`asyncio.get_event_loop` fails on Python 3.14 if there is no current
event loop. For this particular test of sync behaviour, it seems to
make most sense to explicitly create one.
Because an integer was being passed where a TLObject was expected,
so the serialization with bytes() was actually requesting that many
bytes as opposed to properly converting the expected object.
Add testing configuration:
- pytest as test framework
- tox for creating testing environments and running tests (run with `tox`)
- pytest-asycio for asyncio testing
- coverage/pytest-cov for measuring test coverage
- flake8 for pep8 checking
I've also added one quick example test demonstrating basic unit testing
and use of the basic fixtures and marks provided by pytest-asyncio.
Just this already covers a suprising 32% of the codebase, mostly through
imports, but I wouldn't expect it to be helpful yet. This should provide
a good base to build on in the future though.
