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@@ -1,69 +1,121 @@
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// k6 load test — POST /v1/track against the local cdp-ingest service.
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// k6 load test simulating realistic e-commerce traffic for 5 shoppers.
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//
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// Each VU plays one shopper with a stable userId + anonymousId. Per iteration
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// the shopper fires a random Segment-spec event from a small catalog
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// (Product Viewed / Product Added / Order Completed), then "thinks" for a
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// short while before the next action.
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//
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// Usage:
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// brew install k6 # one-time
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// k6 run tests/k6/track.js # defaults: 50 CCU, 1m
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// brew install k6
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// k6 run tests/k6/track.js
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//
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// Override at the CLI:
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// Overrides:
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// k6 run -e WRITE_KEY=xxx -e BASE=http://localhost:3049 \
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// -e VUS=100 -e DURATION=2m tests/k6/track.js
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// -e VUS=5 -e DURATION=2m tests/k6/track.js
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import http from 'k6/http';
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import { check } from 'k6';
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import { check, sleep } from 'k6';
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import { randomItem, randomIntBetween } from 'https://jslib.k6.io/k6-utils/1.4.0/index.js';
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import encoding from 'k6/encoding';
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const BASE = __ENV.BASE ?? 'http://localhost:3049';
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const WRITE_KEY = __ENV.WRITE_KEY ?? 'cdp_dev_writekey_1234567890';
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const VUS = parseInt(__ENV.VUS ?? '50', 10);
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const DURATION = __ENV.DURATION ?? '1m';
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const BASE = __ENV.BASE ?? 'http://localhost:3049';
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const WRITE_KEY = __ENV.WRITE_KEY ?? 'cdp_dev_writekey_1234567890';
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const VUS = parseInt(__ENV.VUS ?? '5', 10);
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const DURATION = __ENV.DURATION ?? '1m';
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// Segment-compatible auth: Basic base64(writeKey + ":")
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const AUTH = 'Basic ' + encoding.b64encode(`${WRITE_KEY}:`);
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export const options = {
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scenarios: {
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constant_load: {
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shoppers: {
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executor: 'constant-vus',
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vus: VUS,
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duration: DURATION,
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},
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},
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thresholds: {
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http_req_failed: ['rate<0.01'], // < 1% errors
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http_req_duration: ['p(95)<300', 'p(99)<800'],
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http_req_failed: ['rate<0.01'],
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http_req_duration: ['p(95)<500', 'p(99)<1500'],
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checks: ['rate>0.99'],
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},
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};
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// ---------------------------------------------------------------------------
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// Fixtures
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// ---------------------------------------------------------------------------
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const SHOPPERS = [
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{ user_id: 'u_001', email: 'alice@example.com', plan: 'pro', country: 'US' },
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{ user_id: 'u_002', email: 'bob@example.com', plan: 'free', country: 'VN' },
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{ user_id: 'u_003', email: 'charlie@example.com', plan: 'pro', country: 'GB' },
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{ user_id: 'u_004', email: 'dana@example.com', plan: 'free', country: 'SG' },
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{ user_id: 'u_005', email: 'eric@example.com', plan: 'team', country: 'JP' },
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];
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const PRODUCTS = [
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{ id: 'sku_alpha', name: 'Alpha Hoodie', category: 'apparel', brand: 'CDP', price: 49.0 },
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{ id: 'sku_beta', name: 'Beta Mug', category: 'drinkware', brand: 'CDP', price: 12.5 },
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{ id: 'sku_gamma', name: 'Gamma Backpack', category: 'bags', brand: 'CDP', price: 89.0 },
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{ id: 'sku_delta', name: 'Delta Sneakers', category: 'footwear', brand: 'Athleta', price: 129.0 },
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{ id: 'sku_eps', name: 'Epsilon Headset', category: 'electronics',brand: 'Sonix', price: 199.0 },
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];
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const EVENT_KINDS = ['Product Viewed', 'Product Added', 'Order Completed'];
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// ---------------------------------------------------------------------------
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// Per-iteration
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// ---------------------------------------------------------------------------
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export default function () {
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// Stable per-VU identity. __VU starts at 1.
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const shopper = SHOPPERS[(__VU - 1) % SHOPPERS.length];
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const anonymousId = `anon_${shopper.user_id}`;
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const eventName = randomItem(EVENT_KINDS);
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let properties;
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switch (eventName) {
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case 'Product Viewed':
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properties = productProps(randomItem(PRODUCTS));
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break;
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case 'Product Added':
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properties = {
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...productProps(randomItem(PRODUCTS)),
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quantity: randomIntBetween(1, 3),
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};
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break;
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case 'Order Completed':
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properties = orderProps();
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break;
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}
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const now = new Date().toISOString();
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const messageId = `k6_${__VU}_${__ITER}_${Date.now()}`;
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const messageId = `k6_${shopper.user_id}_${__ITER}_${Date.now()}`;
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const payload = JSON.stringify({
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type: 'track',
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messageId,
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anonymousId: `anon_${__VU}`,
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userId: `user_${__VU}@example.com`,
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event: 'k6 Test Event',
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properties: {
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testProp: 'load test',
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vu: __VU,
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iter: __ITER,
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price: 42.5,
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userId: shopper.user_id,
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anonymousId,
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event: eventName,
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properties,
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traits: {
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email: shopper.email,
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plan: shopper.plan,
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country: shopper.country,
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},
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timestamp: now,
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sentAt: now,
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context: {
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library_name: 'k6',
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library_version: '0.1.0',
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library_name: 'k6-ecommerce-sim',
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library_version: '0.2.0',
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ip: '127.0.0.1',
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userAgent: 'k6/loadtest',
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locale: 'en-US',
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page: {
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path: '/',
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host: 'example.com',
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title: 'Example page',
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url: 'https://example.com/',
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path: '/checkout',
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host: 'shop.example.com',
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title: 'Shop',
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url: 'https://shop.example.com/checkout',
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},
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},
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});
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@@ -73,6 +125,7 @@ export default function () {
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'Content-Type': 'application/json',
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Authorization: AUTH,
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},
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tags: { event: eventName },
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});
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check(res, {
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@@ -80,4 +133,51 @@ export default function () {
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'body ok': (r) => r.json('ok') === true,
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'fast (<500ms)': (r) => r.timings.duration < 500,
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});
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// Think time -- a real shopper does not click 100x/sec.
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sleep(randomIntBetween(1, 4));
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}
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// ---------------------------------------------------------------------------
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// Helpers
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// ---------------------------------------------------------------------------
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function productProps(p) {
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return {
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product_id: p.id,
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sku: p.id,
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name: p.name,
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category: p.category,
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brand: p.brand,
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price: p.price,
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currency: 'USD',
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};
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}
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function orderProps() {
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// 1 - 3 line items
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const lines = [];
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const n = randomIntBetween(1, 3);
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let total = 0;
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for (let i = 0; i < n; i++) {
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const p = randomItem(PRODUCTS);
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const qty = randomIntBetween(1, 2);
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total += p.price * qty;
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lines.push({
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product_id: p.id,
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sku: p.id,
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name: p.name,
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price: p.price,
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quantity: qty,
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});
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}
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return {
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order_id: `ord_${Date.now()}_${randomIntBetween(1000, 9999)}`,
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revenue: Number(total.toFixed(2)),
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currency: 'USD',
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tax: Number((total * 0.08).toFixed(2)),
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shipping: 5,
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total: Number((total + total * 0.08 + 5).toFixed(2)),
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products: lines,
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};
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}
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