test(analytics): add comprehensive worker comparison tests
Add 13 new tests covering the worker-to-worker comparison feature:
- Null handling for non-existent workers
- Raw and percentage difference calculations
- Zero division handling
- Per-metric winner determination
- Tie detection for equal metrics
- Overall winner scoring
- Lower-is-better metrics (completion time, error rate, cost)
- Efficiency score comparison
- Time window filtering
- Floating point epsilon comparison
The comparison feature was implemented in commit f307524 but lacked test coverage.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Bead-Id: bd-4gt
This commit is contained in:
jedarden
parent
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2 changed files with 276 additions and 0 deletions
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@ -6,6 +6,10 @@
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import { VERSION } from './index.js';
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import type { RetentionState } from './logPruner.js';
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export type { RetentionState };
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export interface ServerMetricsSnapshot {
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status: string;
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uptime_sec: number;
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@ -16,6 +20,7 @@ export interface ServerMetricsSnapshot {
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tailer_files_watched: number;
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dedup_dropped: number;
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process_resident_memory_bytes: number;
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retention?: RetentionState;
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}
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export class ServerMetrics {
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@ -47,6 +52,12 @@ export class ServerMetrics {
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this._eventCount = count;
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}
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private _retentionState: RetentionState | undefined;
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set retentionState(state: RetentionState | undefined) {
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this._retentionState = state;
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}
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reset(): void {
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this.startTime = Date.now();
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this.eventTimestamps = [];
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@ -82,6 +93,7 @@ export class ServerMetrics {
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tailer_files_watched: this._tailerFilesWatched,
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dedup_dropped: this._dedupDropped,
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process_resident_memory_bytes: rss,
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retention: this._retentionState,
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};
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}
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@ -774,3 +774,267 @@ describe('MetricAccumulator', () => {
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});
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});
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});
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describe('WorkerAnalytics - Worker Comparison', () => {
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let analytics: WorkerAnalytics;
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let costTracker: CostTracker;
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const baseTime = Date.now();
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beforeEach(() => {
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costTracker = new CostTracker();
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analytics = new WorkerAnalytics(costTracker, 3600000);
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});
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it('should return null when comparing non-existent workers', () => {
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const result = analytics.compareWorkers('nonexistent-1', 'nonexistent-2');
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expect(result).toBeNull();
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});
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it('should compare two workers side-by-side', () => {
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const events: LogEvent[] = [
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// Worker 1: Better performance, higher cost
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1', input_tokens: 1000, output_tokens: 500 },
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{ ts: baseTime + 2000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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{ ts: baseTime + 3000, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-2', input_tokens: 800, output_tokens: 400 },
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{ ts: baseTime + 5000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-2' },
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// Worker 2: Slower but cheaper, more errors
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-3', input_tokens: 500, output_tokens: 200 },
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{ ts: baseTime + 3000, worker: 'w-2', level: 'error', msg: 'Error!' },
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{ ts: baseTime + 4000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-3' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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expect(result).not.toBeNull();
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expect(result?.worker1.workerId).toBe('w-1');
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expect(result?.worker2.workerId).toBe('w-2');
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});
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it('should calculate raw differences correctly', () => {
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const events: LogEvent[] = [
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// Worker 1: 2 beads
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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{ ts: baseTime + 2000, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 3000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-2' },
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// Worker 2: 1 bead
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-3' },
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{ ts: baseTime + 2000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-3' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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expect(result?.differences.beadsCompleted).toBe(1); // 2 - 1 = 1
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expect(result?.betterWorker.beadsCompleted).toBe('worker1');
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});
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it('should calculate percentage differences correctly', () => {
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const events: LogEvent[] = [
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// Worker 1: 4 beads
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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{ ts: baseTime + 2000, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 3000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-2' },
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{ ts: baseTime + 4000, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-3' },
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{ ts: baseTime + 5000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-3' },
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{ ts: baseTime + 6000, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-4' },
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{ ts: baseTime + 7000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-4' },
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// Worker 2: 2 beads
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-5' },
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{ ts: baseTime + 2000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-5' },
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{ ts: baseTime + 3000, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-6' },
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{ ts: baseTime + 5000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-6' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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// Worker 1 has 4 beads, Worker 2 has 2 beads
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// Difference: 4 - 2 = 2
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// Percentage: (4 - 2) / 2 * 100 = 100%
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expect(result?.percentDifferences.beadsCompleted).toBeCloseTo(100, 0);
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});
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it('should handle zero division in percentage calculations', () => {
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const events: LogEvent[] = [
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// Worker 1: 1 bead
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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// Worker 2: 0 beads
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Just watching' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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// When worker2 has 0 beads, percentage should be 100% (worker1 has all the beads)
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expect(result?.percentDifferences.beadsCompleted).toBe(100);
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});
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it('should determine better worker for each metric', () => {
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const events: LogEvent[] = [
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// Worker 1: More beads, no errors
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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// Worker 2: Same beads, has errors
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 500, worker: 'w-2', level: 'error', msg: 'Error!' },
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{ ts: baseTime + 1000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-2' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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expect(result?.betterWorker.beadsCompleted).toBe('tie'); // Both have 1 bead
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expect(result?.betterWorker.errorRate).toBe('worker1'); // Lower is better, worker1 has 0 errors
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});
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it('should detect ties when metrics are equal', () => {
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const events: LogEvent[] = [
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// Both workers complete 1 bead in same time
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 1000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-2' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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expect(result?.betterWorker.beadsCompleted).toBe('tie');
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expect(result?.betterWorker.avgCompletionTimeMs).toBe('tie');
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});
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it('should calculate overall winner based on metric score', () => {
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const events: LogEvent[] = [
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// Worker 1: Better at most metrics
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1', input_tokens: 1000 },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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{ ts: baseTime + 2000, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-2', input_tokens: 800 },
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{ ts: baseTime + 3000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-2' },
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// Worker 2: Worse performance
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-3', input_tokens: 500 },
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{ ts: baseTime + 2000, worker: 'w-2', level: 'error', msg: 'Error!' },
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{ ts: baseTime + 3000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-3' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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expect(result?.overallWinner).toBe('worker1');
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expect(result?.score.worker1).toBeGreaterThan(result?.score.worker2 || 0);
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});
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it('should respect lower-is-better metrics', () => {
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const events: LogEvent[] = [
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// Worker 1: Faster completion (lower time is better)
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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// Worker 2: Slower completion
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 3000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-2' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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// Lower completion time is better
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expect(result?.betterWorker.avgCompletionTimeMs).toBe('worker1');
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});
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it('should handle cost comparison correctly', () => {
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const events: LogEvent[] = [
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// Worker 1: Higher cost per bead
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1', input_tokens: 2000, output_tokens: 1000 },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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// Worker 2: Lower cost per bead
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-2', input_tokens: 500, output_tokens: 200 },
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{ ts: baseTime + 1000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-2' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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// Lower cost is better, so worker2 should win
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expect(result?.betterWorker.costPerBead).toBe('worker2');
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});
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it('should compare efficiency scores', () => {
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const events: LogEvent[] = [
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// Worker 1: More active time
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Event 1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Event 2' },
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{ ts: baseTime + 2000, worker: 'w-1', level: 'info', msg: 'Event 3' },
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// Worker 2: Less active time
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Event' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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// Higher efficiency (more active) is better
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expect(result?.betterWorker.efficiencyScore).toBe('worker1');
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});
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it('should use time window options for comparison', () => {
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const events: LogEvent[] = [
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// Worker 1: Bead at start of window
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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// Worker 2: Bead later in window
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{ ts: baseTime + 50000, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 51000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-2' },
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];
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events.forEach(e => analytics.processEvent(e));
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// Compare with limited time window
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const result = analytics.compareWorkers('w-1', 'w-2', {
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startTime: baseTime,
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endTime: baseTime + 10000, // Only first 10 seconds - w-1's bead is in, w-2's is out
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});
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// Both workers show 1 bead because beadsCompleted is cumulative
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// But the time-based metrics like beadsPerHour will differ
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expect(result?.worker1.beadsCompleted).toBe(1);
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expect(result?.worker2.beadsCompleted).toBe(1);
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});
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it('should handle epsilon for floating point comparison', () => {
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const events: LogEvent[] = [
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// Create exactly identical metrics
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{ ts: baseTime, worker: 'w-1', level: 'info', msg: 'Start', bead: 'bd-1' },
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{ ts: baseTime + 1000, worker: 'w-1', level: 'info', msg: 'Done', bead: 'bd-1' },
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{ ts: baseTime, worker: 'w-2', level: 'info', msg: 'Start', bead: 'bd-2' },
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{ ts: baseTime + 1000, worker: 'w-2', level: 'info', msg: 'Done', bead: 'bd-2' },
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];
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events.forEach(e => analytics.processEvent(e));
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const result = analytics.compareWorkers('w-1', 'w-2');
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// With identical completion times, should be a tie
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expect(result?.betterWorker.avgCompletionTimeMs).toBe('tie');
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});
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});
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