Issue #86: TestStartSweeper_RecordsMetricsOnSuccess fails in full-suite.
Root cause: two cooperating bugs in the sweeper test harness.
1. Sweeper loop called sweepOnce after ctx cancellation (double-increment).
When ctx was cancelled the loop's select received ctx.Done(), called
sweepOnce with the cancelled ctx, storage.Sweep returned context error,
and metrics.PendingUploadsSweepError() incremented the error counter a
SECOND time before the loop exited. Subsequent tests captured a polluted
error baseline and their deltaError assertions failed.
2. Tests called defer cancel() without waiting for the goroutine to exit.
The goroutine could still be blocked on Sweep (waiting for the next
ticker's C channel) when the next test called metricDelta(). If the
goroutine's Sweep returned during the next test's measurement window,
the shared metric counters mutated mid-baseline.
Fix (production code):
- Guard the ticker arm: if ctx.Err() != nil, continue instead of calling
sweepOnce. This prevents the post-cancellation sweep from running.
Fix (test harness):
- startSweeperWithInterval gains a done chan struct{} parameter. When the
loop exits the channel is closed exactly once.
- StartSweeperForTest starts the goroutine and returns the done channel,
allowing tests to drain it with <-done after cancel() — guaranteeing
the goroutine has fully terminated before the next test's baseline.
All 8 sweeper tests now use StartSweeperForTest and drain the done
channel before returning, ensuring stable metric baselines across the
full suite.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Molecule AI Core-BE
2077cf4054