The dangling ptrs derefencing freed memory has been fixed.
They caused the tests to trigger the ASan. Additonally, in some tests
where DB objects were allocated dynamically, they are now allocated
automatically on the stack to simplify the code.
Add proper catch2 support:
- add catch2 as a submodule
- add cmake function to add test easily
- discover each test in test binary
- remove copies of catch.hpp
- do not try to process tests for rt1051
Do not test internals of utf8, only public interface (nasty bugs could
occur otherwise).
Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
