feat: TypeScript telemetry client SDK v0.1.0

Standalone npm package (@mosaicstack/telemetry-client) for reporting
task-completion telemetry and querying predictions from the Mosaic
Stack Telemetry server.

- TelemetryClient with setInterval-based background flush
- EventQueue (bounded FIFO array)
- BatchSubmitter with native fetch, exponential backoff, Retry-After
- PredictionCache (Map + TTL)
- EventBuilder with auto-generated event_id/timestamp
- Zero runtime dependencies (Node 18+ native APIs)
- 43 tests, 86% branch coverage

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
2026-02-07 23:25:31 -06:00
commit 177720e523
26 changed files with 5643 additions and 0 deletions

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import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { TelemetryClient } from '../src/client.js';
import { TelemetryConfig } from '../src/config.js';
import {
TaskCompletionEvent,
TaskType,
Complexity,
Harness,
Provider,
Outcome,
} from '../src/types/events.js';
import { PredictionQuery, PredictionResponse } from '../src/types/predictions.js';
function makeConfig(overrides: Partial<TelemetryConfig> = {}): TelemetryConfig {
return {
serverUrl: 'https://tel.example.com',
apiKey: 'a'.repeat(64),
instanceId: 'test-instance',
submitIntervalMs: 60_000,
maxQueueSize: 100,
batchSize: 10,
requestTimeoutMs: 5000,
dryRun: true, // Use dryRun by default in tests
...overrides,
};
}
function makeEvent(id = 'evt-1'): TaskCompletionEvent {
return {
instance_id: 'test-instance',
event_id: id,
schema_version: '1.0',
timestamp: new Date().toISOString(),
task_duration_ms: 5000,
task_type: TaskType.IMPLEMENTATION,
complexity: Complexity.MEDIUM,
harness: Harness.CLAUDE_CODE,
model: 'claude-3-opus',
provider: Provider.ANTHROPIC,
estimated_input_tokens: 1000,
estimated_output_tokens: 500,
actual_input_tokens: 1100,
actual_output_tokens: 550,
estimated_cost_usd_micros: 50000,
actual_cost_usd_micros: 55000,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.5,
outcome: Outcome.SUCCESS,
retry_count: 0,
};
}
function makeQuery(): PredictionQuery {
return {
task_type: TaskType.IMPLEMENTATION,
model: 'claude-3-opus',
provider: Provider.ANTHROPIC,
complexity: Complexity.MEDIUM,
};
}
function makePredictionResponse(): PredictionResponse {
return {
prediction: {
input_tokens: { p10: 500, p25: 750, median: 1000, p75: 1500, p90: 2000 },
output_tokens: { p10: 200, p25: 350, median: 500, p75: 750, p90: 1000 },
cost_usd_micros: { median: 50000 },
duration_ms: { median: 30000 },
correction_factors: { input: 1.1, output: 1.05 },
quality: { gate_pass_rate: 0.85, success_rate: 0.9 },
},
metadata: {
sample_size: 100,
fallback_level: 0,
confidence: 'high',
last_updated: new Date().toISOString(),
cache_hit: false,
},
};
}
describe('TelemetryClient', () => {
let fetchSpy: ReturnType<typeof vi.fn>;
beforeEach(() => {
vi.useFakeTimers();
fetchSpy = vi.fn();
vi.stubGlobal('fetch', fetchSpy);
});
afterEach(() => {
vi.useRealTimers();
vi.unstubAllGlobals();
});
describe('start/stop lifecycle', () => {
it('should start and stop cleanly', async () => {
const client = new TelemetryClient(makeConfig());
expect(client.isRunning).toBe(false);
client.start();
expect(client.isRunning).toBe(true);
await client.stop();
expect(client.isRunning).toBe(false);
});
it('should be idempotent on start', () => {
const client = new TelemetryClient(makeConfig());
client.start();
client.start(); // Should not throw or create double intervals
expect(client.isRunning).toBe(true);
});
it('should be idempotent on stop', async () => {
const client = new TelemetryClient(makeConfig());
await client.stop();
await client.stop(); // Should not throw
expect(client.isRunning).toBe(false);
});
it('should flush events on stop', async () => {
const client = new TelemetryClient(makeConfig());
client.start();
client.track(makeEvent('e1'));
client.track(makeEvent('e2'));
expect(client.queueSize).toBe(2);
await client.stop();
// In dryRun mode, flush succeeds and queue should be empty
expect(client.queueSize).toBe(0);
});
});
describe('track()', () => {
it('should queue events', () => {
const client = new TelemetryClient(makeConfig());
client.track(makeEvent('e1'));
client.track(makeEvent('e2'));
expect(client.queueSize).toBe(2);
});
it('should silently drop events when disabled', () => {
const client = new TelemetryClient(makeConfig({ enabled: false }));
client.track(makeEvent());
expect(client.queueSize).toBe(0);
});
it('should never throw even on internal error', () => {
const errorFn = vi.fn();
const client = new TelemetryClient(
makeConfig({ onError: errorFn, maxQueueSize: 0 }),
);
// This should not throw. maxQueueSize of 0 could cause issues
// but track() is designed to catch everything.
expect(() => client.track(makeEvent())).not.toThrow();
});
});
describe('predictions', () => {
it('should return null for uncached prediction', () => {
const client = new TelemetryClient(makeConfig());
const result = client.getPrediction(makeQuery());
expect(result).toBeNull();
});
it('should return cached prediction after refresh', async () => {
const predictionResponse = makePredictionResponse();
fetchSpy.mockResolvedValueOnce({
ok: true,
status: 200,
json: () =>
Promise.resolve({
results: [predictionResponse],
}),
});
const client = new TelemetryClient(makeConfig({ dryRun: false }));
const query = makeQuery();
await client.refreshPredictions([query]);
const result = client.getPrediction(query);
expect(result).toEqual(predictionResponse);
});
it('should handle refresh error gracefully', async () => {
fetchSpy.mockRejectedValueOnce(new Error('Network error'));
const errorFn = vi.fn();
const client = new TelemetryClient(
makeConfig({ dryRun: false, onError: errorFn }),
);
// Should not throw
await client.refreshPredictions([makeQuery()]);
expect(errorFn).toHaveBeenCalledWith(expect.any(Error));
});
it('should handle non-ok HTTP response on refresh', async () => {
fetchSpy.mockResolvedValueOnce({
ok: false,
status: 500,
statusText: 'Internal Server Error',
});
const errorFn = vi.fn();
const client = new TelemetryClient(
makeConfig({ dryRun: false, onError: errorFn }),
);
await client.refreshPredictions([makeQuery()]);
expect(errorFn).toHaveBeenCalledWith(expect.any(Error));
});
});
describe('background flush', () => {
it('should trigger flush on interval', async () => {
const client = new TelemetryClient(
makeConfig({ submitIntervalMs: 10_000 }),
);
client.start();
client.track(makeEvent('e1'));
expect(client.queueSize).toBe(1);
// Advance past submit interval
await vi.advanceTimersByTimeAsync(11_000);
// In dryRun mode, events should be flushed
expect(client.queueSize).toBe(0);
await client.stop();
});
});
describe('flush error handling', () => {
it('should re-enqueue events on submit failure', async () => {
// Use non-dryRun mode to actually hit the submitter
fetchSpy.mockResolvedValueOnce({
ok: false,
status: 500,
statusText: 'Internal Server Error',
});
const errorFn = vi.fn();
const client = new TelemetryClient(
makeConfig({ dryRun: false, maxRetries: 0, onError: errorFn }),
);
client.track(makeEvent('e1'));
expect(client.queueSize).toBe(1);
// Start and trigger flush
client.start();
await vi.advanceTimersByTimeAsync(70_000);
// Events should be re-enqueued after failure
expect(client.queueSize).toBeGreaterThan(0);
await client.stop();
});
it('should handle onError callback that throws', async () => {
const throwingErrorFn = () => {
throw new Error('Error handler broke');
};
const client = new TelemetryClient(
makeConfig({ onError: throwingErrorFn, enabled: false }),
);
// This should not throw even though onError throws
// Force an error path by calling track when disabled (no error),
// but we can test via refreshPredictions
fetchSpy.mockRejectedValueOnce(new Error('fail'));
await expect(client.refreshPredictions([makeQuery()])).resolves.not.toThrow();
});
});
describe('event builder', () => {
it('should expose an event builder', () => {
const client = new TelemetryClient(makeConfig());
expect(client.eventBuilder).toBeDefined();
const event = client.eventBuilder.build({
task_duration_ms: 1000,
task_type: TaskType.TESTING,
complexity: Complexity.LOW,
harness: Harness.AIDER,
model: 'gpt-4',
provider: Provider.OPENAI,
estimated_input_tokens: 100,
estimated_output_tokens: 50,
actual_input_tokens: 100,
actual_output_tokens: 50,
estimated_cost_usd_micros: 1000,
actual_cost_usd_micros: 1000,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.3,
outcome: Outcome.SUCCESS,
retry_count: 0,
});
expect(event.instance_id).toBe('test-instance');
expect(event.schema_version).toBe('1.0');
});
});
});

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import { describe, it, expect, vi, afterEach } from 'vitest';
import { EventBuilder } from '../src/event-builder.js';
import { ResolvedConfig } from '../src/config.js';
import {
TaskType,
Complexity,
Harness,
Provider,
Outcome,
QualityGate,
RepoSizeCategory,
} from '../src/types/events.js';
function makeConfig(): ResolvedConfig {
return {
serverUrl: 'https://tel.example.com',
apiKey: 'a'.repeat(64),
instanceId: 'my-instance-uuid',
enabled: true,
submitIntervalMs: 300_000,
maxQueueSize: 1000,
batchSize: 100,
requestTimeoutMs: 10_000,
predictionCacheTtlMs: 21_600_000,
dryRun: false,
maxRetries: 3,
onError: () => {},
};
}
describe('EventBuilder', () => {
afterEach(() => {
vi.restoreAllMocks();
});
it('should build a complete TaskCompletionEvent', () => {
const builder = new EventBuilder(makeConfig());
const event = builder.build({
task_duration_ms: 15000,
task_type: TaskType.IMPLEMENTATION,
complexity: Complexity.HIGH,
harness: Harness.CLAUDE_CODE,
model: 'claude-3-opus',
provider: Provider.ANTHROPIC,
estimated_input_tokens: 2000,
estimated_output_tokens: 1000,
actual_input_tokens: 2200,
actual_output_tokens: 1100,
estimated_cost_usd_micros: 100000,
actual_cost_usd_micros: 110000,
quality_gate_passed: true,
quality_gates_run: [QualityGate.BUILD, QualityGate.TEST, QualityGate.LINT],
quality_gates_failed: [],
context_compactions: 2,
context_rotations: 1,
context_utilization_final: 0.75,
outcome: Outcome.SUCCESS,
retry_count: 0,
language: 'typescript',
repo_size_category: RepoSizeCategory.MEDIUM,
});
expect(event.task_type).toBe(TaskType.IMPLEMENTATION);
expect(event.complexity).toBe(Complexity.HIGH);
expect(event.model).toBe('claude-3-opus');
expect(event.quality_gates_run).toEqual([
QualityGate.BUILD,
QualityGate.TEST,
QualityGate.LINT,
]);
expect(event.language).toBe('typescript');
expect(event.repo_size_category).toBe(RepoSizeCategory.MEDIUM);
});
it('should auto-generate event_id as UUID', () => {
const builder = new EventBuilder(makeConfig());
const event = builder.build({
task_duration_ms: 1000,
task_type: TaskType.TESTING,
complexity: Complexity.LOW,
harness: Harness.AIDER,
model: 'gpt-4',
provider: Provider.OPENAI,
estimated_input_tokens: 100,
estimated_output_tokens: 50,
actual_input_tokens: 100,
actual_output_tokens: 50,
estimated_cost_usd_micros: 1000,
actual_cost_usd_micros: 1000,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.3,
outcome: Outcome.SUCCESS,
retry_count: 0,
});
// UUID format: 8-4-4-4-12 hex chars
expect(event.event_id).toMatch(
/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/,
);
// Each event should get a unique ID
const event2 = builder.build({
task_duration_ms: 1000,
task_type: TaskType.TESTING,
complexity: Complexity.LOW,
harness: Harness.AIDER,
model: 'gpt-4',
provider: Provider.OPENAI,
estimated_input_tokens: 100,
estimated_output_tokens: 50,
actual_input_tokens: 100,
actual_output_tokens: 50,
estimated_cost_usd_micros: 1000,
actual_cost_usd_micros: 1000,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.3,
outcome: Outcome.SUCCESS,
retry_count: 0,
});
expect(event.event_id).not.toBe(event2.event_id);
});
it('should auto-set timestamp to ISO 8601', () => {
const now = new Date('2026-02-07T10:00:00.000Z');
vi.setSystemTime(now);
const builder = new EventBuilder(makeConfig());
const event = builder.build({
task_duration_ms: 1000,
task_type: TaskType.DEBUGGING,
complexity: Complexity.MEDIUM,
harness: Harness.OPENCODE,
model: 'claude-3-sonnet',
provider: Provider.ANTHROPIC,
estimated_input_tokens: 500,
estimated_output_tokens: 200,
actual_input_tokens: 500,
actual_output_tokens: 200,
estimated_cost_usd_micros: 5000,
actual_cost_usd_micros: 5000,
quality_gate_passed: false,
quality_gates_run: [QualityGate.TEST],
quality_gates_failed: [QualityGate.TEST],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.4,
outcome: Outcome.FAILURE,
retry_count: 1,
});
expect(event.timestamp).toBe('2026-02-07T10:00:00.000Z');
});
it('should set instance_id from config', () => {
const config = makeConfig();
const builder = new EventBuilder(config);
const event = builder.build({
task_duration_ms: 1000,
task_type: TaskType.PLANNING,
complexity: Complexity.LOW,
harness: Harness.UNKNOWN,
model: 'test-model',
provider: Provider.UNKNOWN,
estimated_input_tokens: 0,
estimated_output_tokens: 0,
actual_input_tokens: 0,
actual_output_tokens: 0,
estimated_cost_usd_micros: 0,
actual_cost_usd_micros: 0,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0,
outcome: Outcome.SUCCESS,
retry_count: 0,
});
expect(event.instance_id).toBe('my-instance-uuid');
});
it('should set schema_version to 1.0', () => {
const builder = new EventBuilder(makeConfig());
const event = builder.build({
task_duration_ms: 1000,
task_type: TaskType.REFACTORING,
complexity: Complexity.CRITICAL,
harness: Harness.KILO_CODE,
model: 'gemini-pro',
provider: Provider.GOOGLE,
estimated_input_tokens: 3000,
estimated_output_tokens: 2000,
actual_input_tokens: 3000,
actual_output_tokens: 2000,
estimated_cost_usd_micros: 80000,
actual_cost_usd_micros: 80000,
quality_gate_passed: true,
quality_gates_run: [QualityGate.TYPECHECK],
quality_gates_failed: [],
context_compactions: 5,
context_rotations: 2,
context_utilization_final: 0.95,
outcome: Outcome.SUCCESS,
retry_count: 0,
});
expect(event.schema_version).toBe('1.0');
});
});

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import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { PredictionCache } from '../src/prediction-cache.js';
import { PredictionQuery, PredictionResponse } from '../src/types/predictions.js';
import { TaskType, Complexity, Provider } from '../src/types/events.js';
function makeQuery(overrides: Partial<PredictionQuery> = {}): PredictionQuery {
return {
task_type: TaskType.IMPLEMENTATION,
model: 'claude-3-opus',
provider: Provider.ANTHROPIC,
complexity: Complexity.MEDIUM,
...overrides,
};
}
function makeResponse(sampleSize = 100): PredictionResponse {
return {
prediction: {
input_tokens: { p10: 500, p25: 750, median: 1000, p75: 1500, p90: 2000 },
output_tokens: { p10: 200, p25: 350, median: 500, p75: 750, p90: 1000 },
cost_usd_micros: { median: 50000 },
duration_ms: { median: 30000 },
correction_factors: { input: 1.1, output: 1.05 },
quality: { gate_pass_rate: 0.85, success_rate: 0.9 },
},
metadata: {
sample_size: sampleSize,
fallback_level: 0,
confidence: 'high',
last_updated: new Date().toISOString(),
cache_hit: false,
},
};
}
describe('PredictionCache', () => {
beforeEach(() => {
vi.useFakeTimers();
});
afterEach(() => {
vi.useRealTimers();
});
it('should return null for cache miss', () => {
const cache = new PredictionCache(60_000);
const result = cache.get(makeQuery());
expect(result).toBeNull();
});
it('should return cached prediction on hit', () => {
const cache = new PredictionCache(60_000);
const query = makeQuery();
const response = makeResponse();
cache.set(query, response);
const result = cache.get(query);
expect(result).toEqual(response);
});
it('should return null when entry has expired', () => {
const cache = new PredictionCache(60_000); // 60s TTL
const query = makeQuery();
const response = makeResponse();
cache.set(query, response);
expect(cache.get(query)).toEqual(response);
// Advance time past TTL
vi.advanceTimersByTime(61_000);
expect(cache.get(query)).toBeNull();
});
it('should differentiate queries by all fields', () => {
const cache = new PredictionCache(60_000);
const query1 = makeQuery({ task_type: TaskType.IMPLEMENTATION });
const query2 = makeQuery({ task_type: TaskType.DEBUGGING });
const response1 = makeResponse(100);
const response2 = makeResponse(200);
cache.set(query1, response1);
cache.set(query2, response2);
expect(cache.get(query1)?.metadata.sample_size).toBe(100);
expect(cache.get(query2)?.metadata.sample_size).toBe(200);
});
it('should clear all entries', () => {
const cache = new PredictionCache(60_000);
cache.set(makeQuery(), makeResponse());
cache.set(makeQuery({ task_type: TaskType.TESTING }), makeResponse());
expect(cache.size).toBe(2);
cache.clear();
expect(cache.size).toBe(0);
expect(cache.get(makeQuery())).toBeNull();
});
it('should overwrite existing entry with same query', () => {
const cache = new PredictionCache(60_000);
const query = makeQuery();
cache.set(query, makeResponse(100));
cache.set(query, makeResponse(200));
expect(cache.size).toBe(1);
expect(cache.get(query)?.metadata.sample_size).toBe(200);
});
it('should clean expired entry on get', () => {
const cache = new PredictionCache(60_000);
const query = makeQuery();
cache.set(query, makeResponse());
expect(cache.size).toBe(1);
vi.advanceTimersByTime(61_000);
// get() should clean up
cache.get(query);
expect(cache.size).toBe(0);
});
});

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import { describe, it, expect } from 'vitest';
import { EventQueue } from '../src/queue.js';
import {
TaskType,
Complexity,
Harness,
Provider,
Outcome,
TaskCompletionEvent,
} from '../src/types/events.js';
function makeEvent(id: string): TaskCompletionEvent {
return {
instance_id: 'test-instance',
event_id: id,
schema_version: '1.0',
timestamp: new Date().toISOString(),
task_duration_ms: 1000,
task_type: TaskType.IMPLEMENTATION,
complexity: Complexity.MEDIUM,
harness: Harness.CLAUDE_CODE,
model: 'claude-3-opus',
provider: Provider.ANTHROPIC,
estimated_input_tokens: 1000,
estimated_output_tokens: 500,
actual_input_tokens: 1100,
actual_output_tokens: 550,
estimated_cost_usd_micros: 50000,
actual_cost_usd_micros: 55000,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.5,
outcome: Outcome.SUCCESS,
retry_count: 0,
};
}
describe('EventQueue', () => {
it('should enqueue and drain events', () => {
const queue = new EventQueue(10);
const event = makeEvent('e1');
queue.enqueue(event);
expect(queue.size).toBe(1);
expect(queue.isEmpty).toBe(false);
const drained = queue.drain(10);
expect(drained).toHaveLength(1);
expect(drained[0].event_id).toBe('e1');
expect(queue.isEmpty).toBe(true);
});
it('should respect maxSize with FIFO eviction', () => {
const queue = new EventQueue(3);
queue.enqueue(makeEvent('e1'));
queue.enqueue(makeEvent('e2'));
queue.enqueue(makeEvent('e3'));
expect(queue.size).toBe(3);
// Adding a 4th should evict the oldest (e1)
queue.enqueue(makeEvent('e4'));
expect(queue.size).toBe(3);
const drained = queue.drain(10);
expect(drained.map((e) => e.event_id)).toEqual(['e2', 'e3', 'e4']);
});
it('should drain up to maxItems', () => {
const queue = new EventQueue(10);
queue.enqueue(makeEvent('e1'));
queue.enqueue(makeEvent('e2'));
queue.enqueue(makeEvent('e3'));
const drained = queue.drain(2);
expect(drained).toHaveLength(2);
expect(drained.map((e) => e.event_id)).toEqual(['e1', 'e2']);
expect(queue.size).toBe(1);
});
it('should remove drained items from the queue', () => {
const queue = new EventQueue(10);
queue.enqueue(makeEvent('e1'));
queue.enqueue(makeEvent('e2'));
queue.drain(1);
expect(queue.size).toBe(1);
const remaining = queue.drain(10);
expect(remaining[0].event_id).toBe('e2');
});
it('should report isEmpty correctly', () => {
const queue = new EventQueue(5);
expect(queue.isEmpty).toBe(true);
queue.enqueue(makeEvent('e1'));
expect(queue.isEmpty).toBe(false);
queue.drain(1);
expect(queue.isEmpty).toBe(true);
});
it('should report size correctly', () => {
const queue = new EventQueue(10);
expect(queue.size).toBe(0);
queue.enqueue(makeEvent('e1'));
expect(queue.size).toBe(1);
queue.enqueue(makeEvent('e2'));
expect(queue.size).toBe(2);
queue.drain(1);
expect(queue.size).toBe(1);
});
it('should return empty array when draining empty queue', () => {
const queue = new EventQueue(5);
const drained = queue.drain(10);
expect(drained).toEqual([]);
});
it('should prepend events to the front of the queue', () => {
const queue = new EventQueue(10);
queue.enqueue(makeEvent('e3'));
queue.prepend([makeEvent('e1'), makeEvent('e2')]);
expect(queue.size).toBe(3);
const drained = queue.drain(10);
expect(drained.map((e) => e.event_id)).toEqual(['e1', 'e2', 'e3']);
});
it('should respect maxSize when prepending', () => {
const queue = new EventQueue(3);
queue.enqueue(makeEvent('e3'));
queue.enqueue(makeEvent('e4'));
// Only 1 slot available, so only first event should be prepended
queue.prepend([makeEvent('e1'), makeEvent('e2')]);
expect(queue.size).toBe(3);
const drained = queue.drain(10);
expect(drained.map((e) => e.event_id)).toEqual(['e1', 'e3', 'e4']);
});
});

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import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { BatchSubmitter } from '../src/submitter.js';
import { ResolvedConfig } from '../src/config.js';
import {
TaskCompletionEvent,
TaskType,
Complexity,
Harness,
Provider,
Outcome,
} from '../src/types/events.js';
function makeConfig(overrides: Partial<ResolvedConfig> = {}): ResolvedConfig {
return {
serverUrl: 'https://tel.example.com',
apiKey: 'a'.repeat(64),
instanceId: 'test-instance-id',
enabled: true,
submitIntervalMs: 300_000,
maxQueueSize: 1000,
batchSize: 100,
requestTimeoutMs: 10_000,
predictionCacheTtlMs: 21_600_000,
dryRun: false,
maxRetries: 3,
onError: () => {},
...overrides,
};
}
function makeEvent(id = 'evt-1'): TaskCompletionEvent {
return {
instance_id: 'test-instance-id',
event_id: id,
schema_version: '1.0',
timestamp: new Date().toISOString(),
task_duration_ms: 5000,
task_type: TaskType.IMPLEMENTATION,
complexity: Complexity.MEDIUM,
harness: Harness.CLAUDE_CODE,
model: 'claude-3-opus',
provider: Provider.ANTHROPIC,
estimated_input_tokens: 1000,
estimated_output_tokens: 500,
actual_input_tokens: 1100,
actual_output_tokens: 550,
estimated_cost_usd_micros: 50000,
actual_cost_usd_micros: 55000,
quality_gate_passed: true,
quality_gates_run: [],
quality_gates_failed: [],
context_compactions: 0,
context_rotations: 0,
context_utilization_final: 0.5,
outcome: Outcome.SUCCESS,
retry_count: 0,
};
}
describe('BatchSubmitter', () => {
let fetchSpy: ReturnType<typeof vi.fn>;
beforeEach(() => {
vi.useFakeTimers();
fetchSpy = vi.fn();
vi.stubGlobal('fetch', fetchSpy);
});
afterEach(() => {
vi.useRealTimers();
vi.unstubAllGlobals();
});
it('should submit a batch successfully', async () => {
const responseBody = {
accepted: 1,
rejected: 0,
results: [{ event_id: 'evt-1', status: 'accepted' }],
};
fetchSpy.mockResolvedValueOnce({
ok: true,
status: 202,
json: () => Promise.resolve(responseBody),
});
const submitter = new BatchSubmitter(makeConfig());
const result = await submitter.submit([makeEvent()]);
expect(result.success).toBe(true);
expect(result.response).toEqual(responseBody);
expect(fetchSpy).toHaveBeenCalledTimes(1);
const [url, options] = fetchSpy.mock.calls[0];
expect(url).toBe('https://tel.example.com/v1/events/batch');
expect(options.method).toBe('POST');
expect(options.headers['Authorization']).toBe(`Bearer ${'a'.repeat(64)}`);
});
it('should handle 429 with Retry-After header', async () => {
const headers = new Map([['Retry-After', '1']]);
fetchSpy.mockResolvedValueOnce({
ok: false,
status: 429,
headers: { get: (name: string) => headers.get(name) ?? null },
});
// After retry, succeed
const responseBody = {
accepted: 1,
rejected: 0,
results: [{ event_id: 'evt-1', status: 'accepted' }],
};
fetchSpy.mockResolvedValueOnce({
ok: true,
status: 202,
json: () => Promise.resolve(responseBody),
});
const submitter = new BatchSubmitter(makeConfig({ maxRetries: 1 }));
// Run submit in background and advance timers
const submitPromise = submitter.submit([makeEvent()]);
// Advance enough to cover Retry-After (1s) + backoff with jitter (~1-1.5s)
await vi.advanceTimersByTimeAsync(10_000);
const result = await submitPromise;
expect(result.success).toBe(true);
expect(fetchSpy).toHaveBeenCalledTimes(2);
});
it('should handle 403 error', async () => {
fetchSpy.mockResolvedValueOnce({
ok: false,
status: 403,
statusText: 'Forbidden',
});
const submitter = new BatchSubmitter(makeConfig({ maxRetries: 0 }));
const result = await submitter.submit([makeEvent()]);
expect(result.success).toBe(false);
expect(result.error?.message).toContain('Forbidden');
expect(result.error?.message).toContain('403');
});
it('should retry on network error with backoff', async () => {
fetchSpy.mockRejectedValueOnce(new Error('Network error'));
fetchSpy.mockResolvedValueOnce({
ok: true,
status: 202,
json: () =>
Promise.resolve({
accepted: 1,
rejected: 0,
results: [{ event_id: 'evt-1', status: 'accepted' }],
}),
});
const submitter = new BatchSubmitter(makeConfig({ maxRetries: 1 }));
const submitPromise = submitter.submit([makeEvent()]);
// Advance past backoff delay
await vi.advanceTimersByTimeAsync(5000);
const result = await submitPromise;
expect(result.success).toBe(true);
expect(fetchSpy).toHaveBeenCalledTimes(2);
});
it('should fail after max retries exhausted', async () => {
fetchSpy.mockRejectedValue(new Error('Network error'));
const submitter = new BatchSubmitter(makeConfig({ maxRetries: 2 }));
const submitPromise = submitter.submit([makeEvent()]);
// Advance timers to allow all retries
await vi.advanceTimersByTimeAsync(120_000);
const result = await submitPromise;
expect(result.success).toBe(false);
expect(result.error?.message).toBe('Network error');
});
it('should not call fetch in dryRun mode', async () => {
const submitter = new BatchSubmitter(makeConfig({ dryRun: true }));
const result = await submitter.submit([makeEvent('evt-1'), makeEvent('evt-2')]);
expect(result.success).toBe(true);
expect(result.response?.accepted).toBe(2);
expect(result.response?.rejected).toBe(0);
expect(fetchSpy).not.toHaveBeenCalled();
});
it('should handle request timeout via AbortController', async () => {
fetchSpy.mockImplementation(
(_url: string, options: { signal: AbortSignal }) =>
new Promise((_resolve, reject) => {
options.signal.addEventListener('abort', () => {
reject(new DOMException('The operation was aborted.', 'AbortError'));
});
}),
);
const submitter = new BatchSubmitter(
makeConfig({ requestTimeoutMs: 1000, maxRetries: 0 }),
);
const submitPromise = submitter.submit([makeEvent()]);
await vi.advanceTimersByTimeAsync(2000);
const result = await submitPromise;
expect(result.success).toBe(false);
expect(result.error?.message).toContain('aborted');
});
});