[API reference](https://evolu.dev/docs/api-reference) › [@evolu/nodejs](https://evolu.dev/docs/api-reference/nodejs) › testSendWebSocketUpgradeRequest

```ts
function testSendWebSocketUpgradeRequest(
  port: number,
  path: string,
): Promise<IncomingMessage>;
```

Defined in: [packages/nodejs/src/WebSocket.ts:35](https://github.com/evoluhq/evolu/blob/59dabb7c56c68040b30d3919013adeb2b40bad10/packages/nodejs/src/WebSocket.ts#L35)

Sends a raw WebSocket upgrade request and resolves with the rejection
response.