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Daniel Hiltgen
a84b315e7b
app/updater: TestBackgoundChecker / TestAutoUpdateDisabledSkipsDownload hit 'TempDir RemoveAll cleanup: directory not empty' on macOS because the background checker goroutine keeps writing staged files into UpdateStageDir while t.TempDir cleanup runs. The checker's context is cancelled by the time cleanup runs, and after cancellation a new download cannot reach the filesystem (DownloadNewRelease aborts at its HEAD request before any write), so it suffices to wait for any in-flight download to drain. Add a test-only waitDownloadIdle helper (polls the existing cancelDownload sentinel under its lock) and register it via t.Cleanup so TempDir cleanup runs after staged-file handles close. No production code changes. x/transfer: TestDownloadParallelism asserted elapsed <= 1s against 50ms-per-blob delays, too tight for Windows hosted runners' ~15ms timer granularity and shared-runner jitter. Each blob costs two server sleeps (resolve GET + body GET), so model the serial baseline from the deterministic request count, raise per-blob latency to 100ms so timer quantization is a small fraction of each delay, and key the budget to 75% of the serial baseline so the check still proves parallelism while tolerating jitter.