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 multi-command

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test_OBDCommand.py

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from obd.OBDCommand import OBDCommand

from obd.UnitsAndScaling import Unit

from obd.decoders import noop

from obd.protocols import *

def test_constructor():

# default constructor

# name description cmd bytes decoder ECU

cmd = OBDCommand("Test", "example OBD command", b"0123", 2, noop, ECU.ENGINE)

assert cmd.name == "Test"

assert cmd.desc == "example OBD command"

assert cmd.command == b"0123"

assert cmd.bytes == 2

assert cmd.decode == noop

assert cmd.ecu == ECU.ENGINE

assert cmd.fast == False

assert cmd.mode == 1

assert cmd.pid == 35

# a case where "fast", and "supported" were set explicitly

# name description cmd bytes decoder ECU fast

cmd = OBDCommand("Test 2", "example OBD command", b"0123", 2, noop, ECU.ENGINE, True)

assert cmd.fast == True

def test_clone():

# name description mode cmd bytes decoder

cmd = OBDCommand("", "", b"0123", 2, noop, ECU.ENGINE)

other = cmd.clone()

assert cmd.name == other.name

assert cmd.desc == other.desc

assert cmd.command == other.command

assert cmd.bytes == other.bytes

assert cmd.decode == other.decode

assert cmd.ecu == other.ecu

assert cmd.fast == cmd.fast

def test_call():

p = SAE_J1850_PWM(["48 6B 10 41 00 FF FF FF FF AA"]) # train the ecu_map to identify the engine

messages = p(["48 6B 10 41 00 BE 1F B8 11 AA"]) # parse valid data into response object

print(messages[0].data)

# valid response size

cmd = OBDCommand("", "", b"0123", 6, noop, ECU.ENGINE)

r = cmd(messages)

assert r.value == bytearray([0x41, 0x00, 0xBE, 0x1F, 0xB8, 0x11])

# response too short (pad)

cmd = OBDCommand("", "", b"0123", 7, noop, ECU.ENGINE)

r = cmd(messages)

assert r.value == bytearray([0x41, 0x00, 0xBE, 0x1F, 0xB8, 0x11, 0x00])

# response too long (clip)

cmd = OBDCommand("", "", b"0123", 5, noop, ECU.ENGINE)

r = cmd(messages)

assert r.value == bytearray([0x41, 0x00, 0xBE, 0x1F, 0xB8])

def test_get_mode():

cmd = OBDCommand("", "", b"0123", 4, noop, ECU.ENGINE)

assert cmd.mode == 0x01

cmd = OBDCommand("", "", b"", 4, noop, ECU.ENGINE)

assert cmd.mode == None

cmd = OBDCommand("", "", b"totally not hex", 4, noop, ECU.ENGINE)

assert cmd.mode == None

def test_pid():

cmd = OBDCommand("", "", b"0123", 4, noop, ECU.ENGINE)

assert cmd.pid == 0x23

cmd = OBDCommand("", "", b"01", 4, noop, ECU.ENGINE)

assert cmd.pid == None

cmd = OBDCommand("", "", b"totally not hex", 4, noop, ECU.ENGINE)

assert cmd.mode == None