test(fast-browser): retain per-operation timing and failure costs

2026-09-21 13:33:51 -04:00
parent 6a725c1f47
commit 12a6bb6afb
2 changed files with 48 additions and 9 deletions
@@ -6,6 +6,7 @@ import {
  pairedArmOrder,
  safeFailure,
  summarizeBenchmarkAttempts,
+  timingDelta,
  validWorkerCounters,
  summarizeTimings,
  validateBenchmarkOptions,
@@ -27,6 +28,11 @@ test("timing aggregation reports bounded p50 and p95 without wall-clock assumpti
  assert.deepEqual(summarizeTimings([]), { count: 0, p50: null, p95: null });
 });

+test("transport timer deltas preserve bounded operation names and failed costs", () => {
+  assert.deepEqual(timingDelta({ observe: 12, closeTab: 4 }, { observe: 19, closeTab: 4, waitPopup: 8 }), { observe: 7, waitPopup: 8 });
+  assert.deepEqual(timingDelta({ observe: 10 }, { observe: 9 }), {});
+});
+
 test("paired order alternates AB and BA while retaining failed attempts", () => {
  assert.deepEqual(pairedArmOrder(1), ["baseline", "optimized"]);
  assert.deepEqual(pairedArmOrder(2), ["optimized", "baseline"]);