Running (some) RSpec tests in the CI
This is the logical consequence of progress made on #15 (closed): we can now run some tests in the CI.
It's very partial:
- not all relevant RSpec tests have been fixed yet.
- the tests that do pass are already too long for a single job without more effort (parallelization notably). For instance, all the tests from
rspec/lib
do pass for me but it took 2h last time I tried on a fairly powerful workstation - we should use a more aggressive caching strategy soon.
More details are provided in individual commit descriptions.