`injectWS` throws on node >= 20

[MoLow]

Prerequisites

• [X] I have written a descriptive issue title
• [X] I have searched existing issues to ensure the bug has not already been reported

Fastify version

4.27.0

Plugin version

No response

Node.js version

20.x, 22.x

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

13

Description

I am running this simple code using injectWs:

const fastify = require("fastify")();
const message = "hi from client";
let _resolve;
const promise = new Promise((resolve) => {
  _resolve = resolve;
});

fastify.register(require("@fastify/websocket"));
fastify.register(async function (instance) {
  instance.get("/ws", { websocket: true }, function (conn) {
    conn.once("message", (chunk) => {
      _resolve(chunk.toString());
    });
  });
});

fastify.ready().then(async () => {
  const ws = await fastify.injectWS("/ws");
  ws.send(message);
  console.log(await promise);
  ws.terminate();
});

code runs ok on node 18 & 19 and fails on node > 20 (including node 22, and node main branch):

/Users/moshe/repos/whatslly/apps/messaging-websocket-consumer/node_modules/stream-shift/index.js:16
    return state.buffer[0].length
                           ^

TypeError: Cannot read properties of null (reading 'length')
    at getStateLength (/Users/moshe/repos/whatslly/apps/messaging-websocket-consumer/node_modules/stream-shift/index.js:16:28)
    at shift (/Users/moshe/repos/whatslly/apps/messaging-websocket-consumer/node_modules/stream-shift/index.js:6:99)
    at Duplexify._forward (/Users/moshe/repos/whatslly/apps/messaging-websocket-consumer/node_modules/duplexify/index.js:170:35)
    at PassThrough.onreadable (/Users/moshe/repos/whatslly/apps/messaging-websocket-consumer/node_modules/duplexify/index.js:136:10)
    at PassThrough.emit (node:events:520:28)
    at emitReadable_ (node:internal/streams/readable:832:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:81:21)

Link to code that reproduces the bug

No response

Expected Behavior

No response

[climba03003]

Can you run npm update stream-shift and test again? From your reported error, it shows you are using the outdated package.

[MoLow]

thanks, that fixed my issue