid)
        time.sleep(0.05)  # there might be a small delay
        if self.__serial.inWaiting() == 0:
            self.fail("failed: PORT {} wait timeout exceded, wrong communication?".format(self.__port))
        else:
            if (self.__serial.readline() != test_uuid):
                self.fail("failed: PORT {} write/read mismatch".format(self.__port))