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479 lines (424 loc) · 14.4 KB
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#!/usr/bin/env python
import unittest.mock
from typing import cast, Optional
from serial.serialutil import SerialBase
import can.interfaces.slcan
from .config import IS_PYPY
"""
Mentioned in #1010 & #1490
> PyPy works best with pure Python applications. Whenever you use a C extension module,
> it runs much slower than in CPython. The reason is that PyPy can't optimize C extension modules since they're not fully supported.
> In addition, PyPy has to emulate reference counting for that part of the code, making it even slower.
https://realpython.com/pypy-faster-python/#it-doesnt-work-well-with-c-extensions
"""
TIMEOUT = 0.5 if IS_PYPY else 0.01 # 0.001 is the default set in slcanBus
class SerialMock(SerialBase):
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
self._input_buffer = b""
self._output_buffer = b""
def open(self) -> None:
self.is_open = True
def close(self) -> None:
self.is_open = False
self._input_buffer = b""
self._output_buffer = b""
def read(self, size: int = -1, /) -> bytes:
if size > 0:
data = self._input_buffer[:size]
self._input_buffer = self._input_buffer[size:]
return data
return b""
def write(self, b: bytes, /) -> Optional[int]:
self._output_buffer = b
if b == b"N\r":
self.set_input_buffer(b"NA123\r")
elif b == b"V\r":
self.set_input_buffer(b"V1013\r")
return len(b)
def set_input_buffer(self, expected: bytes) -> None:
self._input_buffer = expected
def get_output_buffer(self) -> bytes:
return self._output_buffer
def reset_input_buffer(self) -> None:
self._input_buffer = b""
@property
def in_waiting(self) -> int:
return len(self._input_buffer)
@classmethod
def serial_for_url(cls, *args, **kwargs) -> SerialBase:
return cls(*args, **kwargs)
class slcanTestCase(unittest.TestCase):
@unittest.mock.patch("serial.serial_for_url", SerialMock.serial_for_url)
def setUp(self):
self.bus = cast(
can.interfaces.slcan.slcanBus,
can.Bus(
"loop://",
interface="slcan",
sleep_after_open=0,
timeout=TIMEOUT,
bitrate=500000,
),
)
self.serial = cast(SerialMock, self.bus.serialPortOrig)
self.serial.reset_input_buffer()
def tearDown(self):
self.bus.shutdown()
def test_recv_extended(self):
self.serial.set_input_buffer(b"T12ABCDEF2AA55\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x12ABCDEF)
self.assertEqual(msg.is_extended_id, True)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.dlc, 2)
self.assertSequenceEqual(msg.data, [0xAA, 0x55])
# Ewert Energy Systems CANDapter specific
self.serial.set_input_buffer(b"x12ABCDEF2AA55\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x12ABCDEF)
self.assertEqual(msg.is_extended_id, True)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.dlc, 2)
self.assertSequenceEqual(msg.data, [0xAA, 0x55])
def test_send_extended(self):
payload = b"T12ABCDEF2AA55\r"
msg = can.Message(
arbitration_id=0x12ABCDEF, is_extended_id=True, data=[0xAA, 0x55]
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_standard(self):
self.serial.set_input_buffer(b"t4563112233\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x456)
self.assertEqual(msg.is_extended_id, False)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.dlc, 3)
self.assertSequenceEqual(msg.data, [0x11, 0x22, 0x33])
def test_send_standard(self):
payload = b"t4563112233\r"
msg = can.Message(
arbitration_id=0x456, is_extended_id=False, data=[0x11, 0x22, 0x33]
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_standard_remote(self):
self.serial.set_input_buffer(b"r1238\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x123)
self.assertEqual(msg.is_extended_id, False)
self.assertEqual(msg.is_remote_frame, True)
self.assertEqual(msg.dlc, 8)
def test_send_standard_remote(self):
payload = b"r1238\r"
msg = can.Message(
arbitration_id=0x123, is_extended_id=False, is_remote_frame=True, dlc=8
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_extended_remote(self):
self.serial.set_input_buffer(b"R12ABCDEF6\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x12ABCDEF)
self.assertEqual(msg.is_extended_id, True)
self.assertEqual(msg.is_remote_frame, True)
self.assertEqual(msg.dlc, 6)
def test_send_extended_remote(self):
payload = b"R12ABCDEF6\r"
msg = can.Message(
arbitration_id=0x12ABCDEF, is_extended_id=True, is_remote_frame=True, dlc=6
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_fd(self):
self.serial.set_input_buffer(b"d123A303132333435363738393a3b3c3d3e3f\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x123)
self.assertEqual(msg.is_extended_id, False)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.is_fd, True)
self.assertEqual(msg.bitrate_switch, False)
self.assertEqual(msg.dlc, 16)
self.assertSequenceEqual(
msg.data,
[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
def test_send_fd(self):
payload = b"d123A303132333435363738393A3B3C3D3E3F\r"
msg = can.Message(
arbitration_id=0x123,
is_extended_id=False,
is_fd=True,
data=[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_fd_extended(self):
self.serial.set_input_buffer(b"D12ABCDEFA303132333435363738393A3B3C3D3E3F\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x12ABCDEF)
self.assertEqual(msg.is_extended_id, True)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.dlc, 16)
self.assertEqual(msg.bitrate_switch, False)
self.assertTrue(msg.is_fd)
self.assertSequenceEqual(
msg.data,
[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
def test_send_fd_extended(self):
payload = b"D12ABCDEFA303132333435363738393A3B3C3D3E3F\r"
msg = can.Message(
arbitration_id=0x12ABCDEF,
is_extended_id=True,
is_fd=True,
data=[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_fd_brs(self):
self.serial.set_input_buffer(b"b123A303132333435363738393a3b3c3d3e3f\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x123)
self.assertEqual(msg.is_extended_id, False)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.is_fd, True)
self.assertEqual(msg.bitrate_switch, True)
self.assertEqual(msg.dlc, 16)
self.assertSequenceEqual(
msg.data,
[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
def test_send_fd_brs(self):
payload = b"b123A303132333435363738393A3B3C3D3E3F\r"
msg = can.Message(
arbitration_id=0x123,
is_extended_id=False,
is_fd=True,
bitrate_switch=True,
data=[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_recv_fd_brs_extended(self):
self.serial.set_input_buffer(b"B12ABCDEFA303132333435363738393A3B3C3D3E3F\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x12ABCDEF)
self.assertEqual(msg.is_extended_id, True)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.dlc, 16)
self.assertEqual(msg.bitrate_switch, True)
self.assertTrue(msg.is_fd)
self.assertSequenceEqual(
msg.data,
[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
def test_send_fd_brs_extended(self):
payload = b"B12ABCDEFA303132333435363738393A3B3C3D3E3F\r"
msg = can.Message(
arbitration_id=0x12ABCDEF,
is_extended_id=True,
is_fd=True,
bitrate_switch=True,
data=[
0x30,
0x31,
0x32,
0x33,
0x34,
0x35,
0x36,
0x37,
0x38,
0x39,
0x3A,
0x3B,
0x3C,
0x3D,
0x3E,
0x3F,
],
)
self.bus.send(msg)
self.assertEqual(payload, self.serial.get_output_buffer())
self.serial.set_input_buffer(payload)
rx_msg = self.bus.recv(TIMEOUT)
self.assertTrue(msg.equals(rx_msg, timestamp_delta=None))
def test_partial_recv(self):
self.serial.set_input_buffer(b"T12ABCDEF")
msg = self.bus.recv(TIMEOUT)
self.assertIsNone(msg)
self.serial.set_input_buffer(b"2AA55\rT12")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
self.assertEqual(msg.arbitration_id, 0x12ABCDEF)
self.assertEqual(msg.is_extended_id, True)
self.assertEqual(msg.is_remote_frame, False)
self.assertEqual(msg.dlc, 2)
self.assertSequenceEqual(msg.data, [0xAA, 0x55])
msg = self.bus.recv(TIMEOUT)
self.assertIsNone(msg)
self.serial.set_input_buffer(b"ABCDEF2AA55\r")
msg = self.bus.recv(TIMEOUT)
self.assertIsNotNone(msg)
def test_version(self):
hw_ver, sw_ver = self.bus.get_version(0)
self.assertEqual(b"V\r", self.serial.get_output_buffer())
self.assertEqual(hw_ver, 10)
self.assertEqual(sw_ver, 13)
def test_serial_number(self):
sn = self.bus.get_serial_number(0)
self.assertEqual(b"N\r", self.serial.get_output_buffer())
self.assertEqual(sn, "A123")
if __name__ == "__main__":
unittest.main()
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