feat: Stitcher tests (#12)

packages/stitcher/src/extern/hls-parser/stringify.ts → packages/stitcher/extern/hls-parser/stringify.ts

@@ -13,7 +13,7 @@ import {
   SpliceInfo,
   Variant,
   PostProcess,
-} from "./types";
+} from "./types.js";
 
 const ALLOW_REDUNDANCY = [
   "#EXTINF",

packages/stitcher/jest.config.js

@@ -1,11 +1,22 @@
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+
 /** @type {import('ts-jest').JestConfigWithTsJest} **/
 export default {
-  testEnvironment: "node",
-  transform: {
-    "^.+.tsx?$": ["ts-jest", {}],
-  },
   moduleNameMapper: {
-    "^@src(.*)$": "<rootDir>/src$1",
+    "^(\\.{1,2}/.*)\\.js$": "$1",
+    "@mixwave/artisan/producer":
+      "<rootDir>/test/mocks/import-artisan-producer.ts",
+  },
+  extensionsToTreatAsEsm: [".ts"],
+  transform: {
+    "^.+\\.(mt|t|cj|j)s$": [
+      "ts-jest",
+      {
+        useESM: true,
+      },
+    ],
   },
-  resolver: "jest-ts-webcompat-resolver",
+  prettierPath: require.resolve("jest-prettier"),
 };

packages/stitcher/package.json

@@ -5,21 +5,23 @@
     "build": "tsc",
     "start": "node ./dist/index.js",
     "dev": "tsc-watch --noClear --onSuccess \"node ./dist/index.js\"",
-    "test": "jest"
+    "test": "NODE_OPTIONS=--experimental-vm-modules jest"
   },
   "devDependencies": {
+    "@babel/preset-env": "^7.25.4",
     "@jest/globals": "^29.7.0",
     "@types/find-config": "^1.0.4",
     "@types/hh-mm-ss": "^1.2.3",
     "@types/node": "^22.1.0",
     "@types/parse-filepath": "^1.0.2",
     "@types/uuid": "^10.0.0",
+    "esm": "^3.2.25",
     "fetch-mock": "^11.1.1",
     "jest": "^29.7.0",
-    "jest-ts-webcompat-resolver": "^1.0.0",
     "ts-jest": "^29.2.5",
     "tsc-watch": "^6.2.0",
-    "typescript": "^5.5.4"
+    "typescript": "^5.5.4",
+    "jest-prettier": "npm:prettier@^2"
   },
   "dependencies": {
     "@fastify/cors": "^9.0.1",

packages/stitcher/src/playlist.ts

@@ -1,8 +1,8 @@
-import { parse, stringify } from "./extern/hls-parser/index.js";
+import { parse, stringify } from "../extern/hls-parser/index.js";
 import parseFilepath from "parse-filepath";
-import { Interstitial } from "./extern/hls-parser/types.js";
+import { Interstitial } from "../extern/hls-parser/types.js";
 import { env } from "./env.js";
-import { MasterPlaylist, MediaPlaylist } from "./extern/hls-parser/types.js";
+import { MasterPlaylist, MediaPlaylist } from "../extern/hls-parser/types.js";
 import type { Session } from "./types.js";
 
 async function fetchPlaylist<T>(url: string) {

packages/stitcher/src/session.ts

@@ -1,11 +1,14 @@
 import { client } from "./redis.js";
 import { randomUUID } from "crypto";
-import { getInterstitialsFromVmap } from "./vmap.js";
+import { extractInterstitialFromVmapAdbreak } from "./vast.js";
+import { getVmap } from "./vmap.js";
 import type { Session, Interstitial } from "./types.js";
 
 const REDIS_PREFIX = `stitcher:session`;
 
-const key = (sessionId: string) => `${REDIS_PREFIX}:${sessionId}`;
+function getRedisKey(sessionId: string) {
+  return `${REDIS_PREFIX}:${sessionId}`;
+}
 
 export async function createSession(data: {
   assetId: string;
@@ -18,8 +21,15 @@ export async function createSession(data: {
   const interstitials: Interstitial[] = [];
 
   if (data.vmapUrl) {
-    interstitials.push(...(await getInterstitialsFromVmap(data.vmapUrl)));
+    const vmap = await getVmap(data.vmapUrl);
+
+    for (const adBreak of vmap.adBreaks) {
+      interstitials.push(
+        ...(await extractInterstitialFromVmapAdbreak(adBreak)),
+      );
+    }
   }
+
   if (data.interstitials) {
     interstitials.push(...data.interstitials);
   }
@@ -38,17 +48,21 @@ export async function createSession(data: {
     interstitials,
   } satisfies Session;
 
-  await client.json.set(key(sessionId), `$`, session);
+  const redisKey = getRedisKey(sessionId);
 
-  await client.expire(key(sessionId), 60 * 60 * 6);
+  await client.json.set(redisKey, `$`, session);
+  await client.expire(redisKey, 60 * 60 * 6);
 
   return session;
 }
 
 export async function getSession(sessionId: string) {
-  const data = await client.json.get(key(sessionId));
+  const redisKey = getRedisKey(sessionId);
+
+  const data = await client.json.get(redisKey);
   if (!data) {
     throw new Error("No session found for id");
   }
+
   return data as Session;
 }

packages/stitcher/src/vast.ts

@@ -1,32 +1,30 @@
 import { env } from "./env.js";
 import { addTranscodeJob } from "@mixwave/artisan/producer";
-import { VASTClient } from "./extern/vast-client/index.js";
+import { VASTClient } from "../extern/vast-client/index.js";
 import { DOMParser } from "@xmldom/xmldom";
 import * as uuid from "uuid";
 import { NAMESPACE_UUID_AD } from "./const.js";
-import type { VmapAdBreak, VmapResponse } from "./vmap.js";
+import type { VmapAdBreak } from "./vmap.js";
 import type { Interstitial } from "./types.js";
 import type {
   VastResponse,
   VastCreativeLinear,
   VastAd,
-} from "./extern/vast-client/index.js";
+} from "../extern/vast-client/index.js";
 
-export async function extractInterstitialsFromVmap(vmapResponse: VmapResponse) {
+export async function extractInterstitialFromVmapAdbreak(adBreak: VmapAdBreak) {
   const interstitials: Interstitial[] = [];
 
-  for (const adBreak of vmapResponse.adBreaks) {
-    const adMedias = await getAdMedias(adBreak);
-
-    for (const adMedia of adMedias) {
-      if (await isPackaged(adMedia.assetId)) {
-        interstitials.push({
-          timeOffset: adBreak.timeOffset,
-          assetId: adMedia.assetId,
-        });
-      } else {
-        scheduleForPackage(adMedia);
-      }
+  const adMedias = await getAdMedias(adBreak);
+
+  for (const adMedia of adMedias) {
+    if (await isPackaged(adMedia.assetId)) {
+      interstitials.push({
+        timeOffset: adBreak.timeOffset,
+        assetId: adMedia.assetId,
+      });
+    } else {
+      scheduleForPackage(adMedia);
     }
   }
 
@@ -138,10 +136,14 @@ function getCreative(ad: VastAd) {
 }
 
 function getAdId(creative: VastCreativeLinear) {
-  // Do not change this, or we'll have a mismatch between the already encoded ad's and the other.
-  // See https://iabtechlab.com/guidance-for-uniquely-identifying-creative-asset-ids-in-vast-2/
-  const adId = [creative.adId, creative.id].join(".");
-  return uuid.v5(adId, NAMESPACE_UUID_AD);
+  if (creative.adId && creative.id) {
+    // Do not change this, or we'll have a mismatch between the already encoded ad's and the other.
+    // See https://iabtechlab.com/guidance-for-uniquely-identifying-creative-asset-ids-in-vast-2/
+    const adId = [creative.adId, creative.id].join(".");
+    return uuid.v5(adId, NAMESPACE_UUID_AD);
+  }
+
+  throw new Error("Failed to generate adId");
 }
 
 type AdMedia = {

packages/stitcher/src/vmap.ts

@@ -1,16 +1,10 @@
 import { DOMParser, XMLSerializer } from "@xmldom/xmldom";
-import { extractInterstitialsFromVmap } from "./vast.js";
-import timeFormat from "hh-mm-ss";
+import * as timeFormat from "hh-mm-ss";
 
 const USER_AGENT =
   "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.111 Safari/537.36";
 
-export async function getInterstitialsFromVmap(url: string) {
-  const vmap = await getVmap(url);
-  return await extractInterstitialsFromVmap(vmap);
-}
-
-async function getVmap(url: string): Promise<VmapResponse> {
+export async function getVmap(url: string): Promise<VmapResponse> {
   const doc = await getXml(url);
   const rootElement = doc.documentElement;
 

packages/stitcher/test/mocks/import-artisan-producer.ts

@@ -0,0 +1,3 @@
+import { jest } from "@jest/globals";
+
+export const addTranscodeJob = jest.fn();