[FIX] bus: mock websocket worker during tests

The bus service communicates with the websocket worker in
order to deliver messages coming from the bus. Most of the
time, it is using a `SharedWorker` but when this kind of
worker is not available, it fallbacks on a `Worker`.

During tests, the `SharedWorker` is mocked to prevent opening
websockets on the server. However, the `Worker` is not.

Since [1], opening websockets during tests is forbidden thus,
any test relying on `Worker` and expecting a connection to be
established would fail.

This PR solves this issue by mocking the `Worker` constructor
as well.

[1]: https://github.com/odoo/odoo/pull/141519

closes odoo/odoo#143988

X-original-commit: 1c67542decb1b6ad38fd15532cb6ac82417ca6dc
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>
Signed-off-by: Matthieu Stockbauer (tsm) <tsm@odoo.com>

addons/bus/static/tests/helpers/mock_websocket.js

@@ -55,6 +55,14 @@ class SharedWorkerMock extends EventTarget {
     }
 }
 
+class WorkerMock extends SharedWorkerMock {
+    constructor(websocketWorker) {
+        super(websocketWorker);
+        this.port.start();
+        this.postMessage = this.port.postMessage.bind(this.port);
+    }
+}
+
 let websocketWorker;
 /**
  * @param {*} params Parameters used to patch the websocket worker.
@@ -81,6 +89,14 @@ export function patchWebsocketWorkerWithCleanup(params = {}) {
             });
             return sharedWorker;
         },
+        Worker: function () {
+            const worker = new WorkerMock(websocketWorker);
+            registerCleanup(() => {
+                worker._messageChannel.port1.close();
+                worker._messageChannel.port2.close();
+            });
+            return worker;
+        },
     });
     registerCleanup(() => {
         if (websocketWorker) {