Example code playwright : wait for the request to finish

playwright.spec.ts

test(`check websocket available`, async({}) => {

    await new Promise<void>(done => {

    const ws = new WebSocket(`${endpoint.WEBSOCKET_HOST}/example/check`,{
        headers: {
          Cookie: `token=${accessToken}`
        }
    });
       ws.on('open',  function open(){
        ws.send("say something")
        ws.terminate()
        done()
        })
    })
})