export class FakeWebSocket {

static CONNECTING = 0

static OPEN = 1

static CLOSING = 2

static CLOSED = 3

readyState = FakeWebSocket.CONNECTING

closed = false

sent: string[] = []

listeners = new Map<string, Set<(event: { data?: unknown }) => void>>()

constructor(

readonly url: string,

readonly options?: { headers?: Record<string, string> },

) {}

addEventListener(type: string, listener: (event: { data?: unknown }) => void) {

const current = this.listeners.get(type) ?? new Set<(event: { data?: unknown }) => void>()

current.add(listener)

this.listeners.set(type, current)

}

send(data: string) {

this.sent.push(data)

}

close() {

if (this.readyState === FakeWebSocket.CLOSED) return

this.closed = true

this.readyState = FakeWebSocket.CLOSED

this.emit("close", {})

}

open() {

this.readyState = FakeWebSocket.OPEN

this.emit("open", {})

}

message(data: unknown) {

this.emit("message", { data })

}

emit(type: string, event: { data?: unknown }) {

this.listeners.get(type)?.forEach((listener) => listener(event))

}

}