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test_CAN_bus_loogging.py
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#!/usr/bin/env python
from pathlib import Path
import tempfile
import unittest
import urllib
from zipfile import ZipFile
import numpy as np
from asammdf import MDF
class TestCANBusLogging(unittest.TestCase):
tempdir_obd = None
tempdir_j1939 = None
@classmethod
def setUpClass(cls):
cls.tempdir_obd = tempfile.TemporaryDirectory()
cls.tempdir_j1939 = tempfile.TemporaryDirectory()
url = "https://github.com/danielhrisca/asammdf/files/4328945/OBD2-DBC-MDF4.zip"
urllib.request.urlretrieve(url, "test.zip")
ZipFile(r"test.zip").extractall(cls.tempdir_obd.name)
Path("test.zip").unlink()
url = "https://github.com/danielhrisca/asammdf/files/4076869/J1939-DBC-MDF4.zip"
urllib.request.urlretrieve(url, "test.zip")
ZipFile(r"test.zip").extractall(cls.tempdir_j1939.name)
Path("test.zip").unlink()
def test_obd_extract(self):
print("OBD extract")
temp_dir = Path(TestCANBusLogging.tempdir_obd.name)
for file in temp_dir.iterdir():
print(file)
mdf = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".mf4"][0]
mdf = MDF(mdf)
dbc = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".dbc"][0]
signals = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".npy"]
out = mdf.extract_bus_logging({"CAN": [(dbc, 0)]})
for signal in signals:
name = signal.stem
target = np.load(signal)
sig = out.get(name)
self.assertTrue(np.array_equal(sig.samples, target), f"{name} {sig} {target}")
def test_j1939_extract(self):
print("J1939 extract")
temp_dir = Path(TestCANBusLogging.tempdir_j1939.name)
mdf = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".mf4"][0]
mdf = MDF(mdf)
dbc = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".dbc"][0]
signals = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".npy"]
out = mdf.extract_bus_logging({"CAN": [(dbc, 0)]})
for signal in signals:
name = signal.stem
target = np.load(signal)
values = out.get(name).samples
self.assertTrue(np.array_equal(values, target))
def test_j1939_get_can_signal(self):
print("J1939 get CAN signal")
temp_dir = Path(TestCANBusLogging.tempdir_j1939.name)
mdf = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".mf4"][0]
mdf = MDF(mdf)
dbc = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".dbc"][0]
signals = [input_file for input_file in temp_dir.iterdir() if input_file.suffix == ".npy"]
for signal in signals:
name = signal.stem
target = np.load(signal)
values = mdf.get_can_signal(name=name, database=str(dbc)).samples
self.assertTrue(np.array_equal(values, target))
values = mdf.get_bus_signal("CAN", name=name, database=str(dbc)).samples
self.assertTrue(np.array_equal(values, target))
if __name__ == "__main__":
unittest.main()