def test_v1_multi_channel_and_always_multi_is_multi_channel():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = 3 # multi channel
connection = I2cConnection(transceiver)
connection.always_multi_channel_response = True
assert connection.is_multi_channel is True
def test_v1_single_channel_error():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = None
transceiver.transceive.return_value = (3, Exception("timeout"), b"")
connection = I2cConnection(transceiver)
with pytest.raises(I2cTimeoutError):
connection.execute(0x42, I2cCommand(b"\x55", 3, 0.1, 0.2))
def test_v1_single_channel_execute_wait_post_process_false():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = None
transceiver.transceive.return_value = (0, None, b"\x11\x22\x33")
connection = I2cConnection(transceiver)
response = connection.execute(0x42,
I2cCommand(b"\x55", 3, 0.1, 0.2, 0.1),
wait_post_process=False)
assert response == b"\x11\x22\x33"
def test_single_channel_with_connection():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = None
transceiver.transceive.return_value = (0, None, b"\x11\x22")
connection = I2cConnection(transceiver)
device = I2cDevice(connection, 0x42)
assert device.connection == connection
assert device.slave_address == 0x42
assert device.execute(I2cCommand(b"\x55", 3, 0.1, 0.2)) == b"\x11\x22"
def test_v1_single_channel_execute():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = None
transceiver.transceive.return_value = (0, None, b"\x11\x22\x33")
connection = I2cConnection(transceiver)
response = connection.execute(0x42, I2cCommand(b"\x55", 3, 0.1, 0.2))
args = [kwargs for args, kwargs in transceiver.transceive.call_args_list]
assert args == [
{
"slave_address": 0x42,
"tx_data": b"\x55",
"rx_length": 3,
"read_delay": 0.1,
"timeout": 0.2,
},
]
assert response == b"\x11\x22\x33"
def test_v1_multi_channel_execute():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = 2
transceiver.transceive.return_value = [
(0, None, b"\x11\x22\x33"),
(2, Exception("NACK"), b""),
]
connection = I2cConnection(transceiver)
response = connection.execute(0x42, I2cCommand(b"\x55", 3, 0.1, 0.2))
args = [kwargs for args, kwargs in transceiver.transceive.call_args_list]
assert args == [
{
"slave_address": 0x42,
"tx_data": b"\x55",
"rx_length": 3,
"read_delay": 0.1,
"timeout": 0.2,
},
]
assert len(response) == 2
assert response[0] == b"\x11\x22\x33"
assert type(response[1]) is I2cNackError
def test_is_multi_channel_with_unsupported_api_version():
transceiver = MagicMock()
transceiver.API_VERSION = 99 # unsupported
connection = I2cConnection(transceiver)
with pytest.raises(Exception, match=r".*not supported.*"):
connection.is_multi_channel
def test_v1_multi_channel_is_multi_channel():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = 1 # multi channel
connection = I2cConnection(transceiver)
assert connection.is_multi_channel is True
def test_v1_single_channel_is_multi_channel():
transceiver = MagicMock()
transceiver.API_VERSION = 1
transceiver.channel_count = None # single channel
connection = I2cConnection(transceiver)
assert connection.is_multi_channel is False
