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#!/usr/bin/env python
from pathlib import Path
import tempfile
import unittest
import numpy as np
from asammdf import MDF, Signal
from asammdf.blocks.mdf_v4 import MDF4
CHANNEL_LEN = 100000
class TestMDF4(unittest.TestCase):
tempdir: tempfile.TemporaryDirectory[str]
@classmethod
def setUpClass(cls) -> None:
cls.tempdir = tempfile.TemporaryDirectory()
def test_measurement(self) -> None:
self.assertTrue(MDF4)
def test_read_mdf4_00(self) -> None:
seed = np.random.randint(0, 2**31)
np.random.seed(seed)
print("Read 4.00 using seed =", seed)
sig_int = Signal(
np.random.randint(-(2**31), 2**31, CHANNEL_LEN),
np.arange(CHANNEL_LEN),
name="Integer Channel",
unit="unit1",
)
sig_float = Signal(
np.random.random(CHANNEL_LEN),
np.arange(CHANNEL_LEN),
name="Float Channel",
unit="unit2",
)
with MDF(version="4.00") as mdf:
mdf.append([sig_int, sig_float], common_timebase=True)
outfile = mdf.save(Path(TestMDF4.tempdir.name) / "tmp", overwrite=True)
with MDF(outfile) as mdf:
ret_sig_int = mdf.get(sig_int.name)
ret_sig_float = mdf.get(sig_float.name)
self.assertTrue(np.array_equal(ret_sig_int.samples, sig_int.samples))
self.assertTrue(np.array_equal(ret_sig_float.samples, sig_float.samples))
def test_read_mdf4_10(self) -> None:
seed = np.random.randint(0, 2**31)
np.random.seed(seed)
print("Read 4.10 using seed =", seed)
sig_int = Signal(
np.random.randint(-(2**31), 2**31, CHANNEL_LEN),
np.arange(CHANNEL_LEN),
name="Integer Channel",
unit="unit1",
)
sig_float = Signal(
np.random.random(CHANNEL_LEN),
np.arange(CHANNEL_LEN),
name="Float Channel",
unit="unit2",
)
with MDF(version="4.10") as mdf:
mdf.append([sig_int, sig_float], common_timebase=True)
outfile = mdf.save(Path(TestMDF4.tempdir.name) / "tmp", overwrite=True)
with MDF(outfile) as mdf:
ret_sig_int = mdf.get(sig_int.name)
ret_sig_float = mdf.get(sig_float.name)
self.assertTrue(np.array_equal(ret_sig_int.samples, sig_int.samples))
self.assertTrue(np.array_equal(ret_sig_float.samples, sig_float.samples))
def test_attachment_blocks_wo_filename(self) -> None:
original_data = b"Testing attachemnt block\nTest line 1"
mdf = MDF()
mdf.attach(
original_data,
file_name=None,
comment="",
compression=True,
mime=r"text/plain",
embedded=True,
)
outfile = mdf.save(Path(TestMDF4.tempdir.name) / "attachment.mf4", overwrite=True)
with MDF(outfile) as attachment_mdf:
data, filename, md5_sum = attachment_mdf.extract_attachment(index=0)
self.assertEqual(data, original_data)
self.assertEqual(filename, Path("bin.bin"))
mdf.close()
def test_attachment_blocks_w_filename(self) -> None:
original_data = b"Testing attachemnt block\nTest line 1"
original_file_name = "file.txt"
mdf = MDF()
mdf.attach(
original_data,
file_name=original_file_name,
comment="",
compression=True,
mime=r"text/plain",
embedded=True,
)
outfile = mdf.save(Path(TestMDF4.tempdir.name) / "attachment.mf4", overwrite=True)
with MDF(outfile) as attachment_mdf:
data, filename, md5_sum = attachment_mdf.extract_attachment(index=0)
self.assertEqual(data, original_data)
self.assertEqual(filename, Path(original_file_name))
mdf.close()
def test_channel_with_boolean_array(self) -> None:
timestamps = np.array([0.1, 0.2, 0.3, 0.4, 0.5], dtype=np.float32)
samples = [np.ones((5, 2), dtype=np.uint8)]
types = [("boolean_array_channel", "(2, )<u1")]
record = np.rec.fromarrays(samples, dtype=np.dtype(types))
boolean_array_channel = Signal(
record,
timestamps=timestamps,
name="boolean_array_channel",
)
mdf4 = MDF(version="4.10")
mdf4.append(signals=[boolean_array_channel])
# set bit count to 1 to indicate that each uint8 value is a boolean flag in boolean_array_channel
mdf4.groups[0].channels[1].bit_count = 1
signal = mdf4.select([("boolean_array_channel", 0, 1)])[0]
self.assertTrue((record == signal.samples).all())
if __name__ == "__main__":
unittest.main()
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