2019037ab0
* Update dependency pytest-asyncio to v1.2.0 * don't stop the event loop between test set the loop_scope to session for async tests * remove loop_scope="session" --------- Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: Stefan Allius <stefan.allius@t-online.de>
420 lines
13 KiB
Python
420 lines
13 KiB
Python
# test_with_pytest.py
|
|
import pytest
|
|
import asyncio
|
|
from modbus import Modbus
|
|
from infos import Infos, Register
|
|
|
|
pytest_plugins = ('pytest_asyncio',)
|
|
|
|
class ModbusTestHelper(Modbus):
|
|
def __init__(self):
|
|
super().__init__(self.send_cb)
|
|
self.db = Infos()
|
|
self.pdu = None
|
|
self.send_calls = 0
|
|
self.recv_responses = 0
|
|
def send_cb(self, pdu: bytearray, log_lvl: int, state: str):
|
|
self.pdu = pdu
|
|
self.send_calls += 1
|
|
def resp_handler(self):
|
|
self.recv_responses += 1
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_modbus_crc():
|
|
'''Check CRC-16 calculation'''
|
|
mb = Modbus(None)
|
|
assert 0x0b02 == mb._Modbus__calc_crc(b'\x01\x06\x20\x08\x00\x04')
|
|
assert 0 == mb._Modbus__calc_crc(b'\x01\x06\x20\x08\x00\x04\x02\x0b')
|
|
assert mb._Modbus__check_crc(b'\x01\x06\x20\x08\x00\x04\x02\x0b')
|
|
|
|
assert 0xc803 == mb._Modbus__calc_crc(b'\x01\x06\x20\x08\x00\x00')
|
|
assert 0 == mb._Modbus__calc_crc(b'\x01\x06\x20\x08\x00\x00\x03\xc8')
|
|
assert mb._Modbus__check_crc(b'\x01\x06\x20\x08\x00\x00\x03\xc8')
|
|
|
|
assert 0x5c75 == mb._Modbus__calc_crc(b'\x01\x03\x08\x01\x2c\x00\x2c\x02\x2c\x2c\x46')
|
|
msg = b'\x01\x03\x28\x51'
|
|
msg += b'\x0e\x08\xd3\x00\x29\x13\x87\x00\x3e\x00\x00\x01\x2c\x03\xb4\x00'
|
|
msg += b'\x08\x00\x00\x00\x00\x01\x59\x01\x21\x03\xe6\x00\x00\x00\x00\x00'
|
|
msg += b'\x00\x00\x00\x00\x00\x00\x00\xe6\xef'
|
|
assert 0 == mb._Modbus__calc_crc(msg)
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_build_modbus_pdu():
|
|
'''Check building and sending a MODBUS RTU'''
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,6,0x2000,0x12)
|
|
assert mb.pdu == b'\x01\x06\x20\x00\x00\x12\x02\x07'
|
|
assert mb._Modbus__check_crc(mb.pdu)
|
|
assert mb.last_addr == 1
|
|
assert mb.last_fcode == 6
|
|
assert mb.last_reg == 0x2000
|
|
assert mb.last_len == 18
|
|
assert mb.err == 0
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_req():
|
|
'''Receive a valid request, which must transmitted'''
|
|
mb = ModbusTestHelper()
|
|
assert mb.recv_req(b'\x01\x06\x20\x00\x00\x12\x02\x07')
|
|
assert mb.last_fcode == 6
|
|
assert mb.last_reg == 0x2000
|
|
assert mb.last_len == 0x12
|
|
assert mb.err == 0
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_req_crc_err():
|
|
'''Receive a request with invalid CRC, which must be dropped'''
|
|
mb = ModbusTestHelper()
|
|
assert not mb.recv_req(b'\x01\x06\x20\x00\x00\x12\x02\x08')
|
|
assert mb.pdu == None
|
|
assert mb.last_fcode == 0
|
|
assert mb.last_reg == 0
|
|
assert mb.last_len == 0
|
|
assert mb.err == 1
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_resp_crc_err():
|
|
'''Receive a response with invalid CRC, which must be dropped'''
|
|
mb = ModbusTestHelper()
|
|
# simulate a transmitted request
|
|
mb.req_pend = True
|
|
mb.last_addr = 1
|
|
mb.last_fcode = 3
|
|
mb.last_reg = 0x300e
|
|
mb.last_len = 2
|
|
mb.set_node_id('test')
|
|
# check matching response, but with CRC error
|
|
call = 0
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x04\x01\x2c\x00\x46\xbb\xf3'):
|
|
call += 1
|
|
assert mb.err == 1
|
|
assert 0 == call
|
|
assert mb.req_pend == True
|
|
# cleanup queue
|
|
mb._Modbus__stop_timer()
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_resp_invalid_addr():
|
|
'''Receive a response with wrong server addr, which must be dropped'''
|
|
mb = ModbusTestHelper()
|
|
mb.req_pend = True
|
|
# simulate a transmitted request
|
|
mb.last_addr = 1
|
|
mb.last_fcode = 3
|
|
mb.last_reg = 0x300e
|
|
mb.last_len = 2
|
|
mb.set_node_id('test')
|
|
|
|
# check not matching response, with wrong server addr
|
|
call = 0
|
|
for key, update in mb.recv_resp(mb.db, b'\x02\x03\x04\x01\x2c\x00\x46\x88\xf4'):
|
|
call += 1
|
|
assert mb.err == 2
|
|
assert 0 == call
|
|
assert mb.req_pend == True
|
|
assert mb.que.qsize() == 0
|
|
|
|
# cleanup queue
|
|
mb._Modbus__stop_timer()
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_recv_fcode():
|
|
'''Receive a response with wrong function code, which must be dropped'''
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,4,0x300e,2)
|
|
assert mb.que.qsize() == 0
|
|
assert mb.req_pend
|
|
|
|
# check not matching response, with wrong function code
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x04\x01\x2c\x00\x46\xbb\xf4'):
|
|
call += 1
|
|
|
|
assert mb.err == 3
|
|
assert 0 == call
|
|
assert mb.req_pend == True
|
|
assert mb.que.qsize() == 0
|
|
|
|
# cleanup queue
|
|
mb._Modbus__stop_timer()
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_resp_len():
|
|
'''Receive a response with wrong data length, which must be dropped'''
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,3,0x300e,3)
|
|
assert mb.que.qsize() == 0
|
|
assert mb.req_pend
|
|
assert mb.last_len == 3
|
|
|
|
# check not matching response, with wrong data length
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
for key, update, _ in mb.recv_resp(mb.db, b'\x01\x03\x04\x01\x2c\x00\x46\xbb\xf4'):
|
|
call += 1
|
|
|
|
assert mb.err == 4
|
|
assert 0 == call
|
|
assert mb.req_pend == True
|
|
assert mb.que.qsize() == 0
|
|
|
|
# cleanup queue
|
|
mb._Modbus__stop_timer()
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_unexpect_resp():
|
|
'''Receive a response when we havb't sent a request'''
|
|
mb = ModbusTestHelper()
|
|
assert not mb.req_pend
|
|
|
|
# check unexpected response, which must be dropped
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x04\x01\x2c\x00\x46\xbb\xf4'):
|
|
call += 1
|
|
|
|
assert mb.err == 5
|
|
assert 0 == call
|
|
assert mb.req_pend == False
|
|
assert mb.que.qsize() == 0
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_parse_resp():
|
|
'''Receive matching response and parse the values'''
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,3,0x3007,6)
|
|
assert mb.que.qsize() == 0
|
|
assert mb.req_pend
|
|
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
exp_result = ['V0.0.2C', 4.4, 0.7, 0.7, 30]
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x0c\x01\x2c\x00\x2c\x00\x2c\x00\x46\x00\x46\x00\x46\x32\xc8'):
|
|
if key == 'grid':
|
|
assert update == True
|
|
elif key == 'inverter':
|
|
assert update == True
|
|
elif key == 'env':
|
|
assert update == True
|
|
else:
|
|
assert False
|
|
assert exp_result[call] == val
|
|
call += 1
|
|
assert 0 == mb.err
|
|
assert 5 == call
|
|
assert mb.que.qsize() == 0
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_queue():
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,3,0x3022,4)
|
|
assert mb.que.qsize() == 0
|
|
assert mb.req_pend
|
|
|
|
assert mb.send_calls == 1
|
|
assert mb.pdu == b'\x01\x030"\x00\x04\xeb\x03'
|
|
mb.pdu = None
|
|
assert mb.send_calls == 1
|
|
assert mb.pdu == None
|
|
|
|
assert mb.que.qsize() == 0
|
|
|
|
# cleanup queue
|
|
mb._Modbus__stop_timer()
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_queue2():
|
|
'''Check queue handling for build_msg() calls'''
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,3,0x3007,6)
|
|
mb.build_msg(1,6,0x2008,4)
|
|
assert mb.que.qsize() == 1
|
|
assert mb.req_pend
|
|
mb.build_msg(1,3,0x3007,6)
|
|
assert mb.que.qsize() == 2
|
|
assert mb.req_pend
|
|
|
|
assert mb.send_calls == 1
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
exp_result = ['V0.0.2C', 4.4, 0.7, 0.7, 30]
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x0c\x01\x2c\x00\x2c\x00\x2c\x00\x46\x00\x46\x00\x46\x32\xc8'):
|
|
if key == 'grid':
|
|
assert update == True
|
|
elif key == 'inverter':
|
|
assert update == True
|
|
elif key == 'env':
|
|
assert update == True
|
|
else:
|
|
assert False
|
|
assert exp_result[call] == val
|
|
call += 1
|
|
assert 0 == mb.err
|
|
assert 5 == call
|
|
|
|
assert mb.que.qsize() == 1
|
|
assert mb.send_calls == 2
|
|
assert mb.pdu == b'\x01\x06\x20\x08\x00\x04\x02\x0b'
|
|
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x06\x20\x08\x00\x04\x02\x0b'):
|
|
pass # call generator mb.recv_resp()
|
|
|
|
assert mb.que.qsize() == 0
|
|
assert mb.send_calls == 3
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
call = 0
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x0c\x01\x2c\x00\x2c\x00\x2c\x00\x46\x00\x46\x00\x46\x32\xc8'):
|
|
call += 1
|
|
assert 0 == mb.err
|
|
assert 5 == call
|
|
|
|
assert mb.que.qsize() == 0
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_queue3():
|
|
'''Check queue handling for recv_req() calls'''
|
|
mb = ModbusTestHelper()
|
|
assert mb.recv_req(b'\x01\x03\x30\x07\x00\x06{\t', mb.resp_handler)
|
|
assert mb.recv_req(b'\x01\x06\x20\x08\x00\x04\x02\x0b', mb.resp_handler)
|
|
assert mb.que.qsize() == 1
|
|
assert mb.req_pend
|
|
assert mb.recv_req(b'\x01\x03\x30\x07\x00\x06{\t')
|
|
assert mb.que.qsize() == 2
|
|
assert mb.req_pend
|
|
|
|
assert mb.send_calls == 1
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
assert mb.recv_responses == 0
|
|
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
exp_result = ['V0.0.2C', 4.4, 0.7, 0.7, 30]
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x0c\x01\x2c\x00\x2c\x00\x2c\x00\x46\x00\x46\x00\x46\x32\xc8'):
|
|
if key == 'grid':
|
|
assert update == True
|
|
elif key == 'inverter':
|
|
assert update == True
|
|
elif key == 'env':
|
|
assert update == True
|
|
else:
|
|
assert False
|
|
assert exp_result[call] == val
|
|
call += 1
|
|
assert 0 == mb.err
|
|
assert 5 == call
|
|
assert mb.recv_responses == 1
|
|
|
|
assert mb.que.qsize() == 1
|
|
assert mb.send_calls == 2
|
|
assert mb.pdu == b'\x01\x06\x20\x08\x00\x04\x02\x0b'
|
|
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x06\x20\x08\x00\x04\x02\x0b'):
|
|
pass # no code in loop is OK; calling the generator is the purpose
|
|
assert 0 == mb.err
|
|
assert mb.recv_responses == 2
|
|
|
|
assert mb.que.qsize() == 0
|
|
assert mb.send_calls == 3
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
call = 0
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x0c\x01\x2c\x00\x2c\x00\x2c\x00\x46\x00\x46\x00\x46\x32\xc8'):
|
|
call += 1
|
|
assert 0 == mb.err
|
|
assert mb.recv_responses == 2
|
|
assert 5 == call
|
|
|
|
|
|
assert mb.que.qsize() == 0
|
|
assert not mb.req_pend
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_timeout(my_loop):
|
|
'''Test MODBUS response timeout and RTU retransmitting'''
|
|
assert asyncio.get_running_loop()
|
|
mb = ModbusTestHelper()
|
|
mb.max_retries = 2
|
|
mb.timeout = 0.1 # 100ms timeout for fast testing, expect a time resolution of at least 10ms
|
|
assert asyncio.get_running_loop() == mb.loop
|
|
mb.build_msg(1,3,0x3007,6)
|
|
mb.build_msg(1,6,0x2008,4)
|
|
|
|
assert mb.que.qsize() == 1
|
|
assert mb.req_pend
|
|
assert mb.retry_cnt == 0
|
|
assert mb.send_calls == 1
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
|
|
mb.pdu = None
|
|
await asyncio.sleep(0.11) # wait for first timeout and retransmittion
|
|
assert mb.que.qsize() == 1
|
|
assert mb.req_pend
|
|
assert mb.retry_cnt == 1
|
|
assert mb.send_calls == 2
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
|
|
mb.pdu = None
|
|
await asyncio.sleep(0.11) # wait for second timeout and retransmittion
|
|
assert mb.que.qsize() == 1
|
|
assert mb.req_pend
|
|
assert mb.retry_cnt == 2
|
|
assert mb.send_calls == 3
|
|
assert mb.pdu == b'\x01\x030\x07\x00\x06{\t'
|
|
|
|
mb.pdu = None
|
|
await asyncio.sleep(0.11) # wait for third timeout and next pdu
|
|
assert mb.que.qsize() == 0
|
|
assert mb.req_pend
|
|
assert mb.retry_cnt == 0
|
|
assert mb.send_calls == 4
|
|
assert mb.pdu == b'\x01\x06\x20\x08\x00\x04\x02\x0b'
|
|
|
|
mb.max_retries = 0 # next pdu without retranmsission
|
|
await asyncio.sleep(0.11) # wait for fourth timout
|
|
assert mb.que.qsize() == 0
|
|
assert not mb.req_pend
|
|
assert mb.retry_cnt == 0
|
|
assert mb.send_calls == 4
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_recv_unknown_data():
|
|
'''Receive a response with an unknwon register'''
|
|
mb = ModbusTestHelper()
|
|
assert 0x9000 not in mb.mb_reg_mapping
|
|
mb.mb_reg_mapping[0x9000] = {'reg': Register.TEST_REG1, 'fmt': '!H', 'ratio': 1}
|
|
|
|
mb.build_msg(1,3,0x9000,2)
|
|
|
|
# check matching response, but with CRC error
|
|
call = 0
|
|
mb.set_node_id('test')
|
|
for key, update, val in mb.recv_resp(mb.db, b'\x01\x03\x04\x01\x2c\x00\x46\xbb\xf4'):
|
|
call += 1
|
|
assert mb.err == 0
|
|
assert 0 == call
|
|
assert not mb.req_pend
|
|
|
|
del mb.mb_reg_mapping[0x9000]
|
|
|
|
@pytest.mark.asyncio(loop_scope="session")
|
|
async def test_close():
|
|
'''Check queue handling for build_msg() calls'''
|
|
mb = ModbusTestHelper()
|
|
mb.build_msg(1,3,0x3007,6)
|
|
mb.build_msg(1,6,0x2008,4)
|
|
assert mb.que.qsize() == 1
|
|
mb.build_msg(1,3,0x3007,6)
|
|
assert mb.que.qsize() == 2
|
|
assert mb.que.empty() == False
|
|
mb.close()
|
|
assert mb.que.qsize() == 0
|
|
assert mb.que.empty() == True
|