While trying to get the unit tests working again I stumbled over all those
things that I thought could be better^TM.
Now we also know "TODO: why does this make the test fail?" - because
the unit tests are brittle AF ... and we have to init the subsystems
we use in the test, otherwise the cleanup will fail...
BTW. you can now also only run a single test ... or a pattern or so ...
you'd have to read how `cmocka_set_test_filter()` works exactly.
Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>
## Summary
Fixes https://github.com/profanity-im/profanity/issues/1907
Update functional and unit test code to comply with the current cmocka test runner.
## Changes
- `UnitTest` struct to `CMUnitTest` struct
- `unit_test()` macro to `cmocka_unit_test(f)` macro
- `unit_test_setup_teardown()` macro to `cmocka_unit_test_setup_teardown` macro
- `run_tests()` macro to `cmocka_run_group_tests()` function
- Setup and teardown functions return `int` instead of `void`
## Testing
### Unit Tests
`make check`
### Functional Tests
I did not compile or run functional tests because they are *shelved* for now.
### Valgrind
I'm not entirely sure how to fun Valgrind in this case. I did not do fancy memory management, so it should be fine.
