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import asyncio
import pytest
from serial_asyncio import SerialTransport
import zigpy_znp.types as t
import zigpy_znp.config as conf
import zigpy_znp.commands as c
from zigpy_znp import uart as znp_uart
from zigpy_znp.frames import TransportFrame
@pytest.fixture
def connected_uart(mocker):
znp = mocker.Mock()
uart = znp_uart.ZnpMtProtocol(znp)
uart.connection_made(mocker.Mock())
yield znp, uart
@pytest.fixture
async def dummy_serial_conn(mocker):
device = "/dev/ttyACM0"
serial_interface = mocker.Mock()
serial_interface.name = device
def create_serial_conn(loop, protocol_factory, url, *args, **kwargs):
fut = loop.create_future()
assert url == device
protocol = protocol_factory()
# Our event loop doesn't really do anything
loop.add_writer = lambda *args, **kwargs: None
loop.add_reader = lambda *args, **kwargs: None
loop.remove_writer = lambda *args, **kwargs: None
loop.remove_reader = lambda *args, **kwargs: None
transport = SerialTransport(loop, protocol, serial_interface)
protocol.connection_made(transport)
fut.set_result((transport, protocol))
return fut
mocker.patch("serial_asyncio.create_serial_connection", new=create_serial_conn)
return device, serial_interface
def test_uart_rx_basic(connected_uart):
znp, uart = connected_uart
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
uart.data_received(test_frame_bytes)
znp.frame_received.assert_called_once_with(test_frame)
def test_uart_str_repr(connected_uart):
znp, uart = connected_uart
str(uart)
repr(uart)
def test_uart_rx_byte_by_byte(connected_uart):
znp, uart = connected_uart
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
for byte in test_frame_bytes:
uart.data_received(bytes([byte]))
znp.frame_received.assert_called_once_with(test_frame)
def test_uart_rx_byte_by_byte_garbage(connected_uart):
znp, uart = connected_uart
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
data = b""
data += bytes.fromhex("58 4a 72 35 51 da 60 ed 1f")
data += bytes.fromhex("03 6d b6")
data += bytes.fromhex("ee 90")
data += test_frame_bytes
data += bytes.fromhex("00 00")
data += bytes.fromhex("e4 4f 51 b2 39 4b 8d e3 ca 61")
data += bytes.fromhex("8c 56 8a 2c d8 22 64 9e 9d 7b")
# The frame should be parsed identically regardless of framing
for byte in data:
uart.data_received(bytes([byte]))
znp.frame_received.assert_called_once_with(test_frame)
def test_uart_rx_big_garbage(connected_uart):
znp, uart = connected_uart
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
data = b""
data += bytes.fromhex("58 4a 72 35 51 da 60 ed 1f")
data += bytes.fromhex("03 6d b6")
data += bytes.fromhex("ee 90")
data += test_frame_bytes
data += bytes.fromhex("00 00")
data += bytes.fromhex("e4 4f 51 b2 39 4b 8d e3 ca 61")
data += bytes.fromhex("8c 56 8a 2c d8 22 64 9e 9d 7b")
# The frame should be parsed identically regardless of framing
uart.data_received(data)
znp.frame_received.assert_called_once_with(test_frame)
def test_uart_rx_corrupted_fcs(connected_uart):
znp, uart = connected_uart
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
# Almost, but not quite
uart.data_received(test_frame_bytes[:-1])
uart.data_received(b"\x00")
assert not znp.frame_received.called
def test_uart_rx_sof_stress(connected_uart):
znp, uart = connected_uart
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
# We include an almost-valid frame and many stray SoF markers
uart.data_received(b"\xFE" + b"\xFE" + b"\xFE" + test_frame_bytes[:-1] + b"\x00")
uart.data_received(b"\xFE\xFE\x00\xFE\x01")
uart.data_received(b"\xFE" + b"\xFE" + b"\xFE" + test_frame_bytes + b"\x00\x00")
# We should see the valid frame exactly once
znp.frame_received.assert_called_once_with(test_frame)
def test_uart_frame_received_error(connected_uart, mocker):
znp, uart = connected_uart
znp.frame_received = mocker.Mock(side_effect=RuntimeError("An error"))
test_command = c.SYS.ResetInd.Callback(
Reason=t.ResetReason.PowerUp,
TransportRev=0x00,
ProductId=0x45,
MajorRel=0x01,
MinorRel=0x02,
MaintRel=0x03,
)
test_frame = test_command.to_frame()
test_frame_bytes = TransportFrame(test_frame).serialize()
# Errors thrown by znp.frame_received should not impact how many frames are handled
uart.data_received(test_frame_bytes * 3)
# We should have received all three frames
assert znp.frame_received.call_count == 3
async def test_connection_lost(dummy_serial_conn, mocker):
device, _ = dummy_serial_conn
znp = mocker.Mock()
conn_lost_fut = asyncio.get_running_loop().create_future()
znp.connection_lost = conn_lost_fut.set_result
protocol = await znp_uart.connect(
conf.SCHEMA_DEVICE({conf.CONF_DEVICE_PATH: device}), api=znp
)
exception = RuntimeError("Uh oh, something broke")
protocol.connection_lost(exception)
# Losing a connection propagates up to the ZNP object
assert (await conn_lost_fut) == exception
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