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Josh Creek
8810bf7d8f
Closes most of §8.43's 'decline, regional outage retry UI, failed
reconnect, duplicate-action recovery beyond proposals' remaining
list -- turned out to be mostly stale doc, not missing code.
matchmaking.gd's decline button/handler already existed
(%DeclineButton, _on_decline_pressed, visibility toggled by
MatchmakingState.PROPOSED alongside accept). ControlPlaneClient's
can_retry_last_mutation()/retry_last_mutation() -- the generic
'duplicate-action recovery beyond proposals' and 'regional outage
retry' mechanism -- also already existed: any mutation (not just a
proposal response) becomes retryable on a transport failure or a
408/429/503 response, and matchmaking.gd's queue button already fell
back to it ('Retry Request'). Neither had any test coverage proving
the mechanism actually works for a non-proposal mutation --
is_retryable_mutation_response's pure classification was the only
thing tested.
Two new tests: test_generic_mutation_retry_recovers_after_a_transient_failure
proves can_retry_last_mutation() transitions from false (mutation
in flight) to true after a transport-level failure on an ordinary
queue_heartbeat, exactly the 'regional outage' case; test_generic_mutation_retry_is_not_offered_for_unsafe_failures
proves a 409 (revision conflict) is never offered as a blind retry
and that retry_last_mutation() fails closed with ERR_INVALID_DATA
rather than resending a stale mutation. retry_last_mutation's literal
network dispatch (HTTPRequest.request()) is not exercised -- it needs
a live SceneTree that test_runner.tscn's synchronous single-_ready()
execution model cannot provide mid-suite; the two tests cover the
can_retry_last_mutation() decision boundary and the fail-closed path
instead, which is what's actually new here.
Verified against the real Godot 4.7.1 binary now that headless
testing has resumed: test_runner.tscn 214/214 clean (no crash, no
engine-level error), full make verify-multiplayer-local re-run clean,
zero new crash reports.
Remaining in §8.43: version-mismatch-specific messaging (a protocol
rejection currently surfaces only as the server's generic error
string), failed-reconnect UX, and §8.16's arena selection/long-running
worker integration.
