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#!/usr/bin/env python
'''
Bit Message Test Fixture
--------------------------------
This fixture tests the functionality of all the
bit based request/response messages:
* Read/Write Discretes
* Read Coils
'''
import unittest
from pymodbus.bit_write_message import *
from pymodbus.exceptions import *
from pymodbus.pdu import ModbusExceptions
from modbus_mocks import MockContext, FakeList
#---------------------------------------------------------------------------#
# Fixture
#---------------------------------------------------------------------------#
class ModbusBitMessageTests(unittest.TestCase):
#-----------------------------------------------------------------------#
# Setup/TearDown
#-----------------------------------------------------------------------#
def setUp(self):
'''
Initializes the test environment and builds request/result
encoding pairs
'''
pass
def tearDown(self):
''' Cleans up the test environment '''
pass
def testBitWriteBaseRequests(self):
messages = {
WriteSingleCoilRequest(1, 0xabcd) : '\x00\x01\xff\x00',
WriteSingleCoilResponse(1, 0xabcd) : '\x00\x01\xff\x00',
WriteMultipleCoilsRequest(1, [True]*5) : '\x00\x01\x00\x05\x01\x1f',
WriteMultipleCoilsResponse(1, 5) : '\x00\x01\x00\x05',
}
for request, expected in messages.iteritems():
self.assertEqual(request.encode(), expected)
def testWriteMultipleCoilsRequest(self):
request = WriteMultipleCoilsRequest(1, [True]*5)
request.decode('\x00\x01\x00\x05\x01\x1f')
self.assertEqual(request.byte_count, 1)
self.assertEqual(request.address, 1)
self.assertEqual(request.values, [True]*5)
def testInvalidWriteMultipleCoilsRequest(self):
request = WriteMultipleCoilsRequest(1, None)
self.assertEquals(request.values, [])
def testWriteSingleCoilRequestEncode(self):
request = WriteSingleCoilRequest(1, False)
self.assertEquals(request.encode(), '\x00\x01\x00\x00')
def testWriteSingleCoilExecute(self):
context = MockContext(False, default=True)
request = WriteSingleCoilRequest(2, True)
result = request.execute(context)
self.assertEqual(result.exception_code, ModbusExceptions.IllegalAddress)
context.valid = True
result = request.execute(context)
self.assertEqual(result.encode(), '\x00\x02\xff\x00')
context = MockContext(True, default=False)
request = WriteSingleCoilRequest(2, False)
result = request.execute(context)
self.assertEqual(result.encode(), '\x00\x02\x00\x00')
def testWriteMultipleCoilsExecute(self):
context = MockContext(False)
# too many values
request = WriteMultipleCoilsRequest(2, FakeList(0x123456))
result = request.execute(context)
self.assertEqual(result.exception_code, ModbusExceptions.IllegalValue)
# bad byte count
request = WriteMultipleCoilsRequest(2, [0x00]*4)
request.byte_count = 0x00
result = request.execute(context)
self.assertEqual(result.exception_code, ModbusExceptions.IllegalValue)
# does not validate
context.valid = False
request = WriteMultipleCoilsRequest(2, [0x00]*4)
result = request.execute(context)
self.assertEqual(result.exception_code, ModbusExceptions.IllegalAddress)
# validated request
context.valid = True
result = request.execute(context)
self.assertEqual(result.encode(), '\x00\x02\x00\x04')
def testWriteMultipleCoilsResponse(self):
response = WriteMultipleCoilsResponse()
response.decode('\x00\x80\x00\x08')
self.assertEqual(response.address, 0x80)
self.assertEqual(response.count, 0x08)
def testSerializingToString(self):
requests = [
WriteSingleCoilRequest(1, 0xabcd),
WriteSingleCoilResponse(1, 0xabcd),
WriteMultipleCoilsRequest(1, [True]*5),
WriteMultipleCoilsResponse(1, 5),
]
for request in requests:
self.assertTrue(str(request) != None)
#---------------------------------------------------------------------------#
# Main
#---------------------------------------------------------------------------#
if __name__ == "__main__":
unittest.main()
|
