test(companion): cover waitForAnyEvent socket-close rejection

src/companion/runtimeClient.test.ts

@@ -418,6 +418,44 @@ describe('CompanionRuntimeClient', () => {
     expect(client.connected).toBe(false);
   });
 
+  it('waitForAnyEvent rejects when websocket closes unexpectedly', async () => {
+    class FakeWebSocket extends EventEmitter {
+      readyState: number = WebSocket.CONNECTING;
+
+      constructor() {
+        super();
+        queueMicrotask(() => {
+          this.readyState = WebSocket.OPEN;
+          this.emit('open');
+        });
+      }
+
+      send(_payload: string, callback?: (error?: Error) => void): void {
+        callback?.();
+      }
+
+      close(_code?: number, _reason?: string): void {
+        this.readyState = WebSocket.CLOSED;
+        this.emit('close');
+      }
+    }
+
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+      websocketFactory: () => new FakeWebSocket() as unknown as WebSocket,
+    });
+    await client.connect();
+
+    const awaited = expect(
+      client.waitForAnyEvent(['agent.stream', 'agent.typing'], { timeoutMs: 10_000 }),
+    ).rejects.toThrow('WebSocket closed');
+
+    const ws = (client as unknown as { ws: WebSocket | null }).ws;
+    ws?.close();
+    await awaited;
+    expect(client.connected).toBe(false);
+  });
+
   it('waitForAgentStream resolves on agent.stream events', async () => {
     const client = new CompanionRuntimeClient({
       url: 'ws://127.0.0.1:1',