43 lines
1.6 KiB
TypeScript
43 lines
1.6 KiB
TypeScript
import assert from 'node:assert/strict';
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import test from 'node:test';
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import { PhaseMetrics, percentile, summarizeDistribution, summarizePhaseMetrics } from '../src/metrics.js';
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void test('nearest-rank percentiles and summaries are deterministic', () => {
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const values = [100, 1, 5, 3, 2, 4];
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const sorted = [...values].sort((left, right) => left - right);
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assert.equal(percentile(sorted, 50), 3);
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assert.equal(percentile(sorted, 95), 100);
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assert.deepEqual(summarizeDistribution(values), {
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count: 6,
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min: 1,
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max: 100,
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mean: 19.167,
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p50: 3,
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p95: 100,
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p99: 100,
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});
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});
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void test('phase aggregation separates success, error, latency, and event counters', () => {
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const metrics = new PhaseMetrics();
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metrics.recordHttp('own', 10, null);
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metrics.recordHttp('own', 20, 'http-500');
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metrics.recordSseEvent('ready');
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metrics.recordSseEvent('ready');
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metrics.recordHttpResult('own', 'unchanged');
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metrics.processRssBytes.push(100, 200);
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metrics.sseActiveConnections.push(0, 2);
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const summary = summarizePhaseMetrics(metrics, {
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cpuPercentOfOneCore: 5,
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rssBytes: summarizeDistribution(metrics.processRssBytes),
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eventLoopLagMs: { min: 1, max: 2, mean: 1.5, p50: 1, p95: 2, p99: 2 },
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});
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assert.deepEqual(summary.http.success, { own: 1 });
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assert.deepEqual(summary.http.errors, { 'own:http-500': 1 });
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assert.deepEqual(summary.http.results, { 'own:unchanged': 1 });
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assert.equal(summary.http.latencyMs.own?.p50, 10);
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assert.deepEqual(summary.sse.events, { ready: 2 });
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assert.equal(summary.sse.activeConnections.max, 2);
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});
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