class ModbusTransactionTest(unittest.TestCase):
'''
This is the unittest for the pymodbus.transaction module
'''
#---------------------------------------------------------------------------#
# Test Construction
#---------------------------------------------------------------------------#
def setUp(self):
''' Sets up the test environment '''
self.client = None
self.decoder = ServerDecoder()
self._tcp = ModbusSocketFramer(decoder=self.decoder)
self._rtu = ModbusRtuFramer(decoder=self.decoder)
self._ascii = ModbusAsciiFramer(decoder=self.decoder)
self._binary = ModbusBinaryFramer(decoder=self.decoder)
self._manager = DictTransactionManager(self.client)
self._queue_manager = FifoTransactionManager(self.client)
self._tm = ModbusTransactionManager(self.client)
def tearDown(self):
''' Cleans up the test environment '''
del self._manager
del self._tcp
del self._rtu
del self._ascii
#---------------------------------------------------------------------------#
# Dictionary based transaction manager
#---------------------------------------------------------------------------#
def testDictTransactionManagerTID(self):
''' Test the dict transaction manager TID '''
for tid in range(1, self._manager.getNextTID() + 10):
self.assertEqual(tid + 1, self._manager.getNextTID())
self._manager.reset()
self.assertEqual(1, self._manager.getNextTID())
def testGetDictTransactionManagerTransaction(self):
''' Test the dict transaction manager '''
class Request:
pass
self._manager.reset()
handle = Request()
handle.transaction_id = self._manager.getNextTID()
handle.message = b"testing"
self._manager.addTransaction(handle)
result = self._manager.getTransaction(handle.transaction_id)
self.assertEqual(handle.message, result.message)
def testDeleteDictTransactionManagerTransaction(self):
''' Test the dict transaction manager '''
class Request:
pass
self._manager.reset()
handle = Request()
handle.transaction_id = self._manager.getNextTID()
handle.message = b"testing"
self._manager.addTransaction(handle)
self._manager.delTransaction(handle.transaction_id)
self.assertEqual(None,
self._manager.getTransaction(handle.transaction_id))
#---------------------------------------------------------------------------#
# Queue based transaction manager
#---------------------------------------------------------------------------#
def testFifoTransactionManagerTID(self):
''' Test the fifo transaction manager TID '''
for tid in range(1, self._queue_manager.getNextTID() + 10):
self.assertEqual(tid + 1, self._queue_manager.getNextTID())
self._queue_manager.reset()
self.assertEqual(1, self._queue_manager.getNextTID())
def testGetFifoTransactionManagerTransaction(self):
''' Test the fifo transaction manager '''
class Request:
pass
self._queue_manager.reset()
handle = Request()
handle.transaction_id = self._queue_manager.getNextTID()
handle.message = b"testing"
self._queue_manager.addTransaction(handle)
result = self._queue_manager.getTransaction(handle.transaction_id)
self.assertEqual(handle.message, result.message)
def testDeleteFifoTransactionManagerTransaction(self):
''' Test the fifo transaction manager '''
class Request:
pass
self._queue_manager.reset()
handle = Request()
handle.transaction_id = self._queue_manager.getNextTID()
handle.message = b"testing"
self._queue_manager.addTransaction(handle)
self._queue_manager.delTransaction(handle.transaction_id)
self.assertEqual(
None, self._queue_manager.getTransaction(handle.transaction_id))
#---------------------------------------------------------------------------#
# TCP tests
#---------------------------------------------------------------------------#
def testTCPFramerTransactionReady(self):
''' Test a tcp frame transaction '''
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self.assertFalse(self._tcp.isFrameReady())
self.assertFalse(self._tcp.checkFrame())
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.isFrameReady())
self.assertTrue(self._tcp.checkFrame())
self._tcp.advanceFrame()
self.assertFalse(self._tcp.isFrameReady())
self.assertFalse(self._tcp.checkFrame())
self.assertEqual(b'', self._ascii.getFrame())
def testTCPFramerTransactionFull(self):
''' Test a full tcp frame transaction '''
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg[7:], result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf(self):
''' Test a half completed tcp frame transaction '''
msg1 = b"\x00\x01\x12\x34\x00"
msg2 = b"\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2[2:], result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf2(self):
''' Test a half completed tcp frame transaction '''
msg1 = b"\x00\x01\x12\x34\x00\x04\xff"
msg2 = b"\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2, result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf3(self):
''' Test a half completed tcp frame transaction '''
msg1 = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12"
msg2 = b"\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg1[7:], result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg1[7:] + msg2, result)
self._tcp.advanceFrame()
def testTCPFramerTransactionShort(self):
''' Test that we can get back on track after an invalid message '''
msg1 = b"\x99\x99\x99\x99\x00\x01\x00\x01"
msg2 = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.advanceFrame()
self._tcp.addToFrame(msg2)
self.assertEqual(10, len(self._tcp._buffer))
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2[7:], result)
self._tcp.advanceFrame()
def testTCPFramerPopulate(self):
''' Test a tcp frame packet build '''
expected = ModbusRequest()
expected.transaction_id = 0x0001
expected.protocol_id = 0x1234
expected.unit_id = 0xff
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.checkFrame())
actual = ModbusRequest()
self._tcp.populateResult(actual)
for name in ['transaction_id', 'protocol_id', 'unit_id']:
self.assertEqual(getattr(expected, name), getattr(actual, name))
self._tcp.advanceFrame()
def testTCPFramerPacket(self):
''' Test a tcp frame packet build '''
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.transaction_id = 0x0001
message.protocol_id = 0x1234
message.unit_id = 0xff
message.function_code = 0x01
expected = b"\x00\x01\x12\x34\x00\x02\xff\x01"
actual = self._tcp.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
#---------------------------------------------------------------------------#
# RTU tests
#---------------------------------------------------------------------------#
def testRTUFramerTransactionReady(self):
''' Test if the checks for a complete frame work '''
self.assertFalse(self._rtu.isFrameReady())
msg_parts = [b"\x00\x01\x00", b"\x00\x00\x01\xfc\x1b"]
self._rtu.addToFrame(msg_parts[0])
self.assertTrue(self._rtu.isFrameReady())
self.assertFalse(self._rtu.checkFrame())
self._rtu.addToFrame(msg_parts[1])
self.assertTrue(self._rtu.isFrameReady())
self.assertTrue(self._rtu.checkFrame())
def testRTUFramerTransactionFull(self):
''' Test a full rtu frame transaction '''
msg = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
stripped_msg = msg[1:-2]
self._rtu.addToFrame(msg)
self.assertTrue(self._rtu.checkFrame())
result = self._rtu.getFrame()
self.assertEqual(stripped_msg, result)
self._rtu.advanceFrame()
def testRTUFramerTransactionHalf(self):
''' Test a half completed rtu frame transaction '''
msg_parts = [b"\x00\x01\x00", b"\x00\x00\x01\xfc\x1b"]
stripped_msg = b"".join(msg_parts)[1:-2]
self._rtu.addToFrame(msg_parts[0])
self.assertFalse(self._rtu.checkFrame())
self._rtu.addToFrame(msg_parts[1])
self.assertTrue(self._rtu.isFrameReady())
self.assertTrue(self._rtu.checkFrame())
result = self._rtu.getFrame()
self.assertEqual(stripped_msg, result)
self._rtu.advanceFrame()
def testRTUFramerPopulate(self):
''' Test a rtu frame packet build '''
request = ModbusRequest()
msg = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
self._rtu.addToFrame(msg)
self._rtu.populateHeader()
self._rtu.populateResult(request)
header_dict = self._rtu._header
self.assertEqual(len(msg), header_dict['len'])
self.assertEqual(byte2int(msg[0]), header_dict['uid'])
self.assertEqual(msg[-2:], header_dict['crc'])
self.assertEqual(0x00, request.unit_id)
def testRTUFramerPacket(self):
''' Test a rtu frame packet build '''
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b"\xff\x01\x81\x80" # only header + CRC - no data
actual = self._rtu.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testRTUDecodeException(self):
''' Test that the RTU framer can decode errors '''
message = b"\x00\x90\x02\x9c\x01"
actual = self._rtu.addToFrame(message)
result = self._rtu.checkFrame()
self.assertTrue(result)
def testProcess(self):
class MockResult(object):
def __init__(self, code):
self.function_code = code
def mock_callback(self):
pass
mock_result = MockResult(code=0)
self._rtu.getRawFrame = self._rtu.getFrame = MagicMock()
self._rtu.decoder = MagicMock()
self._rtu.decoder.decode = MagicMock(return_value=mock_result)
self._rtu.populateResult = MagicMock()
self._rtu.advanceFrame = MagicMock()
self._rtu._process(mock_callback)
self._rtu.populateResult.assert_called_with(mock_result)
self._rtu.advanceFrame.assert_called_with()
self.assertTrue(self._rtu.advanceFrame.called)
#Check errors
self._rtu.decoder.decode = MagicMock(return_value=None)
self.assertRaises(ModbusIOException,
lambda: self._rtu._process(mock_callback))
def testRTUProcessIncomingPAkcets(self):
mock_data = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
def mock_callback(self):
pass
self._rtu.addToFrame = MagicMock()
self._rtu._process = MagicMock()
self._rtu.isFrameReady = MagicMock(return_value=False)
self._rtu._buffer = mock_data
self._rtu.processIncomingPacket(mock_data, mock_callback)
#---------------------------------------------------------------------------#
# ASCII tests
#---------------------------------------------------------------------------#
def testASCIIFramerTransactionReady(self):
''' Test a ascii frame transaction '''
msg = b':F7031389000A60\r\n'
self.assertFalse(self._ascii.isFrameReady())
self.assertFalse(self._ascii.checkFrame())
self._ascii.addToFrame(msg)
self.assertTrue(self._ascii.isFrameReady())
self.assertTrue(self._ascii.checkFrame())
self._ascii.advanceFrame()
self.assertFalse(self._ascii.isFrameReady())
self.assertFalse(self._ascii.checkFrame())
self.assertEqual(b'', self._ascii.getFrame())
def testASCIIFramerTransactionFull(self):
''' Test a full ascii frame transaction '''
msg = b'sss:F7031389000A60\r\n'
pack = a2b_hex(msg[6:-4])
self._ascii.addToFrame(msg)
self.assertTrue(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(pack, result)
self._ascii.advanceFrame()
def testASCIIFramerTransactionHalf(self):
''' Test a half completed ascii frame transaction '''
msg1 = b'sss:F7031389'
msg2 = b'000A60\r\n'
pack = a2b_hex(msg1[6:] + msg2[:-4])
self._ascii.addToFrame(msg1)
self.assertFalse(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(b'', result)
self._ascii.addToFrame(msg2)
self.assertTrue(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(pack, result)
self._ascii.advanceFrame()
def testASCIIFramerPopulate(self):
''' Test a ascii frame packet build '''
request = ModbusRequest()
self._ascii.populateResult(request)
self.assertEqual(0x00, request.unit_id)
def testASCIIFramerPacket(self):
''' Test a ascii frame packet build '''
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b":FF0100\r\n"
actual = self._ascii.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testAsciiProcessIncomingPakcets(self):
mock_data = msg = b':F7031389000A60\r\n'
def mock_callback(mock_data):
pass
self._ascii.processIncomingPacket(mock_data, mock_callback)
# Test failure:
self._ascii.checkFrame = MagicMock(return_value=False)
self._ascii.processIncomingPacket(mock_data, mock_callback)
#---------------------------------------------------------------------------#
# Binary tests
#---------------------------------------------------------------------------#
def testBinaryFramerTransactionReady(self):
''' Test a binary frame transaction '''
msg = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
self.assertFalse(self._binary.isFrameReady())
self.assertFalse(self._binary.checkFrame())
self._binary.addToFrame(msg)
self.assertTrue(self._binary.isFrameReady())
self.assertTrue(self._binary.checkFrame())
self._binary.advanceFrame()
self.assertFalse(self._binary.isFrameReady())
self.assertFalse(self._binary.checkFrame())
self.assertEqual(b'', self._binary.getFrame())
def testBinaryFramerTransactionFull(self):
''' Test a full binary frame transaction '''
msg = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
pack = msg[2:-3]
self._binary.addToFrame(msg)
self.assertTrue(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(pack, result)
self._binary.advanceFrame()
def testBinaryFramerTransactionHalf(self):
''' Test a half completed binary frame transaction '''
msg1 = b'\x7b\x01\x03\x00'
msg2 = b'\x00\x00\x05\x85\xC9\x7d'
pack = msg1[2:] + msg2[:-3]
self._binary.addToFrame(msg1)
self.assertFalse(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(b'', result)
self._binary.addToFrame(msg2)
self.assertTrue(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(pack, result)
self._binary.advanceFrame()
def testBinaryFramerPopulate(self):
''' Test a binary frame packet build '''
request = ModbusRequest()
self._binary.populateResult(request)
self.assertEqual(0x00, request.unit_id)
def testBinaryFramerPacket(self):
''' Test a binary frame packet build '''
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b'\x7b\xff\x01\x81\x80\x7d'
actual = self._binary.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testBinaryProcessIncomingPacket(self):
mock_data = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
def mock_callback(mock_data):
pass
self._binary.processIncomingPacket(mock_data, mock_callback)
# Test failure:
self._binary.checkFrame = MagicMock(return_value=False)
self._binary.processIncomingPacket(mock_data, mock_callback)
class ModbusTransactionTest(unittest.TestCase):
"""
This is the unittest for the pymodbus.transaction module
"""
# ----------------------------------------------------------------------- #
# Test Construction
# ----------------------------------------------------------------------- #
def setUp(self):
""" Sets up the test environment """
self.client = None
self.decoder = ServerDecoder()
self._tcp = ModbusSocketFramer(decoder=self.decoder, client=None)
self._tls = ModbusTlsFramer(decoder=self.decoder, client=None)
self._rtu = ModbusRtuFramer(decoder=self.decoder, client=None)
self._ascii = ModbusAsciiFramer(decoder=self.decoder, client=None)
self._binary = ModbusBinaryFramer(decoder=self.decoder, client=None)
self._manager = DictTransactionManager(self.client)
self._queue_manager = FifoTransactionManager(self.client)
self._tm = ModbusTransactionManager(self.client)
def tearDown(self):
""" Cleans up the test environment """
del self._manager
del self._tcp
del self._tls
del self._rtu
del self._ascii
# ----------------------------------------------------------------------- #
# Base transaction manager
# ----------------------------------------------------------------------- #
def testCalculateExpectedResponseLength(self):
self._tm.client = MagicMock()
self._tm.client.framer = MagicMock()
self._tm._set_adu_size()
self.assertEqual(self._tm._calculate_response_length(0), None)
self._tm.base_adu_size = 10
self.assertEqual(self._tm._calculate_response_length(5), 15)
def testCalculateExceptionLength(self):
for framer, exception_length in [('ascii', 11),
('binary', 7),
('rtu', 5),
('tcp', 9),
('tls', 2),
('dummy', None)]:
self._tm.client = MagicMock()
if framer == "ascii":
self._tm.client.framer = self._ascii
elif framer == "binary":
self._tm.client.framer = self._binary
elif framer == "rtu":
self._tm.client.framer = self._rtu
elif framer == "tcp":
self._tm.client.framer = self._tcp
elif framer == "tls":
self._tm.client.framer = self._tls
else:
self._tm.client.framer = MagicMock()
self._tm._set_adu_size()
self.assertEqual(self._tm._calculate_exception_length(),
exception_length)
def testExecute(self):
client = MagicMock()
client.framer = self._ascii
client.framer._buffer = b'deadbeef'
client.framer.processIncomingPacket = MagicMock()
client.framer.processIncomingPacket.return_value = None
client.framer.buildPacket = MagicMock()
client.framer.buildPacket.return_value = b'deadbeef'
client.framer.sendPacket = MagicMock()
client.framer.sendPacket.return_value = len(b'deadbeef')
request = MagicMock()
request.get_response_pdu_size.return_value = 10
request.unit_id = 1
tm = ModbusTransactionManager(client)
tm._recv = MagicMock(return_value=b'abcdef')
self.assertEqual(tm.retries, 3)
self.assertEqual(tm.retry_on_empty, False)
# tm._transact = MagicMock()
# some response
# tm._transact.return_value = (b'abcdef', None)
tm.getTransaction = MagicMock()
tm.getTransaction.return_value = 'response'
response = tm.execute(request)
self.assertEqual(response, 'response')
# No response
tm._recv = MagicMock(return_value=b'abcdef')
# tm._transact.return_value = (b'', None)
tm.transactions = []
tm.getTransaction = MagicMock()
tm.getTransaction.return_value = None
response = tm.execute(request)
self.assertIsInstance(response, ModbusIOException)
# No response with retries
tm.retry_on_empty = True
tm._recv = MagicMock(side_effect=iter([b'', b'abcdef']))
# tm._transact.side_effect = [(b'', None), (b'abcdef', None)]
response = tm.execute(request)
self.assertIsInstance(response, ModbusIOException)
# retry on invalid response
tm.retry_on_invalid = True
tm._recv = MagicMock(side_effect=iter([b'', b'abcdef', b'deadbe', b'123456']))
# tm._transact.side_effect = [(b'', None), (b'abcdef', None)]
response = tm.execute(request)
self.assertIsInstance(response, ModbusIOException)
# Unable to decode response
tm._recv = MagicMock(side_effect=ModbusIOException())
# tm._transact.side_effect = [(b'abcdef', None)]
client.framer.processIncomingPacket.side_effect = MagicMock(side_effect=ModbusIOException())
self.assertIsInstance(tm.execute(request), ModbusIOException)
# ----------------------------------------------------------------------- #
# Dictionary based transaction manager
# ----------------------------------------------------------------------- #
def testDictTransactionManagerTID(self):
""" Test the dict transaction manager TID """
for tid in range(1, self._manager.getNextTID() + 10):
self.assertEqual(tid+1, self._manager.getNextTID())
self._manager.reset()
self.assertEqual(1, self._manager.getNextTID())
def testGetDictTransactionManagerTransaction(self):
""" Test the dict transaction manager """
class Request: pass
self._manager.reset()
handle = Request()
handle.transaction_id = self._manager.getNextTID()
handle.message = b"testing"
self._manager.addTransaction(handle)
result = self._manager.getTransaction(handle.transaction_id)
self.assertEqual(handle.message, result.message)
def testDeleteDictTransactionManagerTransaction(self):
""" Test the dict transaction manager """
class Request: pass
self._manager.reset()
handle = Request()
handle.transaction_id = self._manager.getNextTID()
handle.message = b"testing"
self._manager.addTransaction(handle)
self._manager.delTransaction(handle.transaction_id)
self.assertEqual(None, self._manager.getTransaction(handle.transaction_id))
# ----------------------------------------------------------------------- #
# Queue based transaction manager
# ----------------------------------------------------------------------- #
def testFifoTransactionManagerTID(self):
""" Test the fifo transaction manager TID """
for tid in range(1, self._queue_manager.getNextTID() + 10):
self.assertEqual(tid+1, self._queue_manager.getNextTID())
self._queue_manager.reset()
self.assertEqual(1, self._queue_manager.getNextTID())
def testGetFifoTransactionManagerTransaction(self):
""" Test the fifo transaction manager """
class Request: pass
self._queue_manager.reset()
handle = Request()
handle.transaction_id = self._queue_manager.getNextTID()
handle.message = b"testing"
self._queue_manager.addTransaction(handle)
result = self._queue_manager.getTransaction(handle.transaction_id)
self.assertEqual(handle.message, result.message)
def testDeleteFifoTransactionManagerTransaction(self):
""" Test the fifo transaction manager """
class Request: pass
self._queue_manager.reset()
handle = Request()
handle.transaction_id = self._queue_manager.getNextTID()
handle.message = b"testing"
self._queue_manager.addTransaction(handle)
self._queue_manager.delTransaction(handle.transaction_id)
self.assertEqual(None, self._queue_manager.getTransaction(handle.transaction_id))
# ----------------------------------------------------------------------- #
# TCP tests
# ----------------------------------------------------------------------- #
def testTCPFramerTransactionReady(self):
""" Test a tcp frame transaction """
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self.assertFalse(self._tcp.isFrameReady())
self.assertFalse(self._tcp.checkFrame())
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.isFrameReady())
self.assertTrue(self._tcp.checkFrame())
self._tcp.advanceFrame()
self.assertFalse(self._tcp.isFrameReady())
self.assertFalse(self._tcp.checkFrame())
self.assertEqual(b'', self._ascii.getFrame())
def testTCPFramerTransactionFull(self):
""" Test a full tcp frame transaction """
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg[7:], result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf(self):
""" Test a half completed tcp frame transaction """
msg1 = b"\x00\x01\x12\x34\x00"
msg2 = b"\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2[2:], result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf2(self):
""" Test a half completed tcp frame transaction """
msg1 = b"\x00\x01\x12\x34\x00\x04\xff"
msg2 = b"\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2, result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf3(self):
""" Test a half completed tcp frame transaction """
msg1 = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12"
msg2 = b"\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg1[7:], result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg1[7:] + msg2, result)
self._tcp.advanceFrame()
def testTCPFramerTransactionShort(self):
""" Test that we can get back on track after an invalid message """
msg1 = b"\x99\x99\x99\x99\x00\x01\x00\x01"
msg2 = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.advanceFrame()
self._tcp.addToFrame(msg2)
self.assertEqual(10, len(self._tcp._buffer))
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2[7:], result)
self._tcp.advanceFrame()
def testTCPFramerPopulate(self):
""" Test a tcp frame packet build """
expected = ModbusRequest()
expected.transaction_id = 0x0001
expected.protocol_id = 0x1234
expected.unit_id = 0xff
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.checkFrame())
actual = ModbusRequest()
self._tcp.populateResult(actual)
for name in ['transaction_id', 'protocol_id', 'unit_id']:
self.assertEqual(getattr(expected, name), getattr(actual, name))
self._tcp.advanceFrame()
def testTCPFramerPacket(self):
""" Test a tcp frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.transaction_id = 0x0001
message.protocol_id = 0x1234
message.unit_id = 0xff
message.function_code = 0x01
expected = b"\x00\x01\x12\x34\x00\x02\xff\x01"
actual = self._tcp.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
# ----------------------------------------------------------------------- #
# TLS tests
# ----------------------------------------------------------------------- #
def testTLSFramerTransactionReady(self):
""" Test a tls frame transaction """
msg = b"\x01\x12\x34\x00\x08"
self.assertFalse(self._tls.isFrameReady())
self.assertFalse(self._tls.checkFrame())
self._tls.addToFrame(msg)
self.assertTrue(self._tls.isFrameReady())
self.assertTrue(self._tls.checkFrame())
self._tls.advanceFrame()
self.assertFalse(self._tls.isFrameReady())
self.assertFalse(self._tls.checkFrame())
self.assertEqual(b'', self._tls.getFrame())
def testTLSFramerTransactionFull(self):
""" Test a full tls frame transaction """
msg = b"\x01\x12\x34\x00\x08"
self._tls.addToFrame(msg)
self.assertTrue(self._tls.checkFrame())
result = self._tls.getFrame()
self.assertEqual(msg[0:], result)
self._tls.advanceFrame()
def testTLSFramerTransactionHalf(self):
""" Test a half completed tls frame transaction """
msg1 = b""
msg2 = b"\x01\x12\x34\x00\x08"
self._tls.addToFrame(msg1)
self.assertFalse(self._tls.checkFrame())
result = self._tls.getFrame()
self.assertEqual(b'', result)
self._tls.addToFrame(msg2)
self.assertTrue(self._tls.checkFrame())
result = self._tls.getFrame()
self.assertEqual(msg2[0:], result)
self._tls.advanceFrame()
def testTLSFramerTransactionShort(self):
""" Test that we can get back on track after an invalid message """
msg1 = b""
msg2 = b"\x01\x12\x34\x00\x08"
self._tls.addToFrame(msg1)
self.assertFalse(self._tls.checkFrame())
result = self._tls.getFrame()
self.assertEqual(b'', result)
self._tls.advanceFrame()
self._tls.addToFrame(msg2)
self.assertEqual(5, len(self._tls._buffer))
self.assertTrue(self._tls.checkFrame())
result = self._tls.getFrame()
self.assertEqual(msg2[0:], result)
self._tls.advanceFrame()
def testTLSFramerDecode(self):
""" Testmessage decoding """
msg1 = b""
msg2 = b"\x01\x12\x34\x00\x08"
result = self._tls.decode_data(msg1)
self.assertEqual(dict(), result);
result = self._tls.decode_data(msg2)
self.assertEqual(dict(fcode=1), result);
self._tls.advanceFrame()
def testTLSIncomingPacket(self):
msg = b"\x01\x12\x34\x00\x08"
unit = 0x01
def mock_callback(self):
pass
self._tls._process = MagicMock()
self._tls.isFrameReady = MagicMock(return_value=False)
self._tls.processIncomingPacket(msg, mock_callback, unit)
self.assertEqual(msg, self._tls.getRawFrame())
self._tls.advanceFrame()
self._tls.isFrameReady = MagicMock(return_value=True)
self._tls._validate_unit_id = MagicMock(return_value=False)
self._tls.processIncomingPacket(msg, mock_callback, unit)
self.assertEqual(b'', self._tls.getRawFrame())
self._tls.advanceFrame()
self._tls._validate_unit_id = MagicMock(return_value=True)
self._tls.processIncomingPacket(msg, mock_callback, unit)
self.assertEqual(msg, self._tls.getRawFrame())
self._tls.advanceFrame()
def testTLSProcess(self):
class MockResult(object):
def __init__(self, code):
self.function_code = code
def mock_callback(self):
pass
self._tls.decoder.decode = MagicMock(return_value=None)
self.assertRaises(ModbusIOException,
lambda: self._tls._process(mock_callback))
result = MockResult(0x01)
self._tls.decoder.decode = MagicMock(return_value=result)
self.assertRaises(InvalidMessageReceivedException,
lambda: self._tls._process(mock_callback, error=True))
self._tls._process(mock_callback)
self.assertEqual(b'', self._tls.getRawFrame())
def testTLSFramerPopulate(self):
""" Test a tls frame packet build """
expected = ModbusRequest()
msg = b"\x01\x12\x34\x00\x08"
self._tls.addToFrame(msg)
self.assertTrue(self._tls.checkFrame())
actual = ModbusRequest()
result = self._tls.populateResult(actual)
self.assertEqual(None, result)
self._tls.advanceFrame()
def testTLSFramerPacket(self):
""" Test a tls frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.function_code = 0x01
expected = b"\x01"
actual = self._tls.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
# ----------------------------------------------------------------------- #
# RTU tests
# ----------------------------------------------------------------------- #
def testRTUFramerTransactionReady(self):
""" Test if the checks for a complete frame work """
self.assertFalse(self._rtu.isFrameReady())
msg_parts = [b"\x00\x01\x00", b"\x00\x00\x01\xfc\x1b"]
self._rtu.addToFrame(msg_parts[0])
self.assertTrue(self._rtu.isFrameReady())
self.assertFalse(self._rtu.checkFrame())
self._rtu.addToFrame(msg_parts[1])
self.assertTrue(self._rtu.isFrameReady())
self.assertTrue(self._rtu.checkFrame())
def testRTUFramerTransactionFull(self):
""" Test a full rtu frame transaction """
msg = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
stripped_msg = msg[1:-2]
self._rtu.addToFrame(msg)
self.assertTrue(self._rtu.checkFrame())
result = self._rtu.getFrame()
self.assertEqual(stripped_msg, result)
self._rtu.advanceFrame()
def testRTUFramerTransactionHalf(self):
""" Test a half completed rtu frame transaction """
msg_parts = [b"\x00\x01\x00", b"\x00\x00\x01\xfc\x1b"]
stripped_msg = b"".join(msg_parts)[1:-2]
self._rtu.addToFrame(msg_parts[0])
self.assertFalse(self._rtu.checkFrame())
self._rtu.addToFrame(msg_parts[1])
self.assertTrue(self._rtu.isFrameReady())
self.assertTrue(self._rtu.checkFrame())
result = self._rtu.getFrame()
self.assertEqual(stripped_msg, result)
self._rtu.advanceFrame()
def testRTUFramerPopulate(self):
""" Test a rtu frame packet build """
request = ModbusRequest()
msg = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
self._rtu.addToFrame(msg)
self._rtu.populateHeader()
self._rtu.populateResult(request)
header_dict = self._rtu._header
self.assertEqual(len(msg), header_dict['len'])
self.assertEqual(byte2int(msg[0]), header_dict['uid'])
self.assertEqual(msg[-2:], header_dict['crc'])
self.assertEqual(0x00, request.unit_id)
def testRTUFramerPacket(self):
""" Test a rtu frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b"\xff\x01\x81\x80" # only header + CRC - no data
actual = self._rtu.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testRTUDecodeException(self):
""" Test that the RTU framer can decode errors """
message = b"\x00\x90\x02\x9c\x01"
actual = self._rtu.addToFrame(message)
result = self._rtu.checkFrame()
self.assertTrue(result)
def testProcess(self):
class MockResult(object):
def __init__(self, code):
self.function_code = code
def mock_callback(self):
pass
mock_result = MockResult(code=0)
self._rtu.getRawFrame = self._rtu.getFrame = MagicMock()
self._rtu.decoder = MagicMock()
self._rtu.decoder.decode = MagicMock(return_value=mock_result)
self._rtu.populateResult = MagicMock()
self._rtu.advanceFrame = MagicMock()
self._rtu._process(mock_callback)
self._rtu.populateResult.assert_called_with(mock_result)
self._rtu.advanceFrame.assert_called_with()
self.assertTrue(self._rtu.advanceFrame.called)
#Check errors
self._rtu.decoder.decode = MagicMock(return_value=None)
self.assertRaises(ModbusIOException, lambda: self._rtu._process(mock_callback))
def testRTUProcessIncomingPAkcets(self):
mock_data = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
unit = 0x00
def mock_callback(self):
pass
self._rtu.addToFrame = MagicMock()
self._rtu._process = MagicMock()
self._rtu.isFrameReady = MagicMock(return_value=False)
self._rtu._buffer = mock_data
self._rtu.processIncomingPacket(mock_data, mock_callback, unit)
# ----------------------------------------------------------------------- #
# ASCII tests
# ----------------------------------------------------------------------- #
def testASCIIFramerTransactionReady(self):
""" Test a ascii frame transaction """
msg = b':F7031389000A60\r\n'
self.assertFalse(self._ascii.isFrameReady())
self.assertFalse(self._ascii.checkFrame())
self._ascii.addToFrame(msg)
self.assertTrue(self._ascii.isFrameReady())
self.assertTrue(self._ascii.checkFrame())
self._ascii.advanceFrame()
self.assertFalse(self._ascii.isFrameReady())
self.assertFalse(self._ascii.checkFrame())
self.assertEqual(b'', self._ascii.getFrame())
def testASCIIFramerTransactionFull(self):
""" Test a full ascii frame transaction """
msg = b'sss:F7031389000A60\r\n'
pack = a2b_hex(msg[6:-4])
self._ascii.addToFrame(msg)
self.assertTrue(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(pack, result)
self._ascii.advanceFrame()
def testASCIIFramerTransactionHalf(self):
""" Test a half completed ascii frame transaction """
msg1 = b'sss:F7031389'
msg2 = b'000A60\r\n'
pack = a2b_hex(msg1[6:] + msg2[:-4])
self._ascii.addToFrame(msg1)
self.assertFalse(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(b'', result)
self._ascii.addToFrame(msg2)
self.assertTrue(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(pack, result)
self._ascii.advanceFrame()
def testASCIIFramerPopulate(self):
""" Test a ascii frame packet build """
request = ModbusRequest()
self._ascii.populateResult(request)
self.assertEqual(0x00, request.unit_id)
def testASCIIFramerPacket(self):
""" Test a ascii frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b":FF0100\r\n"
actual = self._ascii.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testAsciiProcessIncomingPakcets(self):
mock_data = msg = b':F7031389000A60\r\n'
unit = 0x00
def mock_callback(mock_data, *args, **kwargs):
pass
self._ascii.processIncomingPacket(mock_data, mock_callback, unit)
# Test failure:
self._ascii.checkFrame = MagicMock(return_value=False)
self._ascii.processIncomingPacket(mock_data, mock_callback, unit)
# ----------------------------------------------------------------------- #
# Binary tests
# ----------------------------------------------------------------------- #
def testBinaryFramerTransactionReady(self):
""" Test a binary frame transaction """
msg = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
self.assertFalse(self._binary.isFrameReady())
self.assertFalse(self._binary.checkFrame())
self._binary.addToFrame(msg)
self.assertTrue(self._binary.isFrameReady())
self.assertTrue(self._binary.checkFrame())
self._binary.advanceFrame()
self.assertFalse(self._binary.isFrameReady())
self.assertFalse(self._binary.checkFrame())
self.assertEqual(b'', self._binary.getFrame())
def testBinaryFramerTransactionFull(self):
""" Test a full binary frame transaction """
msg = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
pack = msg[2:-3]
self._binary.addToFrame(msg)
self.assertTrue(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(pack, result)
self._binary.advanceFrame()
def testBinaryFramerTransactionHalf(self):
""" Test a half completed binary frame transaction """
msg1 = b'\x7b\x01\x03\x00'
msg2 = b'\x00\x00\x05\x85\xC9\x7d'
pack = msg1[2:] + msg2[:-3]
self._binary.addToFrame(msg1)
self.assertFalse(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(b'', result)
self._binary.addToFrame(msg2)
self.assertTrue(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(pack, result)
self._binary.advanceFrame()
def testBinaryFramerPopulate(self):
""" Test a binary frame packet build """
request = ModbusRequest()
self._binary.populateResult(request)
self.assertEqual(0x00, request.unit_id)
def testBinaryFramerPacket(self):
""" Test a binary frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b'\x7b\xff\x01\x81\x80\x7d'
actual = self._binary.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testBinaryProcessIncomingPacket(self):
mock_data = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
unit = 0x00
def mock_callback(mock_data):
pass
self._binary.processIncomingPacket(mock_data, mock_callback, unit)
# Test failure:
self._binary.checkFrame = MagicMock(return_value=False)
self._binary.processIncomingPacket(mock_data, mock_callback, unit)
class ModbusTransactionTest(unittest.TestCase):
"""
This is the unittest for the pymodbus.transaction module
"""
# ----------------------------------------------------------------------- #
# Test Construction
# ----------------------------------------------------------------------- #
def setUp(self):
""" Sets up the test environment """
self.client = None
self.decoder = ServerDecoder()
self._tcp = ModbusSocketFramer(decoder=self.decoder, client=None)
self._rtu = ModbusRtuFramer(decoder=self.decoder, client=None)
self._ascii = ModbusAsciiFramer(decoder=self.decoder, client=None)
self._binary = ModbusBinaryFramer(decoder=self.decoder, client=None)
self._manager = DictTransactionManager(self.client)
self._queue_manager = FifoTransactionManager(self.client)
self._tm = ModbusTransactionManager(self.client)
def tearDown(self):
""" Cleans up the test environment """
del self._manager
del self._tcp
del self._rtu
del self._ascii
# ----------------------------------------------------------------------- #
# Base transaction manager
# ----------------------------------------------------------------------- #
def testCalculateExpectedResponseLength(self):
self._tm.client = MagicMock()
self._tm.client.framer = MagicMock()
self._tm._set_adu_size()
self.assertEqual(self._tm._calculate_response_length(0), None)
self._tm.base_adu_size = 10
self.assertEqual(self._tm._calculate_response_length(5), 15)
def testCalculateExceptionLength(self):
for framer, exception_length in [('ascii', 11),
('binary', 7),
('rtu', 5),
('tcp', 9),
('dummy', None)]:
self._tm.client = MagicMock()
if framer == "ascii":
self._tm.client.framer = self._ascii
elif framer == "binary":
self._tm.client.framer = self._binary
elif framer == "rtu":
self._tm.client.framer = self._rtu
elif framer == "tcp":
self._tm.client.framer = self._tcp
else:
self._tm.client.framer = MagicMock()
self._tm._set_adu_size()
self.assertEqual(self._tm._calculate_exception_length(),
exception_length)
def testExecute(self):
client = MagicMock()
client.framer = self._ascii
client.framer._buffer = b'deadbeef'
client.framer.processIncomingPacket = MagicMock()
client.framer.processIncomingPacket.return_value = None
client.framer.buildPacket = MagicMock()
client.framer.buildPacket.return_value = b'deadbeef'
client.framer.sendPacket = MagicMock()
client.framer.sendPacket.return_value = len(b'deadbeef')
request = MagicMock()
request.get_response_pdu_size.return_value = 10
request.unit_id = 1
tm = ModbusTransactionManager(client)
tm._recv = MagicMock(return_value=b'abcdef')
self.assertEqual(tm.retries, 3)
self.assertEqual(tm.retry_on_empty, False)
# tm._transact = MagicMock()
# some response
# tm._transact.return_value = (b'abcdef', None)
tm.getTransaction = MagicMock()
tm.getTransaction.return_value = 'response'
response = tm.execute(request)
self.assertEqual(response, 'response')
# No response
tm._recv = MagicMock(return_value=b'abcdef')
# tm._transact.return_value = (b'', None)
tm.transactions = []
tm.getTransaction = MagicMock()
tm.getTransaction.return_value = None
response = tm.execute(request)
self.assertIsInstance(response, ModbusIOException)
# No response with retries
tm.retry_on_empty = True
tm._recv = MagicMock(side_effect=iter([b'', b'abcdef']))
# tm._transact.side_effect = [(b'', None), (b'abcdef', None)]
response = tm.execute(request)
self.assertIsInstance(response, ModbusIOException)
# Unable to decode response
tm._recv = MagicMock(side_effect=ModbusIOException())
# tm._transact.side_effect = [(b'abcdef', None)]
client.framer.processIncomingPacket.side_effect = MagicMock(side_effect=ModbusIOException())
self.assertIsInstance(tm.execute(request), ModbusIOException)
# ----------------------------------------------------------------------- #
# Dictionary based transaction manager
# ----------------------------------------------------------------------- #
def testDictTransactionManagerTID(self):
""" Test the dict transaction manager TID """
for tid in range(1, self._manager.getNextTID() + 10):
self.assertEqual(tid+1, self._manager.getNextTID())
self._manager.reset()
self.assertEqual(1, self._manager.getNextTID())
def testGetDictTransactionManagerTransaction(self):
""" Test the dict transaction manager """
class Request: pass
self._manager.reset()
handle = Request()
handle.transaction_id = self._manager.getNextTID()
handle.message = b"testing"
self._manager.addTransaction(handle)
result = self._manager.getTransaction(handle.transaction_id)
self.assertEqual(handle.message, result.message)
def testDeleteDictTransactionManagerTransaction(self):
""" Test the dict transaction manager """
class Request: pass
self._manager.reset()
handle = Request()
handle.transaction_id = self._manager.getNextTID()
handle.message = b"testing"
self._manager.addTransaction(handle)
self._manager.delTransaction(handle.transaction_id)
self.assertEqual(None, self._manager.getTransaction(handle.transaction_id))
# ----------------------------------------------------------------------- #
# Queue based transaction manager
# ----------------------------------------------------------------------- #
def testFifoTransactionManagerTID(self):
""" Test the fifo transaction manager TID """
for tid in range(1, self._queue_manager.getNextTID() + 10):
self.assertEqual(tid+1, self._queue_manager.getNextTID())
self._queue_manager.reset()
self.assertEqual(1, self._queue_manager.getNextTID())
def testGetFifoTransactionManagerTransaction(self):
""" Test the fifo transaction manager """
class Request: pass
self._queue_manager.reset()
handle = Request()
handle.transaction_id = self._queue_manager.getNextTID()
handle.message = b"testing"
self._queue_manager.addTransaction(handle)
result = self._queue_manager.getTransaction(handle.transaction_id)
self.assertEqual(handle.message, result.message)
def testDeleteFifoTransactionManagerTransaction(self):
""" Test the fifo transaction manager """
class Request: pass
self._queue_manager.reset()
handle = Request()
handle.transaction_id = self._queue_manager.getNextTID()
handle.message = b"testing"
self._queue_manager.addTransaction(handle)
self._queue_manager.delTransaction(handle.transaction_id)
self.assertEqual(None, self._queue_manager.getTransaction(handle.transaction_id))
# ----------------------------------------------------------------------- #
# TCP tests
# ----------------------------------------------------------------------- #
def testTCPFramerTransactionReady(self):
""" Test a tcp frame transaction """
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self.assertFalse(self._tcp.isFrameReady())
self.assertFalse(self._tcp.checkFrame())
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.isFrameReady())
self.assertTrue(self._tcp.checkFrame())
self._tcp.advanceFrame()
self.assertFalse(self._tcp.isFrameReady())
self.assertFalse(self._tcp.checkFrame())
self.assertEqual(b'', self._ascii.getFrame())
def testTCPFramerTransactionFull(self):
""" Test a full tcp frame transaction """
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg[7:], result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf(self):
""" Test a half completed tcp frame transaction """
msg1 = b"\x00\x01\x12\x34\x00"
msg2 = b"\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2[2:], result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf2(self):
""" Test a half completed tcp frame transaction """
msg1 = b"\x00\x01\x12\x34\x00\x04\xff"
msg2 = b"\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2, result)
self._tcp.advanceFrame()
def testTCPFramerTransactionHalf3(self):
""" Test a half completed tcp frame transaction """
msg1 = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12"
msg2 = b"\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg1[7:], result)
self._tcp.addToFrame(msg2)
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg1[7:] + msg2, result)
self._tcp.advanceFrame()
def testTCPFramerTransactionShort(self):
""" Test that we can get back on track after an invalid message """
msg1 = b"\x99\x99\x99\x99\x00\x01\x00\x01"
msg2 = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg1)
self.assertFalse(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(b'', result)
self._tcp.advanceFrame()
self._tcp.addToFrame(msg2)
self.assertEqual(10, len(self._tcp._buffer))
self.assertTrue(self._tcp.checkFrame())
result = self._tcp.getFrame()
self.assertEqual(msg2[7:], result)
self._tcp.advanceFrame()
def testTCPFramerPopulate(self):
""" Test a tcp frame packet build """
expected = ModbusRequest()
expected.transaction_id = 0x0001
expected.protocol_id = 0x1234
expected.unit_id = 0xff
msg = b"\x00\x01\x12\x34\x00\x04\xff\x02\x12\x34"
self._tcp.addToFrame(msg)
self.assertTrue(self._tcp.checkFrame())
actual = ModbusRequest()
self._tcp.populateResult(actual)
for name in ['transaction_id', 'protocol_id', 'unit_id']:
self.assertEqual(getattr(expected, name), getattr(actual, name))
self._tcp.advanceFrame()
def testTCPFramerPacket(self):
""" Test a tcp frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.transaction_id = 0x0001
message.protocol_id = 0x1234
message.unit_id = 0xff
message.function_code = 0x01
expected = b"\x00\x01\x12\x34\x00\x02\xff\x01"
actual = self._tcp.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
# ----------------------------------------------------------------------- #
# RTU tests
# ----------------------------------------------------------------------- #
def testRTUFramerTransactionReady(self):
""" Test if the checks for a complete frame work """
self.assertFalse(self._rtu.isFrameReady())
msg_parts = [b"\x00\x01\x00", b"\x00\x00\x01\xfc\x1b"]
self._rtu.addToFrame(msg_parts[0])
self.assertTrue(self._rtu.isFrameReady())
self.assertFalse(self._rtu.checkFrame())
self._rtu.addToFrame(msg_parts[1])
self.assertTrue(self._rtu.isFrameReady())
self.assertTrue(self._rtu.checkFrame())
def testRTUFramerTransactionFull(self):
""" Test a full rtu frame transaction """
msg = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
stripped_msg = msg[1:-2]
self._rtu.addToFrame(msg)
self.assertTrue(self._rtu.checkFrame())
result = self._rtu.getFrame()
self.assertEqual(stripped_msg, result)
self._rtu.advanceFrame()
def testRTUFramerTransactionHalf(self):
""" Test a half completed rtu frame transaction """
msg_parts = [b"\x00\x01\x00", b"\x00\x00\x01\xfc\x1b"]
stripped_msg = b"".join(msg_parts)[1:-2]
self._rtu.addToFrame(msg_parts[0])
self.assertFalse(self._rtu.checkFrame())
self._rtu.addToFrame(msg_parts[1])
self.assertTrue(self._rtu.isFrameReady())
self.assertTrue(self._rtu.checkFrame())
result = self._rtu.getFrame()
self.assertEqual(stripped_msg, result)
self._rtu.advanceFrame()
def testRTUFramerPopulate(self):
""" Test a rtu frame packet build """
request = ModbusRequest()
msg = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
self._rtu.addToFrame(msg)
self._rtu.populateHeader()
self._rtu.populateResult(request)
header_dict = self._rtu._header
self.assertEqual(len(msg), header_dict['len'])
self.assertEqual(byte2int(msg[0]), header_dict['uid'])
self.assertEqual(msg[-2:], header_dict['crc'])
self.assertEqual(0x00, request.unit_id)
def testRTUFramerPacket(self):
""" Test a rtu frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b"\xff\x01\x81\x80" # only header + CRC - no data
actual = self._rtu.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testRTUDecodeException(self):
""" Test that the RTU framer can decode errors """
message = b"\x00\x90\x02\x9c\x01"
actual = self._rtu.addToFrame(message)
result = self._rtu.checkFrame()
self.assertTrue(result)
def testProcess(self):
class MockResult(object):
def __init__(self, code):
self.function_code = code
def mock_callback(self):
pass
mock_result = MockResult(code=0)
self._rtu.getRawFrame = self._rtu.getFrame = MagicMock()
self._rtu.decoder = MagicMock()
self._rtu.decoder.decode = MagicMock(return_value=mock_result)
self._rtu.populateResult = MagicMock()
self._rtu.advanceFrame = MagicMock()
self._rtu._process(mock_callback)
self._rtu.populateResult.assert_called_with(mock_result)
self._rtu.advanceFrame.assert_called_with()
self.assertTrue(self._rtu.advanceFrame.called)
#Check errors
self._rtu.decoder.decode = MagicMock(return_value=None)
self.assertRaises(ModbusIOException, lambda: self._rtu._process(mock_callback))
def testRTUProcessIncomingPAkcets(self):
mock_data = b"\x00\x01\x00\x00\x00\x01\xfc\x1b"
unit = 0x00
def mock_callback(self):
pass
self._rtu.addToFrame = MagicMock()
self._rtu._process = MagicMock()
self._rtu.isFrameReady = MagicMock(return_value=False)
self._rtu._buffer = mock_data
self._rtu.processIncomingPacket(mock_data, mock_callback, unit)
# ----------------------------------------------------------------------- #
# ASCII tests
# ----------------------------------------------------------------------- #
def testASCIIFramerTransactionReady(self):
""" Test a ascii frame transaction """
msg = b':F7031389000A60\r\n'
self.assertFalse(self._ascii.isFrameReady())
self.assertFalse(self._ascii.checkFrame())
self._ascii.addToFrame(msg)
self.assertTrue(self._ascii.isFrameReady())
self.assertTrue(self._ascii.checkFrame())
self._ascii.advanceFrame()
self.assertFalse(self._ascii.isFrameReady())
self.assertFalse(self._ascii.checkFrame())
self.assertEqual(b'', self._ascii.getFrame())
def testASCIIFramerTransactionFull(self):
""" Test a full ascii frame transaction """
msg = b'sss:F7031389000A60\r\n'
pack = a2b_hex(msg[6:-4])
self._ascii.addToFrame(msg)
self.assertTrue(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(pack, result)
self._ascii.advanceFrame()
def testASCIIFramerTransactionHalf(self):
""" Test a half completed ascii frame transaction """
msg1 = b'sss:F7031389'
msg2 = b'000A60\r\n'
pack = a2b_hex(msg1[6:] + msg2[:-4])
self._ascii.addToFrame(msg1)
self.assertFalse(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(b'', result)
self._ascii.addToFrame(msg2)
self.assertTrue(self._ascii.checkFrame())
result = self._ascii.getFrame()
self.assertEqual(pack, result)
self._ascii.advanceFrame()
def testASCIIFramerPopulate(self):
""" Test a ascii frame packet build """
request = ModbusRequest()
self._ascii.populateResult(request)
self.assertEqual(0x00, request.unit_id)
def testASCIIFramerPacket(self):
""" Test a ascii frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b":FF0100\r\n"
actual = self._ascii.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testAsciiProcessIncomingPakcets(self):
mock_data = msg = b':F7031389000A60\r\n'
unit = 0x00
def mock_callback(mock_data, *args, **kwargs):
pass
self._ascii.processIncomingPacket(mock_data, mock_callback, unit)
# Test failure:
self._ascii.checkFrame = MagicMock(return_value=False)
self._ascii.processIncomingPacket(mock_data, mock_callback, unit)
# ----------------------------------------------------------------------- #
# Binary tests
# ----------------------------------------------------------------------- #
def testBinaryFramerTransactionReady(self):
""" Test a binary frame transaction """
msg = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
self.assertFalse(self._binary.isFrameReady())
self.assertFalse(self._binary.checkFrame())
self._binary.addToFrame(msg)
self.assertTrue(self._binary.isFrameReady())
self.assertTrue(self._binary.checkFrame())
self._binary.advanceFrame()
self.assertFalse(self._binary.isFrameReady())
self.assertFalse(self._binary.checkFrame())
self.assertEqual(b'', self._binary.getFrame())
def testBinaryFramerTransactionFull(self):
""" Test a full binary frame transaction """
msg = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
pack = msg[2:-3]
self._binary.addToFrame(msg)
self.assertTrue(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(pack, result)
self._binary.advanceFrame()
def testBinaryFramerTransactionHalf(self):
""" Test a half completed binary frame transaction """
msg1 = b'\x7b\x01\x03\x00'
msg2 = b'\x00\x00\x05\x85\xC9\x7d'
pack = msg1[2:] + msg2[:-3]
self._binary.addToFrame(msg1)
self.assertFalse(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(b'', result)
self._binary.addToFrame(msg2)
self.assertTrue(self._binary.checkFrame())
result = self._binary.getFrame()
self.assertEqual(pack, result)
self._binary.advanceFrame()
def testBinaryFramerPopulate(self):
""" Test a binary frame packet build """
request = ModbusRequest()
self._binary.populateResult(request)
self.assertEqual(0x00, request.unit_id)
def testBinaryFramerPacket(self):
""" Test a binary frame packet build """
old_encode = ModbusRequest.encode
ModbusRequest.encode = lambda self: b''
message = ModbusRequest()
message.unit_id = 0xff
message.function_code = 0x01
expected = b'\x7b\xff\x01\x81\x80\x7d'
actual = self._binary.buildPacket(message)
self.assertEqual(expected, actual)
ModbusRequest.encode = old_encode
def testBinaryProcessIncomingPacket(self):
mock_data = b'\x7b\x01\x03\x00\x00\x00\x05\x85\xC9\x7d'
unit = 0x00
def mock_callback(mock_data):
pass
self._binary.processIncomingPacket(mock_data, mock_callback, unit)
# Test failure:
self._binary.checkFrame = MagicMock(return_value=False)
self._binary.processIncomingPacket(mock_data, mock_callback, unit)
