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While trying to make this work, I realized that this is the time when I *really really* want to be able to test this stuff. So I got on a sidetrack adventure to write testing infra for running real Wayland clients inside unit tests.

I've got it working! In these tests, I'm creating a new niri instance along with test clients, all on the same test-local event loop. No global state, no threads needed.

What's really cool is that this lets me test the weirdest client-server event timings.

#niri