Overflow Exception when AssertEquals_Bool or AssertEquals_STRING

[andimin182]

Hey there,
I'm having quiet a lot of problem with a recurrent Overflow Exception when running the tests in TcUnit. I debugged the problem and i identify that this exception is thrown by the function:
AssertMessageFormatter.LogAssertFailure(Expected := BOOL_TO_STRING(Expected),
Actual := BOOL_TO_STRING(Actual),
Message := Message,
TestInstancePath := TestInstancePath);

In fact, in my case, there is a test that failes, hence it logs the failure but it gives me an overflow exception instead of correctly log the failure. I couldn't identify which argument is in overflow and why...
A second case, when instead the result == expected, Overflow exception is raised in another function that is:
AssertResults.ReportResult(ExpectedSize := SIZEOF(Expected),
ExpectedTypeClass := IBaseLibrary.TypeClass.TYPE_BOOL,
ExpectedValue := ADR(Expected),
ActualSize := SIZEOF(Actual),
ActualTypeClass := IBaseLibrary.TypeClass.TYPE_BOOL,
ActualValue := ADR(Actual),
Message := Message,
TestInstancePath := TestInstancePath,
AlreadyReported => AlreadyReported);
Does anyone else had this problem and know how to solve it? I'm not sure if it's something that i do wrong in my PLC library or depends entirely on the TcUnit library...
Thanks in advance for the support.

[sagatowski]

Hi @andimin182. Not enough context. Can you provide the following information:

To Reproduce
What steps are necessary to reproduce the behavior?

Screenshots
If applicable, add screenshots to help explain your problem.

Software versions
Which version of the applicable software did you use? (TcUnit library, TwinCAT XAE version, Visual Studio version etc)

Run environment
Under what environment did you run the software? PLC? Virtual machine?

Do you have a working example of this problem that you can share?

[andimin182]

Yes, of course:

Run ENV
I run it both on PLC and local virtual machine.

SW versions

• Visual Studio 2017 v 15.9.51
• TcUnit lib 1.2.1.0

Steps to reproduce
I have a quiet huge FSM. I added a new functionality, i.e. a new transition from one state to another. Therefore, I wrote an additional unit test to validate this transition. I put a breackpoint just before the AssertEquals function and the test it seems correct to me as you can see from the image below. However, i have an Exception from the first assert:

[sagatowski]

There is no version 1.2.1 of TcUnit. Please download of the releases, preferably the latest one.

If this doesn't work, please upload an example project that reproduces the error.

[sagatowski]

It's very hard for me to see what's happening, but is it possible that you are asserting a property?
In that case, read this: #209
And this: https://tcunit.org/#/faq?id=_13-assertequalsany-on-properties-makes-my-development-environment-crash-why