Move the spa tests to the pwtest framework. The pod tests have only been
wrapped in the function callers, they don't use the variuos pwtest helpers -
too much work for very little gain here. Can be done incrementally if needed.
Note that this removes the spa tests from the installed tests. Arguably,
installing those tests was unnecessary anyway since they are static binaries
and don't load anything. So having them installed runs the same tests as
having them run in the source tree.
Goal for the pwtest framework is to allow for installed tests, just not there
yet.
Helper function to load a SPA interface. This enables a test to easily load a
specific interface and run tests against that interface without having to
instantiate a whole pipewire daemon.
Heavily inspired by libinput's litest framework (built around check), this is
a from-scratch framework that simplifies adding tests for various parts of
pipewire. See the pwtest.h documentation for details but the basics are:
- PW_TEST() and PWTEST_SUITE() specify the tests to be run
- Test are run in forked processes, any errors/signals are caught and printed
to the log
- Tests have a custom pipewire daemon started on demand to talk to [1]. The
daemon's log is available in the test output.
- Output is YAML to be processed into whatever format needed
[1] There are limits here, since we can't emulate devices yet there is only
so much we can rely on with the daemon.
