test: added test for DecryptionQueue (#8)

src/util/__tests__/DecryptionQueue.test.ts

@@ -0,0 +1,29 @@
+import { DECRYPTION_WORKER_ACTION_NAME } from '~/decrypt-worker/constants';
+import { WorkerClientBus } from '../WorkerEventBus';
+import { DecryptionQueue } from '../DecryptionQueue';
+
+vi.mock('../WorkerEventBus', () => {
+  class MyWorkerClientBus {
+    request() {
+      throw new Error('request not mocked');
+    }
+  }
+
+  return { WorkerClientBus: MyWorkerClientBus };
+});
+
+test('should be able to forward request to worker client bus', async () => {
+  // This class is mocked
+  const bus = new WorkerClientBus<DECRYPTION_WORKER_ACTION_NAME>(null as never);
+  vi.spyOn(bus, 'request').mockImplementation(
+    async (actionName: DECRYPTION_WORKER_ACTION_NAME, payload: unknown): Promise<unknown> => {
+      return { actionName, payload };
+    }
+  );
+
+  const queue = new DecryptionQueue(bus, 1);
+  await expect(queue.add({ id: 'file://1', blobURI: 'blob://mock-file' })).resolves.toEqual({
+    actionName: DECRYPTION_WORKER_ACTION_NAME.DECRYPT,
+    payload: 'blob://mock-file',
+  });
+});