Extract worker creation into factories and mack them in tests

__mocks__/workerFactoryMock.js

@@ -0,0 +1,19 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+export default function workerFactory(options) {
+  return jest.fn;
+}

__mocks__/workerMock.js

@@ -1 +0,0 @@
-module.exports = jest.fn();

jest.config.ts

@@ -31,7 +31,7 @@ const config: Config = {
         "decoderWorker\\.min\\.js": "<rootDir>/__mocks__/empty.js",
         "decoderWorker\\.min\\.wasm": "<rootDir>/__mocks__/empty.js",
         "waveWorker\\.min\\.js": "<rootDir>/__mocks__/empty.js",
-        "workers/(.+)\\.worker\\.ts": "<rootDir>/__mocks__/workerMock.js",
+        "workers/(.+)Factory": "<rootDir>/__mocks__/workerFactoryMock.js",
         "^!!raw-loader!.*": "jest-raw-loader",
         "RecorderWorklet": "<rootDir>/__mocks__/empty.js",
     },

src/BlurhashEncoder.ts

@@ -17,6 +17,7 @@ limitations under the License.
 // @ts-ignore - `.ts` is needed here to make TS happy
 import { Request, Response } from "./workers/blurhash.worker.ts";
 import { WorkerManager } from "./WorkerManager";
+import blurhashWorkerFactory from "./workers/blurhashWorkerFactory.js";
 
 export class BlurhashEncoder {
     private static internalInstance = new BlurhashEncoder();
@@ -25,9 +26,7 @@ export class BlurhashEncoder {
         return BlurhashEncoder.internalInstance;
     }
 
-    private readonly worker = new WorkerManager<Request, Response>(
-        new Worker(new URL("./workers/blurhash.worker.ts", import.meta.url)),
-    );
+    private readonly worker = new WorkerManager<Request, Response>(blurhashWorkerFactory());
 
     public getBlurhash(imageData: ImageData): Promise<string> {
         return this.worker.call({ imageData }).then((resp) => resp.blurhash);

src/audio/Playback.ts

@@ -29,6 +29,7 @@ import { createAudioContext, decodeOgg } from "./compat";
 import { clamp } from "../utils/numbers";
 import { WorkerManager } from "../WorkerManager";
 import { DEFAULT_WAVEFORM, PLAYBACK_WAVEFORM_SAMPLES } from "./consts";
+import playbackWorkerFactory from "../workers/playbackWorkerFactory.js";
 
 export enum PlaybackState {
     Decoding = "decoding",
@@ -63,9 +64,7 @@ export class Playback extends EventEmitter implements IDestroyable, PlaybackInte
     private waveformObservable = new SimpleObservable<number[]>();
     private readonly clock: PlaybackClock;
     private readonly fileSize: number;
-    private readonly worker = new WorkerManager<Request, Response>(
-        new Worker(new URL("../workers/playback.worker.ts", import.meta.url)),
-    );
+    private readonly worker = new WorkerManager<Request, Response>(playbackWorkerFactory());
 
     /**
      * Creates a new playback instance from a buffer.

src/utils/createMatrixClient.ts

@@ -23,6 +23,7 @@ import {
     IndexedDBStore,
     LocalStorageCryptoStore,
 } from "matrix-js-sdk/src/matrix";
+import indexeddbWorkerFactory from "../workers/indexeddbWorkerFactory";
 
 const localStorage = window.localStorage;
 
@@ -52,7 +53,7 @@ export default function createMatrixClient(opts: ICreateClientOpts): MatrixClien
             indexedDB: indexedDB,
             dbName: "riot-web-sync",
             localStorage,
-            workerFactory: () => new Worker(new URL("../workers/indexeddb.worker.ts", import.meta.url)),
+            workerFactory: indexeddbWorkerFactory,
         });
     } else if (localStorage) {
         storeOpts.store = new MemoryStore({ localStorage });

src/workers/blurhashWorkerFactory.ts

@@ -0,0 +1,19 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+export default function blurhashWorkerFactory(options?: WorkerOptions | undefined): Worker {
+  return new Worker(new URL("./workers/blurhash.worker.ts", import.meta.url), options);
+}

src/workers/indexeddbWorkerFactory.ts

@@ -0,0 +1,19 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+export default function blurhashWorkerFactory(options?: WorkerOptions | undefined): Worker {
+  return new Worker(new URL("../workers/indexeddb.worker.ts", import.meta.url), options)
+}

src/workers/playbackWorkerFactory.ts

@@ -0,0 +1,19 @@
+/*
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+export default function blurhashWorkerFactory(options?: WorkerOptions | undefined): Worker {
+  return new Worker(new URL("../workers/playback.worker.ts", import.meta.url), options)
+}

tsconfig.json

@@ -4,7 +4,7 @@
         "emitDecoratorMetadata": false,
         "resolveJsonModule": true,
         "esModuleInterop": true,
-        "module": "commonjs",
+        "module": "es2022",
         "moduleResolution": "node",
         "target": "es2016",
         "noUnusedLocals": true,