[Feature Request]: Support testing of C++ files (VSC-1428)

[robertkirk13]

Is your feature request related to a problem? Please describe.
Cannot use unit testing feature with C++ source files as only c test files are detected/supported when using the "unity-app" testing from the test menu in the side bar. Per the documentation on unit testing using the extension, only files following the pattern **/test/test_*.c are detected.

Describe the solution you'd like
Some way to allow c++ test files. Examples of testing c++ files can be found here
It would be nice if it automatically detects if any c++ test files are present, and if so makes test_app_main a cpp file, otherwise just does the existing functionality.

Describe alternatives you've considered
It's possible to test C++ files already but not with the simple vscode tooling that exists for c files. This would probably be a very easy feature to implement.

Additional context

[github-actions]

This issue has been marked as stale since there are no activities, and this will be closed in 5 days if there are no further activities

[fenderle]

I also need this - plus the possibility to select qemu instead of esp. I patched the extension to

1. use the glob "/test/test_*.cpp" instead of "/test/test_*.c"
2. run "pytest --junitxml test.xml --skip-autoflash y --embedded-services idf,qemu -s --test-name '${t}'" instead of "esp,idf"

With these changes in place my unit tests work as I want them to.

It would be super helpful to make those two line configurable through settings or some other kind of override.

The .cpp extension issue can be worked around by using .c and forcing CXX lang in the Cmake file. But that's also very hacky...

[fenderle]

Thank you @brianignacio5.

One minor suggestion: When yout compile the unit tests with the "ESP-IDF: Unit Test: Build and Flash..." command it will always try to flash the binary to the attached controller (or fail trying). Maybe it would be an idea to introduce an option like "ESP-IDF: Unit Test: Build..." with out flashing

[brianignacio5]

Hi @fenderle I have added new 2 commands for both Build unit test app and flash unit test app in the PR.

Please take a look when you can.

By the way could you share an example cpp unit test project ? I would like to add an example in the docs and test it.

[fenderle]

Thank you @brianignacio5, works as well. I will try to prepare a little test project at the weekend.

[fenderle]

@brianignacio5 it took a little while, sorry for that. I created a c++23 version of the unit-test example:

https://github.com/fenderle/unit_test_cpp

Feel free to do whatever you wish with it.