Ampersand Operator in ut test framework

[mgnisia]

Problem Description

If one uses the ampersand operator like

"example"_test = [&] {
// do some tests
}

This causes that the approval tests files can not be found.

Example Repository: https://github.com/mgnisia/ut-approvaltests-example

Proposed (easy) Solution

1. Update Documentation for UT: Add this as a special case.
2. Remove Ampersand in test

[claremacrae]

Thank you for reporting the issue.

Approval Tests depends on the underlying test framework to report the name of the source file. So for some reason, when [&] is used, the file name isn't captured.

I started reporting this as a Boost.ut bug and then realised that it would be worth first testing this out with the latest release of Boost.ut...

If you have had time to do that and note here what happened, that would be really helpful...

[mgnisia]

Thats good to know 👍 Currently I am using the latest release and appears there as well. I am finished with my master thesis in November, if this bug is not fixed until then, I can have a look then :)

[claremacrae]

OK that's helpful - thank you. If I get time, I'll try looking at this before then - most likely reporting it as a bug in Boost.ut

Good luck with your thesis @mgnisia !

[claremacrae]

I have logged this issue in the boost.ut project: boost-ext/ut#434

[sam20908]

This commit addresses the issue with MSVC (and possibly other compilers? Will need testing) boost-ext/ut@76e2f56.

[claremacrae]

@sam20908 Hi Sam, thanks very much for looking at this..

I checked the Compiler Explorer link that I put in to that boost.ut issue, and the failing test there is still failing, so unfortunately I think there's still a problem...

https://godbolt.org/z/13Y7Wq1r7

[claremacrae]

This is on-hold until the upstream bug is fixed, at which point our CI will alert us