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minstrel/android
bvandeusenandClaude Opus 5 d3b40342b4
android / Build + lint + test (push) Successful in 3m54s
test(home): drive the veil tests' clock explicitly, not advanceUntilIdle
All seven new UpdateVeilController tests failed in CI run 3163, and the
one test that passed is the tell: it was the only one that never called
advanceUntilIdle().

advanceUntilIdle() advances only while *foreground* work remains. Every
coroutine this controller owns lives in backgroundScope — it has to, because
its consumer loop runs forever and would otherwise stop runTest from
completing — so advanceUntilIdle() returned having run nothing at all, and
the assertions landed on a session that never started. Hence "exhausts its
attempts. Expected <3>, actual <0>" and, where an earlier advanceTimeBy had
got a session partway, "retries until the pull succeeds. Expected <3>,
actual <2>".

Each wait is now an explicit advanceTimeBy sized for what that test still
has pending, and the class KDoc says why so nobody folds them back.

The drains stay deliberately under maxHoldMs. If a drain overshot the
ceiling, "the veil lowered" would stop distinguishing "it settled" from "it
gave up" — which is exactly what these tests exist to tell apart.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-31 20:47:20 -04:00
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