Add rudimentary test

Author: afshin

packages/polling/package.json

@@ -61,7 +61,8 @@
     "rollup-plugin-sourcemaps": "^0.6.3",
     "terser": "^5.18.1",
     "tslib": "^2.5.3",
-    "typescript": "~5.1.3"
+    "typescript": "~5.1.3",
+    "ws": "^8.18.2"
   },
   "publishConfig": {
     "access": "public"

packages/polling/src/index.ts

@@ -13,6 +13,8 @@ export { Poll } from './poll';
 
 export { Debouncer, RateLimiter, Throttler } from './ratelimiter';
 
+export { SocketStream } from './socketstream';
+
 /**
  * A readonly poll that calls an asynchronous function with each tick.
  *

packages/polling/tests/src/socketstream.spec.ts

@@ -0,0 +1,24 @@
+// Copyright (c) Jupyter Development Team.
+// Distributed under the terms of the Modified BSD License.
+
+import { expect } from 'chai';
+
+import WebSocket from 'ws';
+
+import { SocketStream } from '@lumino/polling';
+
+describe('SocketStream', () => {
+  let stream: SocketStream<unknown, unknown>;
+
+  afterEach(() => {
+    stream.dispose();
+  });
+
+  describe('#constructor()', () => {
+    it('should create a socket stream', () => {
+      const url = 'https://www.example.com/';
+      stream = new SocketStream(null, () => new WebSocket(url) as any);
+      expect(stream).to.be.an.instanceof(SocketStream);
+    });
+  });
+});

yarn.lock

@@ -718,6 +718,7 @@ __metadata:
     terser: ^5.18.1
     tslib: ^2.5.3
     typescript: ~5.1.3
+    ws: ^8.18.2
   languageName: unknown
   linkType: soft
 
@@ -12600,6 +12601,21 @@ __metadata:
   languageName: node
   linkType: hard
 
+"ws@npm:^8.18.2":
+  version: 8.18.2
+  resolution: "ws@npm:8.18.2"
+  peerDependencies:
+    bufferutil: ^4.0.1
+    utf-8-validate: ">=5.0.2"
+  peerDependenciesMeta:
+    bufferutil:
+      optional: true
+    utf-8-validate:
+      optional: true
+  checksum: e38beae19ba4d68577ec24eb34fbfab376333fedd10f99b07511a8e842e22dbc102de39adac333a18e4c58868d0703cd5f239b04b345e22402d0ed8c34ea0aa0
+  languageName: node
+  linkType: hard
+
 "xtend@npm:~4.0.1":
   version: 4.0.2
   resolution: "xtend@npm:4.0.2"