public void WhenSendMultipleMessages_MustQueueItAndSendOneAfterAnother()
{
// PLC sends valid handshake
_tagListener
.Setup(t => t.ReadTagSynchronously(It.IsAny <Tag>()))
.Callback <Tag>(tag => { tag.Value = DataStateEnum.DataChannelFree; });
int writeCalls = 0;
_tagController
.Setup(t => t.WriteTag(It.IsAny <Tag>(), It.IsAny <object>()))
.Callback(() => writeCalls++);
Action act = () =>
{
var udt = new ValidDataUdtTest();
_testee.AddAsyncWriteTask(_tag, udt);
_testee.AddAsyncWriteTask(_tag, udt);
_testee.AddAsyncWriteTask(_tag, udt);
_testee.AddAsyncWriteTask(_tag, udt);
_testee.AddAsyncWriteTask(_tag, udt);
_testee.WaitWriteComplete();
};
act.ShouldNotThrow("DataChannelManager must never throw an exception, but only error events");
writeCalls.Should().Be(5, "LineControl sent 5 valid messages");
}
public void GivenOneMessageIsInvalid_WhenSendMultipleMessages_MustSendAtLeastTheValidMessages()
{
_testee.MonitorEvents();
// PLC sends valid handshake
_tagListener
.Setup(t => t.ReadTagSynchronously(It.IsAny <Tag>()))
.Callback <Tag>(tag => { tag.Value = DataStateEnum.DataChannelFree; });
int writeCalls = 0;
_tagController
.Setup(t => t.WriteTag(It.IsAny <Tag>(), It.IsAny <object>()))
.Callback(() => writeCalls++);
Action act = () =>
{
var udt = new ValidDataUdtTest();
var invalidUdt = new InvalidDataUdtTest();
_testee.AddAsyncWriteTask(_tag, udt);
_testee.AddAsyncWriteTask(_tag, invalidUdt);
_testee.AddAsyncWriteTask(_tag, udt);
_testee.WaitWriteComplete();
};
act.ShouldNotThrow("DataChannelManager must never throw an exception, but only error events");
_testee.ShouldRaise("CommunicationProblemOccured");
writeCalls.Should().Be(2, "2 messages are valid and 1 is invalid (should be skipped)");
}
public void WhenValidDataUdtToChannel_MustNotThrowException()
{
// PLC sends valid handshake
_tagListener
.Setup(t => t.ReadTagSynchronously(It.IsAny <Tag>()))
.Callback <Tag>(tag => { tag.Value = DataStateEnum.DataChannelFree; });
Action act = () =>
{
var udt = new ValidDataUdtTest();
_testee.AddAsyncWriteTask(_tag, udt);
_testee.WaitWriteComplete();
};
act.ShouldNotThrow("DataChannelManager must never throw an exception, but only error events");
}
public void GivenPlcSendsFatalResponse_WhenWriteValidData_MustThrowException()
{
_testee.MonitorEvents();
// PLC sends fatal error response
_tagListener
.Setup(t => t.ReadTagSynchronously(It.IsAny <Tag>()))
.Callback <Tag>(tag => { tag.Value = DataStateEnum.InvalidDataReceivedError; });
Action act = () =>
{
var udt = new ValidDataUdtTest();
_testee.AddAsyncWriteTask(_tag, udt);
_testee.WaitWriteComplete();
};
act.ShouldNotThrow("DataChannelManager must never throw an exception, but only error events");
_testee.ShouldRaise("CommunicationProblemOccured");
}
public void GivenPlcSendsInvalidData_WhenWriteValidData_TryItSeveralTimes()
{
// PLC sends invalid data
_tagListener
.Setup(t => t.ReadTagSynchronously(It.IsAny <Tag>()))
.Callback <Tag>(tag => { tag.Value = DataStateEnum.InvalidDataReceived; });
int writeCalls = 0;
_tagController
.Setup(t => t.WriteTag(It.IsAny <Tag>(), It.IsAny <object>()))
.Callback(() => writeCalls++);
Action act = () =>
{
var udt = new ValidDataUdtTest();
_testee.AddAsyncWriteTask(_tag, udt);
_testee.WaitWriteComplete();
};
act.ShouldNotThrow("DataChannelManager must never throw an exception, but only error events");
writeCalls.Should().BeGreaterThan(1, "LineControl should try to repeat send data over DataChannel in case of negative feedback from PLC");
}
