test(performance): add end-to-end Xtream benchmark harness (#1300)

* docs(performance): plan Xtream benchmark * feat(xtream-mock-server): add deterministic 100k fixture * style(xtream-mock-server): apply repository formatting * fix(xtream-mock-server): harden performance fixture data * feat(xtream-mock-server): add performance control plane * docs(performance): correct Xtream capture plan * fix(xtream-mock-server): harden performance controls * fix(xtream-mock-server): harden control lifecycle * feat(performance): add Xtream preload markers * feat(performance): trace Xtream main phases * feat(performance): mark Xtream store publications * feat(performance): trace Xtream database phases * feat(performance): trace Xtream delete cancellation * feat(performance): capture Xtream phase attribution * feat(performance): mark Sources Xtream refresh * test(performance): define Xtream benchmark evidence contracts * test(performance): add Xtream benchmark runner * test(performance): surface failure evidence writes * test(performance): align database read clock * test(performance): preserve capture failure contracts
2026-10-15 13:46:16 -08:00 · 2026-07-28 08:08:07 +02:00
1 parent 5e725a06f3
commit a2fafcfc08
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+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+
+import { XTREAM_SCENARIO_ID } from './xtream-benchmark-contract';
+import {
+    invalidateWorkerRequestMetrics,
+    workerRequestEvidence,
+} from './xtream-worker-request-evidence.fixtures';
+import { deriveXtreamWorkerRequestWindowProxy } from './xtream-worker-request-proxy';
+
+describe('Xtream request-window proxy', () => {
+    it('uses the worst valid request window and excludes only overlap-invalid samples', () => {
+        const evidence = workerRequestEvidence(
+            XTREAM_SCENARIO_ID.INITIAL_IMPORT_LARGE
+        ).map((request, index) =>
+            index === 1
+                ? {
+                      ...request,
+                      eventLoopDelay: {
+                          maxMs: 12,
+                          p95Ms: 4,
+                          p99Ms: 7,
+                      },
+                      eventLoopUtilization: 0.75,
+                  }
+                : request
+        );
+        const withOverlap = invalidateWorkerRequestMetrics(evidence, 1);
+
+        assert.deepEqual(deriveXtreamWorkerRequestWindowProxy(withOverlap), {
+            eventLoopDelayMaxMs: 12,
+            eventLoopDelayP95Ms: 4,
+            eventLoopDelayP99Ms: 7,
+            eventLoopUtilization: 0.75,
+        });
+        assert.equal(
+            deriveXtreamWorkerRequestWindowProxy(
+                invalidateWorkerRequestMetrics(evidence, evidence.length)
+            ),
+            null
+        );
+    });
+});