fix van hees onset/offset epoch-0 fabrication - #74
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…set/offset hasTs only checked accel.first.tsMs (the every() branch was dead code, implied by the first check). if the sample at bestStart or the min(bestEnd,n-1) sample was unstamped while the first sample wasn't, offsetMs/onsetMs got set to 0.0 instead of null. now each field checks its own source sample independently.
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ChangesSleep timestamp handling
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Merge Risk: 🔵 Low · up to The new tests may pass without protecting the missing-timestamp behavior at the actual sleep-window boundaries. Strengthen the fixtures before merging to preserve this regression coverage. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Reviewer's GuideFix van Hees onset/offset timestamp handling by validating each selected endpoint sample independently, preventing unstamped samples from producing a fake 1970 timestamp, and add regression tests for both mixed-stamped cases. Flow diagram for independent onset and offset timestamp validationflowchart LR
A[Select onset sample at bestStart] --> B{onsetSample.tsMs != 0}
B -->|yes| C[onsetMs = onsetSample.tsMs]
B -->|no| D[onsetMs = null]
E["Select offset sample at min(bestEnd, n - 1)"] --> F{offsetSample.tsMs != 0}
F -->|yes| G[offsetMs = offsetSample.tsMs]
F -->|no| H[offsetMs = null]
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In `@test/onehz/sleep_test.dart`:
- Around line 158-208: Update the tests around vanHeesSleepWindow to mutate the
samples selected by the detector rather than assuming fixture boundaries: first
run it on the fully timestamped fixture, use the returned onsetIdx and exclusive
offsetIdx positions, set those samples’ timestamps to zero, rerun the detector,
and unconditionally assert onsetMs and offsetMs are null. Keep the existing
signal fixture and verify valid indices before mutation.
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the offset test was zeroing accel.length-1's timestamp but bestEnd doesn't land on the true block boundary (same edge tolerance the square-wave test already accepts), so the old assert was gated behind an if that never fired. zero a window near the boundary instead and assert the detector actually landed inside it before checking offsetMs. same tightening on the onset test (exact index assert instead of an if-guard).
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hasTs was
accel.every(...) || accel.first.tsMs != 0— the every() branch is dead code (implies first is nonzero anyway), so it really only checked the first sample's timestamp, not the ones actually used for onset/offsetMs.if accel[bestStart] or accel[min(bestEnd,n-1)] was unstamped (tsMs==0) while accel.first wasn't, this set offsetMs (or onsetMs) to 0.0 — a fake 1970-01-01 timestamp instead of null.
fix: check each field against its own source sample instead of one shared proxy check.
no caller reads vanHeesSleepWindow's own onset/offsetMs today (segment.dart builds its own SleepWindow separately), so no kAlgoVersion bump needed. added two regression tests for the mixed-stamped case.
Summary by Sourcery
Ensure Van Hees sleep-window timestamps are derived independently from their corresponding samples.
Bug Fixes:
Tests:
Summary by CodeRabbit
Bug Fixes
Tests