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#!/usr/bin/env python
import unittest
import socket
import serial
from mock import patch, Mock
from twisted.test import test_protocols
from pymodbus.client.sync import ModbusTcpClient, ModbusUdpClient
from pymodbus.client.sync import ModbusSerialClient, BaseModbusClient
from pymodbus.exceptions import ConnectionException, NotImplementedException
from pymodbus.exceptions import ParameterException
from pymodbus.transaction import ModbusAsciiFramer, ModbusRtuFramer
from pymodbus.transaction import ModbusBinaryFramer
#---------------------------------------------------------------------------#
# Mock Classes
#---------------------------------------------------------------------------#
class mockSocket(object):
def close(self): return True
def recv(self, size): return '\x00'*size
def read(self, size): return '\x00'*size
def send(self, msg): return len(msg)
def write(self, msg): return len(msg)
def recvfrom(self, size): return ['\x00'*size]
def sendto(self, msg, *args): return len(msg)
#---------------------------------------------------------------------------#
# Fixture
#---------------------------------------------------------------------------#
class SynchronousClientTest(unittest.TestCase):
'''
This is the unittest for the pymodbus.client.sync module
'''
#-----------------------------------------------------------------------#
# Test Base Client
#-----------------------------------------------------------------------#
def testBaseModbusClient(self):
''' Test the base class for all the clients '''
client = BaseModbusClient(None)
client.transaction = None
self.assertRaises(NotImplementedException, lambda: client.connect())
self.assertRaises(NotImplementedException, lambda: client._send(None))
self.assertRaises(NotImplementedException, lambda: client._recv(None))
self.assertRaises(NotImplementedException, lambda: client.__enter__())
self.assertRaises(NotImplementedException, lambda: client.execute())
self.assertEquals("Null Transport", str(client))
client.close()
client.__exit__(0,0,0)
# a successful execute
client.connect = lambda: True
client.transaction = Mock(**{'execute.return_value': True})
self.assertEqual(client, client.__enter__())
self.assertTrue(client.execute())
# a unsuccessful connect
client.connect = lambda: False
self.assertRaises(ConnectionException, lambda: client.__enter__())
self.assertRaises(ConnectionException, lambda: client.execute())
#-----------------------------------------------------------------------#
# Test UDP Client
#-----------------------------------------------------------------------#
def testSyncUdpClientInstantiation(self):
client = ModbusUdpClient()
self.assertNotEqual(client, None)
def testBasicSyncUdpClient(self):
''' Test the basic methods for the udp sync client'''
# receive/send
client = ModbusUdpClient()
client.socket = mockSocket()
self.assertEqual(0, client._send(None))
self.assertEqual(1, client._send('\x00'))
self.assertEqual('\x00', client._recv(1))
# connect/disconnect
self.assertTrue(client.connect())
client.close()
# already closed socket
client.socket = False
client.close()
self.assertEqual("127.0.0.1:502", str(client))
def testUdpClientAddressFamily(self):
''' Test the Udp client get address family method'''
client = ModbusUdpClient()
self.assertEqual(socket.AF_INET, client._get_address_family('127.0.0.1'))
self.assertEqual(socket.AF_INET6, client._get_address_family('::1'))
def testUdpClientConnect(self):
''' Test the Udp client connection method'''
with patch.object(socket, 'socket') as mock_method:
class DummySocket(object):
def settimeout(self, *a, **kwa):
pass
mock_method.return_value = DummySocket()
client = ModbusUdpClient()
self.assertTrue(client.connect())
with patch.object(socket, 'socket') as mock_method:
mock_method.side_effect = socket.error()
client = ModbusUdpClient()
self.assertFalse(client.connect())
def testUdpClientSend(self):
''' Test the udp client send method'''
client = ModbusUdpClient()
self.assertRaises(ConnectionException, lambda: client._send(None))
client.socket = mockSocket()
self.assertEqual(0, client._send(None))
self.assertEqual(4, client._send('1234'))
def testUdpClientRecv(self):
''' Test the udp client receive method'''
client = ModbusUdpClient()
self.assertRaises(ConnectionException, lambda: client._recv(1024))
client.socket = mockSocket()
self.assertEqual('', client._recv(0))
self.assertEqual('\x00'*4, client._recv(4))
#-----------------------------------------------------------------------#
# Test TCP Client
#-----------------------------------------------------------------------#
def testSyncTcpClientInstantiation(self):
client = ModbusTcpClient()
self.assertNotEqual(client, None)
def testBasicSyncTcpClient(self):
''' Test the basic methods for the tcp sync client'''
# receive/send
client = ModbusTcpClient()
client.socket = mockSocket()
self.assertEqual(0, client._send(None))
self.assertEqual(1, client._send('\x00'))
self.assertEqual('\x00', client._recv(1))
# connect/disconnect
self.assertTrue(client.connect())
client.close()
# already closed socket
client.socket = False
client.close()
self.assertEqual("127.0.0.1:502", str(client))
def testTcpClientConnect(self):
''' Test the tcp client connection method'''
with patch.object(socket, 'create_connection') as mock_method:
mock_method.return_value = object()
client = ModbusTcpClient()
self.assertTrue(client.connect())
with patch.object(socket, 'create_connection') as mock_method:
mock_method.side_effect = socket.error()
client = ModbusTcpClient()
self.assertFalse(client.connect())
def testTcpClientSend(self):
''' Test the tcp client send method'''
client = ModbusTcpClient()
self.assertRaises(ConnectionException, lambda: client._send(None))
client.socket = mockSocket()
self.assertEqual(0, client._send(None))
self.assertEqual(4, client._send('1234'))
def testTcpClientRecv(self):
''' Test the tcp client receive method'''
client = ModbusTcpClient()
self.assertRaises(ConnectionException, lambda: client._recv(1024))
client.socket = mockSocket()
self.assertEqual('', client._recv(0))
self.assertEqual('\x00'*4, client._recv(4))
#-----------------------------------------------------------------------#
# Test Serial Client
#-----------------------------------------------------------------------#
def testSyncSerialClientInstantiation(self):
client = ModbusSerialClient()
self.assertNotEqual(client, None)
self.assertTrue(isinstance(ModbusSerialClient(method='ascii').framer, ModbusAsciiFramer))
self.assertTrue(isinstance(ModbusSerialClient(method='rtu').framer, ModbusRtuFramer))
self.assertTrue(isinstance(ModbusSerialClient(method='binary').framer, ModbusBinaryFramer))
self.assertRaises(ParameterException, lambda: ModbusSerialClient(method='something'))
def testBasicSyncSerialClient(self):
''' Test the basic methods for the serial sync client'''
# receive/send
client = ModbusSerialClient()
client.socket = mockSocket()
self.assertEqual(0, client._send(None))
self.assertEqual(1, client._send('\x00'))
self.assertEqual('\x00', client._recv(1))
# connect/disconnect
self.assertTrue(client.connect())
client.close()
# already closed socket
client.socket = False
client.close()
self.assertEqual('ascii baud[19200]', str(client))
def testSerialClientConnect(self):
''' Test the serial client connection method'''
with patch.object(serial, 'Serial') as mock_method:
mock_method.return_value = object()
client = ModbusSerialClient()
self.assertTrue(client.connect())
with patch.object(serial, 'Serial') as mock_method:
mock_method.side_effect = serial.SerialException()
client = ModbusSerialClient()
self.assertFalse(client.connect())
def testSerialClientSend(self):
''' Test the serial client send method'''
client = ModbusSerialClient()
self.assertRaises(ConnectionException, lambda: client._send(None))
client.socket = mockSocket()
self.assertEqual(0, client._send(None))
self.assertEqual(4, client._send('1234'))
def testSerialClientRecv(self):
''' Test the serial client receive method'''
client = ModbusSerialClient()
self.assertRaises(ConnectionException, lambda: client._recv(1024))
client.socket = mockSocket()
self.assertEqual('', client._recv(0))
self.assertEqual('\x00'*4, client._recv(4))
#---------------------------------------------------------------------------#
# Main
#---------------------------------------------------------------------------#
if __name__ == "__main__":
unittest.main()
|
