269 lines
15 KiB
JavaScript
269 lines
15 KiB
JavaScript
// Backend/tests/k6/video-watching-load-test.js
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//
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// จำลองนักเรียนหลายคนดูวีดีโอพร้อมกัน (Concurrent Video Watching)
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//
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// Flow จริงที่ simulate:
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// 1. Login ด้วย account ของ student แต่ละคน
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// 2. Load หน้าเรียนคอร์ส (getCourseLearning)
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// 3. เปิดบทเรียนวีดีโอ (getLessonContent)
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// 4. Save progress ทุก 5 วินาที (จำลองการ watch)
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// 5. เมื่อดูครบ (≥90%) → mark lesson complete
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//
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// Usage:
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// k6 run -e APP_URL=http://localhost:4000 -e COURSE_ID=1 -e LESSON_ID=1 tests/k6/video-watching-load-test.js
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//
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// ปรับจำนวน VUs และ duration ได้ด้วย:
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// k6 run -e APP_URL=http://localhost:4000 -e COURSE_ID=1 -e LESSON_ID=1 --vus 30 --duration 2m tests/k6/video-watching-load-test.js
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import http from 'k6/http';
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import { check, sleep, group } from 'k6';
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import { Rate, Trend, Counter } from 'k6/metrics';
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import { SharedArray } from 'k6/data';
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// ─── Custom Metrics ───────────────────────────────────────────────────────────
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const errorRate = new Rate('errors');
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const loginTime = new Trend('login_duration', true);
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const courseLearningTime = new Trend('course_learning_duration', true);
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const lessonLoadTime = new Trend('lesson_load_duration', true);
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const progressSaveTime = new Trend('progress_save_duration', true);
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const completeLessonTime = new Trend('complete_lesson_duration', true);
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const completedCount = new Counter('completed_lessons');
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const progressSaveCount = new Counter('progress_saves');
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const videoLoadTime = new Trend('video_load_duration', true);
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// ─── Load student credentials ────────────────────────────────────────────────
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// อ่านจาก test-credentials.json (50 accounts)
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const students = new SharedArray('students', function () {
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return JSON.parse(open('./test-credentials.json')).students;
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});
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// ─── Config ───────────────────────────────────────────────────────────────────
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const BASE_URL = __ENV.APP_URL || 'http://192.168.1.137:4000';
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const COURSE_ID = __ENV.COURSE_ID || '1';
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const LESSON_ID = __ENV.LESSON_ID || '1';
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// วีดีโอความยาว (วินาที) — ปรับตามจริง
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const VIDEO_DURATION_SECONDS = parseInt(__ENV.VIDEO_DURATION || '98'); // default 5 นาที
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// save progress interval: ทุก 5 วินาที (เหมือน client จริง)
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// แต่ในการ test เราจะ simulate เร็วขึ้นโดยใช้ sleep น้อยลง
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const PROGRESS_INTERVAL_SECONDS = parseInt(__ENV.PROGRESS_INTERVAL || '15');
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// ─── Test Options ─────────────────────────────────────────────────────────────
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export const options = {
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stages: [
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{ duration: '30s', target: 10 }, // Ramp up: 10 คนเริ่มดูวีดีโอ
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{ duration: '1m', target: 30 }, // Ramp up: เพิ่มเป็น 30 คน
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{ duration: '2m', target: 30 }, // Steady: 30 คนดูพร้อมกัน
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{ duration: '30s', target: 50 }, // Peak: เพิ่มเป็น 50 คน
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{ duration: '1m', target: 50 }, // Steady Peak: 50 คนพร้อมกัน
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{ duration: '30s', target: 0 }, // Ramp down
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],
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thresholds: {
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// Response times
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'login_duration': ['p(95)<2000'], // Login < 2s
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'course_learning_duration': ['p(95)<1000'], // Load course page < 1s
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'lesson_load_duration': ['p(95)<1000'], // Load lesson < 1s
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'video_load_duration': ['p(95)<3000'], // Fetch video from MinIO < 3s
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'progress_save_duration': ['p(95)<500'], // Save progress < 500ms (critical — บ่อย)
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'complete_lesson_duration': ['p(95)<1000'], // Complete lesson < 1s
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// Error rate
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'errors': ['rate<0.05'], // Error < 5%
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'http_req_failed': ['rate<0.05'], // HTTP error < 5%
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},
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};
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// ─── Helper ───────────────────────────────────────────────────────────────────
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function jsonHeaders(token) {
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const h = { 'Content-Type': 'application/json' };
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if (token) h['Authorization'] = `Bearer ${token}`;
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return h;
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}
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// ─── Per-VU persistent state (จำข้ามรอบ iteration) ──────────────────────────
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// ตัวแปรนี้อยู่ระดับ module → k6 สร้างแยกต่างหากสำหรับแต่ละ VU
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// ค่าจะถูกจำไว้ตลอดอายุของ VU (ข้ามหลายรอบ iteration)
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let vuToken = null; // token ที่ login ไว้แล้ว
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let vuSetupDone = false; // เคย load course+lesson แล้วหรือยัง
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let vuProgress = 0; // ตำแหน่งวีดีโอปัจจุบัน (วินาที)
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let vuCompleted = false; // lesson complete แล้วหรือยัง
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// ─── Main ─────────────────────────────────────────────────────────────────────
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export default function () {
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const student = students[__VU % students.length];
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// ── Step 1: Login (ทำครั้งเดียวตอน VU เริ่มต้น หรือถ้า token หาย) ─────────
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if (!vuToken) {
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group('1. Login', () => {
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const res = http.post(
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`${BASE_URL}/api/auth/login`,
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JSON.stringify({ email: student.email, password: student.password }),
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{ headers: jsonHeaders(null) }
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);
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loginTime.add(res.timings.duration);
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const ok = res.status === 200;
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errorRate.add(!ok);
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check(res, {
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'login: status 200': (r) => r.status === 200,
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'login: has token': (r) => { try { return !!r.json('data.token'); } catch { return false; } },
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});
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if (ok) {
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try { vuToken = res.json('data.token'); } catch {}
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}
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});
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if (!vuToken) {
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console.warn(`[VU ${__VU}] Login failed for ${student.email} — skipping`);
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sleep(2);
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return;
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}
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}
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// ── Step 2 (removed): Enroll ทำผ่าน enroll-load-test.js แยกต่างหาก ─────────
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// ── Step 3+4: Setup — Load course และ open lesson (ทำครั้งเดียวต่อ VU) ─────
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if (!vuSetupDone) {
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group('3. Load Course Learning Page', () => {
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const res = http.get(
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`${BASE_URL}/api/students/courses/${COURSE_ID}/learn`,
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{ headers: jsonHeaders(vuToken) }
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);
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courseLearningTime.add(res.timings.duration);
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errorRate.add(res.status !== 200);
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check(res, { 'course learn: status 200': (r) => r.status === 200 });
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});
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sleep(1);
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let videoUrl = null;
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group('4. Open Lesson', () => {
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const res = http.get(
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`${BASE_URL}/api/students/courses/${COURSE_ID}/lessons/${LESSON_ID}`,
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{ headers: jsonHeaders(vuToken) }
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);
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lessonLoadTime.add(res.timings.duration);
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errorRate.add(res.status !== 200);
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check(res, { 'lesson: status 200': (r) => r.status === 200 });
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if (res.status === 200) {
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try { videoUrl = res.json('data.video_url'); } catch {}
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}
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});
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// ── Step 4.5: Fetch video จาก MinIO ──────────────────────────────────────
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if (videoUrl) {
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group('4.5 Fetch Video from MinIO', () => {
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const res = http.get(videoUrl, {
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headers: { 'Range': 'bytes=0-1048575' }, // ขอแค่ 1MB แรก
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timeout: '10s',
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});
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videoLoadTime.add(res.timings.duration);
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const ok = res.status === 200 || res.status === 206;
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errorRate.add(!ok);
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check(res, {
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'minio video: 200 or 206': (r) => r.status === 200 || r.status === 206,
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'minio video: fast': (r) => r.timings.duration < 3000,
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});
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});
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} else {
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console.log(`[VU ${__VU}] No video_url returned — skipping MinIO fetch`);
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}
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sleep(2); // รอ buffer เริ่มต้น
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vuSetupDone = true;
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}
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// ── Step 5: Save Progress ทีละ tick (ต่อจากตำแหน่งเดิม) ────────────────────
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// แต่ละ iteration ของ VU = ส่ง progress 1 ครั้ง แล้ว sleep ตาม interval จริง
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if (!vuCompleted) {
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vuProgress += PROGRESS_INTERVAL_SECONDS;
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group('5. Watch Video (Save Progress)', () => {
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const res = http.post(
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`${BASE_URL}/api/students/lessons/${LESSON_ID}/progress`,
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JSON.stringify({
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video_progress_seconds: vuProgress,
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video_duration_seconds: VIDEO_DURATION_SECONDS,
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}),
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{ headers: jsonHeaders(vuToken) }
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);
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progressSaveTime.add(res.timings.duration);
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progressSaveCount.add(1);
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const ok = res.status === 200;
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errorRate.add(!ok);
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check(res, {
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'progress save: status 200': (r) => r.status === 200,
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'progress save: fast': (r) => r.timings.duration < 500,
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});
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console.log(`[VU ${__VU}] progress: ${vuProgress}s / ${VIDEO_DURATION_SECONDS}s (${Math.round(vuProgress / VIDEO_DURATION_SECONDS * 100)}%)`);
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});
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// ── Step 6: Mark complete เมื่อดูครบ ≥95% ──────────────────────────────
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if (vuProgress >= VIDEO_DURATION_SECONDS * 0.95) {
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group('6. Complete Lesson', () => {
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const res = http.post(
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`${BASE_URL}/api/students/courses/${COURSE_ID}/lessons/${LESSON_ID}/complete`,
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null,
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{ headers: jsonHeaders(vuToken) }
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);
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completeLessonTime.add(res.timings.duration);
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errorRate.add(res.status !== 200 && res.status !== 409);
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if (res.status === 200) completedCount.add(1);
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check(res, {
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'complete: status 200 or 409': (r) => r.status === 200 || r.status === 409,
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});
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});
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vuCompleted = true;
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console.log(`[VU ${__VU}] ✓ Lesson completed`);
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}
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}
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// sleep ตาม interval จริง — ทุก VU ส่ง progress ทุก PROGRESS_INTERVAL_SECONDS วินาที
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sleep(PROGRESS_INTERVAL_SECONDS);
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}
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// ─── Summary ──────────────────────────────────────────────────────────────────
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export function handleSummary(data) {
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const m = data.metrics;
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const avg = (k) => m[k]?.values?.avg?.toFixed(0) ?? 'N/A';
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const p95 = (k) => m[k]?.values?.['p(95)']?.toFixed(0) ?? 'N/A';
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const rate = (k) => ((m[k]?.values?.rate ?? 0) * 100).toFixed(2);
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const count = (k) => m[k]?.values?.count ?? 0;
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return {
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stdout: `
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╔══════════════════════════════════════════════════════════╗
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║ Concurrent Video Watching — Load Test ║
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╠══════════════════════════════════════════════════════════╣
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║ Course ID : ${COURSE_ID.padEnd(44)}║
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║ Lesson ID : ${LESSON_ID.padEnd(44)}║
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║ Video : ${String(VIDEO_DURATION_SECONDS + 's').padEnd(44)}║
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╠══════════════════════════════════════════════════════════╣
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║ RESPONSE TIMES (avg / p95) ║
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║ Login : ${avg('login_duration')}ms / ${p95('login_duration')}ms${' '.repeat(Math.max(0, 20 - avg('login_duration').length - p95('login_duration').length))}║
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║ Course Learning Page: ${avg('course_learning_duration')}ms / ${p95('course_learning_duration')}ms${' '.repeat(Math.max(0, 20 - avg('course_learning_duration').length - p95('course_learning_duration').length))}║
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║ Lesson Load : ${avg('lesson_load_duration')}ms / ${p95('lesson_load_duration')}ms${' '.repeat(Math.max(0, 20 - avg('lesson_load_duration').length - p95('lesson_load_duration').length))}║
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║ MinIO Video Fetch : ${avg('video_load_duration')}ms / ${p95('video_load_duration')}ms${' '.repeat(Math.max(0, 20 - avg('video_load_duration').length - p95('video_load_duration').length))}║
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║ Save Progress : ${avg('progress_save_duration')}ms / ${p95('progress_save_duration')}ms${' '.repeat(Math.max(0, 20 - avg('progress_save_duration').length - p95('progress_save_duration').length))}║
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║ Complete Lesson : ${avg('complete_lesson_duration')}ms / ${p95('complete_lesson_duration')}ms${' '.repeat(Math.max(0, 20 - avg('complete_lesson_duration').length - p95('complete_lesson_duration').length))}║
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╠══════════════════════════════════════════════════════════╣
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║ COUNTS ║
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║ Total Requests : ${String(count('http_reqs')).padEnd(33)}║
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║ Progress Saves : ${String(count('progress_saves')).padEnd(33)}║
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║ Lessons Completed : ${String(count('completed_lessons')).padEnd(33)}║
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╠══════════════════════════════════════════════════════════╣
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║ ERROR RATES ║
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║ HTTP Failed : ${(rate('http_req_failed') + '%').padEnd(33)}║
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║ Custom Errors : ${(rate('errors') + '%').padEnd(33)}║
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╚══════════════════════════════════════════════════════════╝
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`,
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};
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}
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