public void UnicastMessage_SingleFailingException(Type exceptionType)
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Retries = 1;
transport.Write(null);
LastCall.IgnoreArguments().Repeat.Times(2);
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Do((ThrowExceptionDelegate) delegate { throw (Exception)Activator.CreateInstance(exceptionType); });
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Return(new ReadCoilsInputsResponse(Modbus.ReadCoils, 2, 1,
new DiscreteCollection(true, false, true, false, false, false, false, false)));
transport.OnValidateResponse(null, null);
LastCall.IgnoreArguments();
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadCoils, 2, 3, 4);
transport.UnicastMessage <ReadCoilsInputsResponse>(request);
mocks.VerifyAll();
}
public void UnicastMessage_AcknowlegeSlaveException()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
// set the wait to retry property to a small value so the test completes quickly
transport.WaitToRetryMilliseconds = 5;
transport.Write(null);
LastCall.IgnoreArguments();
// return a slave exception a greater number of times than number of retries to make sure we aren't just retrying
Expect.Call(transport.ReadResponse <ReadHoldingInputRegistersResponse>())
.Return(new SlaveExceptionResponse(1, Modbus.ReadHoldingRegisters + Modbus.ExceptionOffset, Modbus.Acknowledge))
.Repeat.Times(transport.Retries + 1);
Expect.Call(transport.ReadResponse <ReadHoldingInputRegistersResponse>())
.Return(new ReadHoldingInputRegistersResponse(Modbus.ReadHoldingRegisters, 1, new RegisterCollection(1)));
transport.Stub(x => x.OnValidateResponse(null, null))
.IgnoreArguments()
.Return(true);
mocks.ReplayAll();
ReadHoldingInputRegistersRequest request = new ReadHoldingInputRegistersRequest(Modbus.ReadHoldingRegisters, 1, 1, 1);
ReadHoldingInputRegistersResponse expectedResponse = new ReadHoldingInputRegistersResponse(Modbus.ReadHoldingRegisters, 1, new RegisterCollection(1));
ReadHoldingInputRegistersResponse response = transport.UnicastMessage <ReadHoldingInputRegistersResponse>(request);
Assert.AreEqual(expectedResponse.MessageFrame, response.MessageFrame);
mocks.VerifyAll();
}
public void UnicastMessage_ReReads_IfShouldRetryReturnTrue()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.RetryOnOldResponseThreshold = 3;
transport.Stub(x => x.Write(null)).IgnoreArguments();
Expect.Call(transport.ReadResponse <ReadHoldingInputRegistersResponse>())
.Return(new ReadHoldingInputRegistersResponse(Modbus.ReadHoldingRegisters, 1, new RegisterCollection(1)))
.Repeat.Times(2)
.Message("ReadResponse should be called twice, one for the retry");
transport.Expect(x => x.OnValidateResponse(null, null)).IgnoreArguments();
Expect.Call(transport.OnShouldRetryResponse(null, null))
.IgnoreArguments()
.Return(true)
.Repeat.Times(1);
Expect.Call(transport.OnShouldRetryResponse(null, null))
.IgnoreArguments()
.Return(false)
.Repeat.Times(1);
mocks.ReplayAll();
ReadHoldingInputRegistersRequest request = new ReadHoldingInputRegistersRequest(Modbus.ReadHoldingRegisters, 1, 1, 1);
ReadHoldingInputRegistersResponse response = transport.UnicastMessage <ReadHoldingInputRegistersResponse>(request);
mocks.VerifyAll();
}
public void UnicastMessage()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Write(null);
LastCall.IgnoreArguments();
// read 4 coils from slave id 2
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Return(new ReadCoilsInputsResponse(Modbus.ReadCoils, 2, 1,
new DiscreteCollection(true, false, true, false, false, false, false, false)));
transport.OnValidateResponse(null, null);
LastCall.IgnoreArguments();
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadCoils, 2, 3, 4);
ReadCoilsInputsResponse expectedResponse = new ReadCoilsInputsResponse(Modbus.ReadCoils, 2, 1,
new DiscreteCollection(true, false, true, false, false, false, false, false));
ReadCoilsInputsResponse response = transport.UnicastMessage <ReadCoilsInputsResponse>(request);
Assert.Equal(expectedResponse.MessageFrame, response.MessageFrame);
mocks.VerifyAll();
}
public void UnicastMessage_ReReadsIfValidateResponseIsFalse()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.WaitToRetryMilliseconds = 5;
transport.Write(null);
LastCall.IgnoreArguments();
Expect.Call(transport.ReadResponse <ReadHoldingInputRegistersResponse>())
.Return(new ReadHoldingInputRegistersResponse(Modbus.ReadHoldingRegisters, 1, new RegisterCollection(1)))
.Repeat.Times(2)
.Message("ReadResponse should be called twice, one for the retry");
Expect.Call(transport.OnValidateResponse(null, null))
.IgnoreArguments()
.Return(false)
.Repeat.Times(1);
Expect.Call(transport.OnValidateResponse(null, null))
.IgnoreArguments()
.Return(true)
.Repeat.Times(1);
mocks.ReplayAll();
ReadHoldingInputRegistersRequest request = new ReadHoldingInputRegistersRequest(Modbus.ReadHoldingRegisters, 1, 1, 1);
ReadHoldingInputRegistersResponse response = transport.UnicastMessage <ReadHoldingInputRegistersResponse>(request);
mocks.VerifyAll();
}
public void UnicastMessage_ErrorSlaveException()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Write(null);
LastCall.IgnoreArguments();
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Do((ThrowExceptionDelegate) delegate { throw new SlaveException(); });
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadInputs, 2, 3, 4);
Assert.Throws <SlaveException>(() => transport.UnicastMessage <ReadCoilsInputsResponse>(request));
mocks.VerifyAll();
}
public void UnicastMessage_TimeoutException()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Write(null);
LastCall.IgnoreArguments().Repeat.Times(Modbus.DefaultRetries + 1);
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Do((ThrowExceptionDelegate) delegate { throw new TimeoutException(); })
.Repeat.Times(Modbus.DefaultRetries + 1);
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadInputs, 2, 3, 4);
transport.UnicastMessage <ReadCoilsInputsResponse>(request);
mocks.VerifyAll();
}
public void UnicastMessage_WrongResponseFunctionCode()
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Write(null);
LastCall.IgnoreArguments().Repeat.Times(Modbus.DefaultRetries + 1);
// read 4 coils from slave id 2
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Return(new ReadCoilsInputsResponse(Modbus.ReadCoils, 2, 0, new DiscreteCollection()))
.Repeat.Times(Modbus.DefaultRetries + 1);
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadInputs, 2, 3, 4);
Assert.Throws <IOException>(() => transport.UnicastMessage <ReadCoilsInputsResponse>(request));
mocks.VerifyAll();
}
public void UnicastMessage_TooManyFailingExceptions(Type exceptionType)
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Write(null);
LastCall.IgnoreArguments().Repeat.Times(transport.Retries + 1);
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Do((ThrowExceptionDelegate) delegate { throw (Exception)Activator.CreateInstance(exceptionType); })
.Repeat.Times(transport.Retries + 1);
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadCoils, 2, 3, 4);
Assert.Throws(exceptionType, () => transport.UnicastMessage <ReadCoilsInputsResponse>(request));
mocks.VerifyAll();
}
public void UnicastMessage_TooManyFailingExceptions(Type exceptionType)
{
MockRepository mocks = new MockRepository();
ModbusTransport transport = mocks.PartialMock <ModbusTransport>();
transport.Write(null);
LastCall.IgnoreArguments().Repeat.Times(transport.Retries + 1);
Expect.Call(transport.ReadResponse <ReadCoilsInputsResponse>())
.Do((ThrowExceptionDelegate) delegate { throw (Exception)Activator.CreateInstance(exceptionType); })
.Repeat.Times(transport.Retries + 1);
mocks.ReplayAll();
ReadCoilsInputsRequest request = new ReadCoilsInputsRequest(Modbus.ReadCoils, 2, 3, 4);
Action action = () => transport.UnicastMessage <ReadCoilsInputsResponse>(request);
typeof(AssertUtility).GetMethod("Throws", BindingFlags.Public | BindingFlags.Static).
MakeGenericMethod(new Type[] { exceptionType }).
Invoke(transport, new object[] { action });
mocks.VerifyAll();
}