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tests.py
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import logging
from typing import List, Tuple
from unittest import TestCase
from unittest.mock import Mock
from carmen import Carmen
from carmen_communication import CommunicationCarmen
from carmen_utils import convert_digout
from crc16 import calculate_crc16
# disable logging output
logging.disable()
class __TestCarmenUtils(TestCase):
def test_convert_digout(self):
self.assertAlmostEqual(-0.170959, convert_digout(0xFA8782, 24, -1, 2), 5)
self.assertAlmostEqual(23.925781, convert_digout(0xFEC0, 16, -20, 80, offset=25), 5)
class __TestCRC16(TestCase):
def test_calculate_crc16(self):
test_data = {0xA0: 0xFEC2,
0xA1: 0x7EC7,
0x5A: 0xFCDE,
0x35: 0xFDBC}
for data, crc in test_data.items():
if not isinstance(data, (tuple, list, set)):
data = [data]
self.assertEqual(crc, calculate_crc16(data))
self.assertEqual(0xCD9F, calculate_crc16([0x35, 0x85, 0x0C, 0x00, 0xCE, 0xFD, 0xCF, 0xF2, 0x00, 0x00, 0x80]))
class __TestCommunicationCarmen(TestCase):
@classmethod
def setUpClass(cls) -> None:
cls.serial = Mock()
def setUp(self) -> None:
self.serial.is_open = True
self.serial.write = Mock(side_effect=lambda x: len(x))
self.serial.read = Mock(side_effect=lambda x: [0] * x)
def test___init__(self):
self.assertIsNotNone(CommunicationCarmen(self.serial))
self.serial.is_open = False
with self.assertRaises(IOError):
_ = CommunicationCarmen(self.serial)
def test__send_raw(self):
data = [0] * 10
c = CommunicationCarmen(self.serial)
self.assertTrue(c._send_raw(data))
self.serial.write = Mock(side_effect=lambda x: len(x) + 1)
self.assertFalse(c._send_raw(data))
def test_send(self):
cmd = 1
data = [0] * 10
c = CommunicationCarmen(self.serial)
self.assertTrue(c.send(cmd, data))
self.serial.write = Mock(side_effect=lambda x: len(x) + 1)
self.assertFalse(c.send(cmd, data))
def test__receive_raw(self):
data_length = 10
c = CommunicationCarmen(self.serial)
success, data = c._receive_raw(data_length)
self.assertTrue(success)
self.assertEqual(data_length, len(data))
self.serial.read = Mock(side_effect=lambda x: [0] * (x - 1))
success, data = c._receive_raw(data_length)
self.assertFalse(success)
self.assertEqual(0, len(data))
def test_receive(self):
def side_effect(size):
d = [0] * (size - 2)
crc = calculate_crc16(d)
return d + [crc & 0xFF, crc >> 8]
data_length = 10
c = CommunicationCarmen(self.serial)
self.serial.read = Mock(side_effect=side_effect)
success, data = c.receive(data_length + 2)
self.assertTrue(success)
self.assertEqual(data_length + 2, len(data))
self.serial.read = Mock(side_effect=lambda x: [0] * x)
success, data = c.receive(data_length)
self.assertFalse(success)
self.assertEqual(data_length, len(data))
self.serial.read = Mock(side_effect=lambda x: [0] * (x - 1))
success, data = c.receive(data_length)
self.assertFalse(success)
self.assertEqual(0, len(data))
class __TestCarmen(TestCase):
__valid_responses = {0xA0: [0xA0, 0x80, 0x04, 0xC3],
0xA1: [0xA1, 0x80, 0x07, 0x45],
0x5A: [0x5A, 0x80, 0x0B, 0x5F],
0x35: [0x35, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x6E, 0x5F]}
def mock_send(self, command: int, data: List[int] = None) -> bool:
self.__received_command = command
self.__received_data = data
return True
def mock_receive(self, _: int) -> Tuple[bool, List[int]]:
data = None
if self.__received_data:
if self.__received_command == 0x03:
data = [0x03, 0x80, self.__received_data[2]] + [0x00] * self.__received_data[2] * 4
crc = calculate_crc16(data)
data += [crc & 0xFF, crc >> 8]
else:
data = self.__valid_responses[self.__received_command]
return True, data
def mock_receive_invalid(self, size: int) -> Tuple[bool, List[int]]:
return True, [-0x01] * size
@classmethod
def setUpClass(cls) -> None:
cls.communication = Mock()
def setUp(self) -> None:
self.communication.send = Mock(side_effect=self.mock_send)
self.communication.receive = Mock(side_effect=self.mock_receive)
def test__execute_simple_command(self):
c = Carmen(self.communication)
success, data = c._execute_simple_command(0xA0, 4)
self.assertTrue(success)
self.assertEqual(4, len(data))
self.communication.receive = Mock(side_effect=self.mock_receive_invalid)
success, data = c._execute_simple_command(0xA0, 4)
self.assertFalse(success)
self.assertEqual(0, len(data))
def test_stop_dsp(self):
c = Carmen(self.communication)
success, data = c.stop_dsp()
self.assertTrue(success)
self.assertEqual(4, len(data))
self.communication.receive = Mock(side_effect=self.mock_receive_invalid)
success, data = c.stop_dsp()
self.assertFalse(success)
self.assertEqual(0, len(data))
def test_continue_dsp(self):
c = Carmen(self.communication)
success, data = c.continue_dsp()
self.assertTrue(success)
self.assertEqual(4, len(data))
self.communication.receive = Mock(side_effect=self.mock_receive_invalid)
success, data = c.continue_dsp()
self.assertFalse(success)
self.assertEqual(0, len(data))
def test_soft_reset(self):
c = Carmen(self.communication)
success, data = c.soft_reset()
self.assertTrue(success)
self.assertEqual(4, len(data))
self.communication.receive = Mock(side_effect=self.mock_receive_invalid)
success, data = c.soft_reset()
self.assertFalse(success)
self.assertEqual(0, len(data))
def test_read_measurement_frame1(self):
c = Carmen(self.communication)
success, data = c.read_measurement_frame1()
self.assertTrue(success)
self.assertEqual(13, len(data))
self.communication.receive = Mock(side_effect=self.mock_receive_invalid)
success, data = c.read_measurement_frame1()
self.assertFalse(success)
self.assertEqual(0, len(data))
def test_read_eeprom(self):
start = 0x123
size = 2
c = Carmen(self.communication)
success, data = c.read_eeprom(start, size)
self.assertTrue(success)
self.assertEqual(5 + 4 * size, len(data))
self.communication.receive = Mock(side_effect=self.mock_receive_invalid)
success, data = c.read_eeprom(start, size)
self.assertFalse(success)
self.assertEqual(0, len(data))