Initial curated chimera source from a8ae5b1db07fb49926c94585e2718e5130330974

test/server/websocket-backpressure.test.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const WebSocket = require('ws');
+const { broadcastToSockets } = require('../../src/server/app-server');
+
+test('broadcast closes slow websocket clients without blocking healthy clients', () => {
+  const sent = [];
+  const closed = [];
+  const healthy = { readyState: WebSocket.OPEN, bufferedAmount: 0, send: message => sent.push(message) };
+  const slow = { readyState: WebSocket.OPEN, bufferedAmount: 2048, send: () => assert.fail('slow client must not receive'), close: (code, reason) => closed.push({ code, reason }) };
+
+  const outcome = broadcastToSockets(new Set([healthy, slow]), '{"status":"ok"}', { maxBufferedBytes: 1024 });
+  assert.deepEqual(outcome, { sent: 1, closed: 1 });
+  assert.deepEqual(sent, ['{"status":"ok"}']);
+  assert.equal(closed[0].code, 1008);
+});