{"version":3,"sources":["../../../../src/interceptors/WebSocket/utils/bindEvent.ts","../../../../src/interceptors/WebSocket/utils/events.ts","../../../../src/interceptors/WebSocket/WebSocketClientConnection.ts","../../../../src/interceptors/WebSocket/WebSocketServerConnection.ts","../../../../src/interceptors/WebSocket/WebSocketOverride.ts","../../../../src/interceptors/WebSocket/WebSocketClassTransport.ts","../../../../src/interceptors/WebSocket/index.ts"],"sourcesContent":["type EventWithTarget = E & { target: T }\n\nexport function bindEvent(\n target: T,\n event: E\n): EventWithTarget {\n Object.defineProperties(event, {\n target: {\n value: target,\n enumerable: true,\n writable: true,\n },\n currentTarget: {\n value: target,\n enumerable: true,\n writable: true,\n },\n })\n\n return event as EventWithTarget\n}\n","const kCancelable = Symbol('kCancelable')\nconst kDefaultPrevented = Symbol('kDefaultPrevented')\n\n/**\n * A `MessageEvent` superset that supports event cancellation\n * in Node.js. It's rather non-intrusive so it can be safely\n * used in the browser as well.\n *\n * @see https://github.com/nodejs/node/issues/51767\n */\nexport class CancelableMessageEvent extends MessageEvent {\n [kCancelable]: boolean;\n [kDefaultPrevented]: boolean\n\n constructor(type: string, init: MessageEventInit) {\n super(type, init)\n this[kCancelable] = !!init.cancelable\n this[kDefaultPrevented] = false\n }\n\n get cancelable() {\n return this[kCancelable]\n }\n\n set cancelable(nextCancelable) {\n this[kCancelable] = nextCancelable\n }\n\n get defaultPrevented() {\n return this[kDefaultPrevented]\n }\n\n set defaultPrevented(nextDefaultPrevented) {\n this[kDefaultPrevented] = nextDefaultPrevented\n }\n\n public preventDefault(): void {\n if (this.cancelable && !this[kDefaultPrevented]) {\n this[kDefaultPrevented] = true\n }\n }\n}\n\ninterface CloseEventInit extends EventInit {\n code?: number\n reason?: string\n wasClean?: boolean\n}\n\nexport class CloseEvent extends Event {\n public code: number\n public reason: string\n public wasClean: boolean\n\n constructor(type: string, init: CloseEventInit = {}) {\n super(type, init)\n this.code = init.code === undefined ? 0 : init.code\n this.reason = init.reason === undefined ? '' : init.reason\n this.wasClean = init.wasClean === undefined ? false : init.wasClean\n }\n}\n\nexport class CancelableCloseEvent extends CloseEvent {\n [kCancelable]: boolean;\n [kDefaultPrevented]: boolean\n\n constructor(type: string, init: CloseEventInit = {}) {\n super(type, init)\n this[kCancelable] = !!init.cancelable\n this[kDefaultPrevented] = false\n }\n\n get cancelable() {\n return this[kCancelable]\n }\n\n set cancelable(nextCancelable) {\n this[kCancelable] = nextCancelable\n }\n\n get defaultPrevented() {\n return this[kDefaultPrevented]\n }\n\n set defaultPrevented(nextDefaultPrevented) {\n this[kDefaultPrevented] = nextDefaultPrevented\n }\n\n public preventDefault(): void {\n if (this.cancelable && !this[kDefaultPrevented]) {\n this[kDefaultPrevented] = true\n }\n }\n}\n","import type { WebSocketData, WebSocketTransport } from './WebSocketTransport'\nimport type { WebSocketEventListener } from './WebSocketOverride'\nimport { bindEvent } from './utils/bindEvent'\nimport { CancelableMessageEvent, CloseEvent } from './utils/events'\nimport { createRequestId } from '../../createRequestId'\n\nconst kEmitter = Symbol('kEmitter')\nconst kBoundListener = Symbol('kBoundListener')\n\ninterface WebSocketClientEventMap {\n message: MessageEvent\n close: CloseEvent\n}\n\nexport interface WebSocketClientConnectionProtocol {\n id: string\n url: URL\n send(data: WebSocketData): void\n close(code?: number, reason?: string): void\n}\n\n/**\n * The WebSocket client instance represents an incoming\n * client connection. The user can control the connection,\n * send and receive events.\n */\nexport class WebSocketClientConnection\n implements WebSocketClientConnectionProtocol\n{\n public readonly id: string\n public readonly url: URL\n\n private [kEmitter]: EventTarget\n\n constructor(\n public readonly socket: WebSocket,\n private readonly transport: WebSocketTransport\n ) {\n this.id = createRequestId()\n this.url = new URL(socket.url)\n this[kEmitter] = new EventTarget()\n\n // Emit outgoing client data (\"ws.send()\") as \"message\"\n // events on the \"client\" connection.\n this.transport.addEventListener('outgoing', (event) => {\n const message = bindEvent(\n this.socket,\n new CancelableMessageEvent('message', {\n data: event.data,\n origin: event.origin,\n cancelable: true,\n })\n )\n\n this[kEmitter].dispatchEvent(message)\n\n // This is a bit silly but forward the cancellation state\n // of the \"client\" message event to the \"outgoing\" transport event.\n // This way, other agens (like \"server\" connection) can know\n // whether the client listener has pervented the default.\n if (message.defaultPrevented) {\n event.preventDefault()\n }\n })\n\n /**\n * Emit the \"close\" event on the \"client\" connection\n * whenever the underlying transport is closed.\n * @note \"client.close()\" does NOT dispatch the \"close\"\n * event on the WebSocket because it uses non-configurable\n * close status code. Thus, we listen to the transport\n * instead of the WebSocket's \"close\" event.\n */\n this.transport.addEventListener('close', (event) => {\n this[kEmitter].dispatchEvent(\n bindEvent(this.socket, new CloseEvent('close', event))\n )\n })\n }\n\n /**\n * Listen for the outgoing events from the connected WebSocket client.\n */\n public addEventListener(\n type: EventType,\n listener: WebSocketEventListener,\n options?: AddEventListenerOptions | boolean\n ): void {\n if (!Reflect.has(listener, kBoundListener)) {\n const boundListener = listener.bind(this.socket)\n\n // Store the bound listener on the original listener\n // so the exact bound function can be accessed in \"removeEventListener()\".\n Object.defineProperty(listener, kBoundListener, {\n value: boundListener,\n enumerable: false,\n configurable: false,\n })\n }\n\n this[kEmitter].addEventListener(\n type,\n Reflect.get(listener, kBoundListener) as EventListener,\n options\n )\n }\n\n /**\n * Removes the listener for the given event.\n */\n public removeEventListener(\n event: EventType,\n listener: WebSocketEventListener,\n options?: EventListenerOptions | boolean\n ): void {\n this[kEmitter].removeEventListener(\n event,\n Reflect.get(listener, kBoundListener) as EventListener,\n options\n )\n }\n\n /**\n * Send data to the connected client.\n */\n public send(data: WebSocketData): void {\n this.transport.send(data)\n }\n\n /**\n * Close the WebSocket connection.\n * @param {number} code A status code (see https://www.rfc-editor.org/rfc/rfc6455#section-7.4.1).\n * @param {string} reason A custom connection close reason.\n */\n public close(code?: number, reason?: string): void {\n this.transport.close(code, reason)\n }\n}\n","import { invariant } from 'outvariant'\nimport {\n kClose,\n WebSocketEventListener,\n WebSocketOverride,\n} from './WebSocketOverride'\nimport type { WebSocketData } from './WebSocketTransport'\nimport type { WebSocketClassTransport } from './WebSocketClassTransport'\nimport { bindEvent } from './utils/bindEvent'\nimport {\n CancelableMessageEvent,\n CancelableCloseEvent,\n CloseEvent,\n} from './utils/events'\n\nconst kEmitter = Symbol('kEmitter')\nconst kBoundListener = Symbol('kBoundListener')\nconst kSend = Symbol('kSend')\n\ninterface WebSocketServerEventMap {\n open: Event\n message: MessageEvent\n error: Event\n close: CloseEvent\n}\n\n/**\n * The WebSocket server instance represents the actual production\n * WebSocket server connection. It's idle by default but you can\n * establish it by calling `server.connect()`.\n */\nexport class WebSocketServerConnection {\n /**\n * A WebSocket instance connected to the original server.\n */\n private realWebSocket?: WebSocket\n private mockCloseController: AbortController\n private realCloseController: AbortController\n private [kEmitter]: EventTarget\n\n constructor(\n private readonly client: WebSocketOverride,\n private readonly transport: WebSocketClassTransport,\n private readonly createConnection: () => WebSocket\n ) {\n this[kEmitter] = new EventTarget()\n this.mockCloseController = new AbortController()\n this.realCloseController = new AbortController()\n\n // Automatically forward outgoing client events\n // to the actual server unless the outgoing message event\n // has been prevented. The \"outgoing\" transport event it\n // dispatched by the \"client\" connection.\n this.transport.addEventListener('outgoing', (event) => {\n // Ignore client messages if the server connection\n // hasn't been established yet. Nowhere to forward.\n if (typeof this.realWebSocket === 'undefined') {\n return\n }\n\n // Every outgoing client message can prevent this forwarding\n // by preventing the default of the outgoing message event.\n // This listener will be added before user-defined listeners,\n // so execute the logic on the next tick.\n queueMicrotask(() => {\n if (!event.defaultPrevented) {\n /**\n * @note Use the internal send mechanism so consumers can tell\n * apart direct user calls to `server.send()` and internal calls.\n * E.g. MSW has to ignore this internal call to log out messages correctly.\n */\n this[kSend](event.data)\n }\n })\n })\n\n this.transport.addEventListener(\n 'incoming',\n this.handleIncomingMessage.bind(this)\n )\n }\n\n /**\n * The `WebSocket` instance connected to the original server.\n * Accessing this before calling `server.connect()` will throw.\n */\n public get socket(): WebSocket {\n invariant(\n this.realWebSocket,\n 'Cannot access \"socket\" on the original WebSocket server object: the connection is not open. Did you forget to call `server.connect()`?'\n )\n\n return this.realWebSocket\n }\n\n /**\n * Open connection to the original WebSocket server.\n */\n public connect(): void {\n invariant(\n !this.realWebSocket || this.realWebSocket.readyState !== WebSocket.OPEN,\n 'Failed to call \"connect()\" on the original WebSocket instance: the connection already open'\n )\n\n const realWebSocket = this.createConnection()\n\n // Inherit the binary type from the mock WebSocket client.\n realWebSocket.binaryType = this.client.binaryType\n\n // Allow the interceptor to listen to when the server connection\n // has been established. This isn't necessary to operate with the connection\n // but may be beneficial in some cases (like conditionally adding logging).\n realWebSocket.addEventListener(\n 'open',\n (event) => {\n this[kEmitter].dispatchEvent(\n bindEvent(this.realWebSocket!, new Event('open', event))\n )\n },\n { once: true }\n )\n\n realWebSocket.addEventListener('message', (event) => {\n // Dispatch the \"incoming\" transport event instead of\n // invoking the internal handler directly. This way,\n // anyone can listen to the \"incoming\" event but this\n // class is the one resulting in it.\n this.transport.dispatchEvent(\n bindEvent(\n this.realWebSocket!,\n new MessageEvent('incoming', {\n data: event.data,\n origin: event.origin,\n })\n )\n )\n })\n\n // Close the original connection when the mock client closes.\n // E.g. \"client.close()\" was called. This is never forwarded anywhere.\n this.client.addEventListener(\n 'close',\n (event) => {\n this.handleMockClose(event)\n },\n {\n signal: this.mockCloseController.signal,\n }\n )\n\n // Forward the \"close\" event to let the interceptor handle\n // closures initiated by the original server.\n realWebSocket.addEventListener(\n 'close',\n (event) => {\n this.handleRealClose(event)\n },\n {\n signal: this.realCloseController.signal,\n }\n )\n\n realWebSocket.addEventListener('error', () => {\n const errorEvent = bindEvent(\n realWebSocket,\n new Event('error', { cancelable: true })\n )\n\n // Emit the \"error\" event on the `server` connection\n // to let the interceptor react to original server errors.\n this[kEmitter].dispatchEvent(errorEvent)\n\n // If the error event from the original server hasn't been prevented,\n // forward it to the underlying client.\n if (!errorEvent.defaultPrevented) {\n this.client.dispatchEvent(bindEvent(this.client, new Event('error')))\n }\n })\n\n this.realWebSocket = realWebSocket\n }\n\n /**\n * Listen for the incoming events from the original WebSocket server.\n */\n public addEventListener(\n event: EventType,\n listener: WebSocketEventListener,\n options?: AddEventListenerOptions | boolean\n ): void {\n if (!Reflect.has(listener, kBoundListener)) {\n const boundListener = listener.bind(this.client)\n\n // Store the bound listener on the original listener\n // so the exact bound function can be accessed in \"removeEventListener()\".\n Object.defineProperty(listener, kBoundListener, {\n value: boundListener,\n enumerable: false,\n })\n }\n\n this[kEmitter].addEventListener(\n event,\n Reflect.get(listener, kBoundListener) as EventListener,\n options\n )\n }\n\n /**\n * Remove the listener for the given event.\n */\n public removeEventListener(\n event: EventType,\n listener: WebSocketEventListener,\n options?: EventListenerOptions | boolean\n ): void {\n this[kEmitter].removeEventListener(\n event,\n Reflect.get(listener, kBoundListener) as EventListener,\n options\n )\n }\n\n /**\n * Send data to the original WebSocket server.\n * @example\n * server.send('hello')\n * server.send(new Blob(['hello']))\n * server.send(new TextEncoder().encode('hello'))\n */\n public send(data: WebSocketData): void {\n this[kSend](data)\n }\n\n private [kSend](data: WebSocketData): void {\n const { realWebSocket } = this\n\n invariant(\n realWebSocket,\n 'Failed to call \"server.send()\" for \"%s\": the connection is not open. Did you forget to call \"server.connect()\"?',\n this.client.url\n )\n\n // Silently ignore writes on the closed original WebSocket.\n if (\n realWebSocket.readyState === WebSocket.CLOSING ||\n realWebSocket.readyState === WebSocket.CLOSED\n ) {\n return\n }\n\n // Delegate the send to when the original connection is open.\n // Unlike the mock, connecting to the original server may take time\n // so we cannot call this on the next tick.\n if (realWebSocket.readyState === WebSocket.CONNECTING) {\n realWebSocket.addEventListener(\n 'open',\n () => {\n realWebSocket.send(data)\n },\n { once: true }\n )\n return\n }\n\n // Send the data to the original WebSocket server.\n realWebSocket.send(data)\n }\n\n /**\n * Close the actual server connection.\n */\n public close(): void {\n const { realWebSocket } = this\n\n invariant(\n realWebSocket,\n 'Failed to close server connection for \"%s\": the connection is not open. Did you forget to call \"server.connect()\"?',\n this.client.url\n )\n\n // Remove the \"close\" event listener from the server\n // so it doesn't close the underlying WebSocket client\n // when you call \"server.close()\". This also prevents the\n // `close` event on the `server` connection from being dispatched twice.\n this.realCloseController.abort()\n\n if (\n realWebSocket.readyState === WebSocket.CLOSING ||\n realWebSocket.readyState === WebSocket.CLOSED\n ) {\n return\n }\n\n // Close the actual client connection.\n realWebSocket.close()\n\n // Dispatch the \"close\" event on the `server` connection.\n queueMicrotask(() => {\n this[kEmitter].dispatchEvent(\n bindEvent(\n this.realWebSocket,\n new CancelableCloseEvent('close', {\n /**\n * @note `server.close()` in the interceptor\n * always results in clean closures.\n */\n code: 1000,\n cancelable: true,\n })\n )\n )\n })\n }\n\n private handleIncomingMessage(event: MessageEvent): void {\n // Clone the event to dispatch it on this class\n // once again and prevent the \"already being dispatched\"\n // exception. Clone it here so we can observe this event\n // being prevented in the \"server.on()\" listeners.\n const messageEvent = bindEvent(\n event.target,\n new CancelableMessageEvent('message', {\n data: event.data,\n origin: event.origin,\n cancelable: true,\n })\n )\n\n /**\n * @note Emit \"message\" event on the server connection\n * instance to let the interceptor know about these\n * incoming events from the original server. In that listener,\n * the interceptor can modify or skip the event forwarding\n * to the mock WebSocket instance.\n */\n this[kEmitter].dispatchEvent(messageEvent)\n\n /**\n * @note Forward the incoming server events to the client.\n * Preventing the default on the message event stops this.\n */\n if (!messageEvent.defaultPrevented) {\n this.client.dispatchEvent(\n bindEvent(\n /**\n * @note Bind the forwarded original server events\n * to the mock WebSocket instance so it would\n * dispatch them straight away.\n */\n this.client,\n // Clone the message event again to prevent\n // the \"already being dispatched\" exception.\n new MessageEvent('message', {\n data: event.data,\n origin: event.origin,\n })\n )\n )\n }\n }\n\n private handleMockClose(_event: Event): void {\n // Close the original connection if the mock client closes.\n if (this.realWebSocket) {\n this.realWebSocket.close()\n }\n }\n\n private handleRealClose(event: CloseEvent): void {\n // For closures originating from the original server,\n // remove the \"close\" listener from the mock client.\n // original close -> (?) client[kClose]() --X--> \"close\" (again).\n this.mockCloseController.abort()\n\n const closeEvent = bindEvent(\n this.realWebSocket,\n new CancelableCloseEvent('close', {\n code: event.code,\n reason: event.reason,\n wasClean: event.wasClean,\n cancelable: true,\n })\n )\n\n this[kEmitter].dispatchEvent(closeEvent)\n\n // If the close event from the server hasn't been prevented,\n // forward the closure to the mock client.\n if (!closeEvent.defaultPrevented) {\n // Close the intercepted client forcefully to\n // allow non-configurable status codes from the server.\n // If the socket has been closed by now, no harm calling\n // this again—it will have no effect.\n this.client[kClose](event.code, event.reason)\n }\n }\n}\n","import { invariant } from 'outvariant'\nimport type { WebSocketData } from './WebSocketTransport'\nimport { bindEvent } from './utils/bindEvent'\nimport { CloseEvent } from './utils/events'\nimport { DeferredPromise } from '@open-draft/deferred-promise'\n\nexport type WebSocketEventListener<\n EventType extends WebSocketEventMap[keyof WebSocketEventMap] = Event\n> = (this: WebSocket, event: EventType) => void\n\nconst WEBSOCKET_CLOSE_CODE_RANGE_ERROR =\n 'InvalidAccessError: close code out of user configurable range'\n\nexport const kPassthroughPromise = Symbol('kPassthroughPromise')\nexport const kOnSend = Symbol('kOnSend')\nexport const kClose = Symbol('kClose')\n\nexport class WebSocketOverride extends EventTarget implements WebSocket {\n static readonly CONNECTING = 0\n static readonly OPEN = 1\n static readonly CLOSING = 2\n static readonly CLOSED = 3\n readonly CONNECTING = 0\n readonly OPEN = 1\n readonly CLOSING = 2\n readonly CLOSED = 3\n\n public url: string\n public protocol: string\n public extensions: string\n public binaryType: BinaryType\n public readyState: number\n public bufferedAmount: number\n\n private _onopen: WebSocketEventListener | null = null\n private _onmessage: WebSocketEventListener<\n MessageEvent\n > | null = null\n private _onerror: WebSocketEventListener | null = null\n private _onclose: WebSocketEventListener | null = null\n\n private [kPassthroughPromise]: DeferredPromise\n private [kOnSend]?: (data: WebSocketData) => void\n\n constructor(url: string | URL, protocols?: string | Array) {\n super()\n this.url = url.toString()\n this.protocol = ''\n this.extensions = ''\n this.binaryType = 'blob'\n this.readyState = this.CONNECTING\n this.bufferedAmount = 0\n\n this[kPassthroughPromise] = new DeferredPromise()\n\n queueMicrotask(async () => {\n if (await this[kPassthroughPromise]) {\n return\n }\n\n this.protocol =\n typeof protocols === 'string'\n ? protocols\n : Array.isArray(protocols) && protocols.length > 0\n ? protocols[0]\n : ''\n\n /**\n * @note Check that nothing has prevented this connection\n * (e.g. called `client.close()` in the connection listener).\n * If the connection has been prevented, never dispatch the open event,.\n */\n if (this.readyState === this.CONNECTING) {\n this.readyState = this.OPEN\n this.dispatchEvent(bindEvent(this, new Event('open')))\n }\n })\n }\n\n set onopen(listener: WebSocketEventListener | null) {\n this.removeEventListener('open', this._onopen)\n this._onopen = listener\n if (listener !== null) {\n this.addEventListener('open', listener)\n }\n }\n get onopen(): WebSocketEventListener | null {\n return this._onopen\n }\n\n set onmessage(\n listener: WebSocketEventListener> | null\n ) {\n this.removeEventListener(\n 'message',\n this._onmessage as WebSocketEventListener\n )\n this._onmessage = listener\n if (listener !== null) {\n this.addEventListener('message', listener)\n }\n }\n get onmessage(): WebSocketEventListener> | null {\n return this._onmessage\n }\n\n set onerror(listener: WebSocketEventListener | null) {\n this.removeEventListener('error', this._onerror)\n this._onerror = listener\n if (listener !== null) {\n this.addEventListener('error', listener)\n }\n }\n get onerror(): WebSocketEventListener | null {\n return this._onerror\n }\n\n set onclose(listener: WebSocketEventListener | null) {\n this.removeEventListener('close', this._onclose as WebSocketEventListener)\n this._onclose = listener\n if (listener !== null) {\n this.addEventListener('close', listener)\n }\n }\n get onclose(): WebSocketEventListener | null {\n return this._onclose\n }\n\n /**\n * @see https://websockets.spec.whatwg.org/#ref-for-dom-websocket-send%E2%91%A0\n */\n public send(data: WebSocketData): void {\n if (this.readyState === this.CONNECTING) {\n this.close()\n throw new DOMException('InvalidStateError')\n }\n\n // Sending when the socket is about to close\n // discards the sent data.\n if (this.readyState === this.CLOSING || this.readyState === this.CLOSED) {\n return\n }\n\n // Buffer the data to send in this even loop\n // but send it in the next.\n this.bufferedAmount += getDataSize(data)\n\n queueMicrotask(() => {\n // This is a bit optimistic but since no actual data transfer\n // is involved, all the data will be \"sent\" on the next tick.\n this.bufferedAmount = 0\n\n /**\n * @note Notify the parent about outgoing data.\n * This notifies the transport and the connection\n * listens to the outgoing data to emit the \"message\" event.\n */\n this[kOnSend]?.(data)\n })\n }\n\n public close(code: number = 1000, reason?: string): void {\n invariant(code, WEBSOCKET_CLOSE_CODE_RANGE_ERROR)\n invariant(\n code === 1000 || (code >= 3000 && code <= 4999),\n WEBSOCKET_CLOSE_CODE_RANGE_ERROR\n )\n\n this[kClose](code, reason)\n }\n\n private [kClose](\n code: number = 1000,\n reason?: string,\n wasClean = true\n ): void {\n /**\n * @note Move this check here so that even internall closures,\n * like those triggered by the `server` connection, are not\n * performed twice.\n */\n if (this.readyState === this.CLOSING || this.readyState === this.CLOSED) {\n return\n }\n\n this.readyState = this.CLOSING\n\n queueMicrotask(() => {\n this.readyState = this.CLOSED\n\n this.dispatchEvent(\n bindEvent(\n this,\n new CloseEvent('close', {\n code,\n reason,\n wasClean,\n })\n )\n )\n\n // Remove all event listeners once the socket is closed.\n this._onopen = null\n this._onmessage = null\n this._onerror = null\n this._onclose = null\n })\n }\n\n public addEventListener(\n type: K,\n listener: (this: WebSocket, event: WebSocketEventMap[K]) => void,\n options?: boolean | AddEventListenerOptions\n ): void\n public addEventListener(\n type: string,\n listener: EventListenerOrEventListenerObject,\n options?: boolean | AddEventListenerOptions\n ): void\n public addEventListener(\n type: unknown,\n listener: unknown,\n options?: unknown\n ): void {\n return super.addEventListener(\n type as string,\n listener as EventListener,\n options as AddEventListenerOptions\n )\n }\n\n removeEventListener(\n type: K,\n callback: EventListenerOrEventListenerObject | null,\n options?: boolean | EventListenerOptions\n ): void {\n return super.removeEventListener(type, callback, options)\n }\n}\n\nfunction getDataSize(data: WebSocketData): number {\n if (typeof data === 'string') {\n return data.length\n }\n\n if (data instanceof Blob) {\n return data.size\n }\n\n return data.byteLength\n}\n","import { bindEvent } from './utils/bindEvent'\nimport {\n StrictEventListenerOrEventListenerObject,\n WebSocketData,\n WebSocketTransport,\n WebSocketTransportEventMap,\n} from './WebSocketTransport'\nimport { kOnSend, kClose, WebSocketOverride } from './WebSocketOverride'\nimport { CancelableMessageEvent, CloseEvent } from './utils/events'\n\n/**\n * Abstraction over the given mock `WebSocket` instance that allows\n * for controlling that instance (e.g. sending and receiving messages).\n */\nexport class WebSocketClassTransport\n extends EventTarget\n implements WebSocketTransport\n{\n constructor(protected readonly socket: WebSocketOverride) {\n super()\n\n // Emit the \"close\" event on the transport if the close\n // originates from the WebSocket client. E.g. the application\n // calls \"ws.close()\", not the interceptor.\n this.socket.addEventListener('close', (event) => {\n this.dispatchEvent(bindEvent(this.socket, new CloseEvent('close', event)))\n })\n\n /**\n * Emit the \"outgoing\" event on the transport\n * whenever the WebSocket client sends data (\"ws.send()\").\n */\n this.socket[kOnSend] = (data) => {\n this.dispatchEvent(\n bindEvent(\n this.socket,\n // Dispatch this as cancelable because \"client\" connection\n // re-creates this message event (cannot dispatch the same event).\n new CancelableMessageEvent('outgoing', {\n data,\n origin: this.socket.url,\n cancelable: true,\n })\n )\n )\n }\n }\n\n public addEventListener(\n type: EventType,\n callback: StrictEventListenerOrEventListenerObject<\n WebSocketTransportEventMap[EventType]\n > | null,\n options?: boolean | AddEventListenerOptions\n ): void {\n return super.addEventListener(type, callback as EventListener, options)\n }\n\n public dispatchEvent(\n event: WebSocketTransportEventMap[EventType]\n ): boolean {\n return super.dispatchEvent(event)\n }\n\n public send(data: WebSocketData): void {\n queueMicrotask(() => {\n if (\n this.socket.readyState === this.socket.CLOSING ||\n this.socket.readyState === this.socket.CLOSED\n ) {\n return\n }\n\n const dispatchEvent = () => {\n this.socket.dispatchEvent(\n bindEvent(\n /**\n * @note Setting this event's \"target\" to the\n * WebSocket override instance is important.\n * This way it can tell apart original incoming events\n * (must be forwarded to the transport) from the\n * mocked message events like the one below\n * (must be dispatched on the client instance).\n */\n this.socket,\n new MessageEvent('message', {\n data,\n origin: this.socket.url,\n })\n )\n )\n }\n\n if (this.socket.readyState === this.socket.CONNECTING) {\n this.socket.addEventListener(\n 'open',\n () => {\n dispatchEvent()\n },\n { once: true }\n )\n } else {\n dispatchEvent()\n }\n })\n }\n\n public close(code: number, reason?: string): void {\n /**\n * @note Call the internal close method directly\n * to allow closing the connection with the status codes\n * that are non-configurable by the user (> 1000 <= 1015).\n */\n this.socket[kClose](code, reason)\n }\n}\n","import { Interceptor } from '../../Interceptor'\nimport {\n type WebSocketClientConnectionProtocol,\n WebSocketClientConnection,\n} from './WebSocketClientConnection'\nimport { WebSocketServerConnection } from './WebSocketServerConnection'\nimport { WebSocketClassTransport } from './WebSocketClassTransport'\nimport {\n kClose,\n kPassthroughPromise,\n WebSocketOverride,\n} from './WebSocketOverride'\nimport { bindEvent } from './utils/bindEvent'\nimport { hasConfigurableGlobal } from '../../utils/hasConfigurableGlobal'\n\nexport { type WebSocketData, WebSocketTransport } from './WebSocketTransport'\nexport {\n WebSocketClientConnection,\n WebSocketClientConnectionProtocol,\n WebSocketServerConnection,\n}\n\nexport type WebSocketEventMap = {\n connection: [args: WebSocketConnectionData]\n}\n\nexport type WebSocketConnectionData = {\n /**\n * The incoming WebSocket client connection.\n */\n client: WebSocketClientConnection\n\n /**\n * The original WebSocket server connection.\n */\n server: WebSocketServerConnection\n\n /**\n * The connection information.\n */\n info: {\n /**\n * The protocols supported by the WebSocket client.\n */\n protocols: string | Array | undefined\n }\n}\n\n/**\n * Intercept the outgoing WebSocket connections created using\n * the global `WebSocket` class.\n */\nexport class WebSocketInterceptor extends Interceptor {\n static symbol = Symbol('websocket')\n\n constructor() {\n super(WebSocketInterceptor.symbol)\n }\n\n protected checkEnvironment(): boolean {\n return hasConfigurableGlobal('WebSocket')\n }\n\n protected setup(): void {\n const originalWebSocketDescriptor = Object.getOwnPropertyDescriptor(\n globalThis,\n 'WebSocket'\n )\n\n const WebSocketProxy = new Proxy(globalThis.WebSocket, {\n construct: (\n target,\n args: ConstructorParameters,\n newTarget\n ) => {\n const [url, protocols] = args\n\n const createConnection = (): WebSocket => {\n return Reflect.construct(target, args, newTarget)\n }\n\n // All WebSocket instances are mocked and don't forward\n // any events to the original server (no connection established).\n // To forward the events, the user must use the \"server.send()\" API.\n const socket = new WebSocketOverride(url, protocols)\n const transport = new WebSocketClassTransport(socket)\n\n // Emit the \"connection\" event to the interceptor on the next tick\n // so the client can modify WebSocket options, like \"binaryType\"\n // while the connection is already pending.\n queueMicrotask(() => {\n try {\n const server = new WebSocketServerConnection(\n socket,\n transport,\n createConnection\n )\n\n // The \"globalThis.WebSocket\" class stands for\n // the client-side connection. Assume it's established\n // as soon as the WebSocket instance is constructed.\n const hasConnectionListeners = this.emitter.emit('connection', {\n client: new WebSocketClientConnection(socket, transport),\n server,\n info: {\n protocols,\n },\n })\n\n if (hasConnectionListeners) {\n socket[kPassthroughPromise].resolve(false)\n } else {\n socket[kPassthroughPromise].resolve(true)\n\n server.connect()\n\n // Forward the \"open\" event from the original server\n // to the mock WebSocket client in the case of a passthrough connection.\n server.addEventListener('open', () => {\n socket.dispatchEvent(bindEvent(socket, new Event('open')))\n\n // Forward the original connection protocol to the\n // mock WebSocket client.\n if (server['realWebSocket']) {\n socket.protocol = server['realWebSocket'].protocol\n }\n })\n }\n } catch (error) {\n /**\n * @note Translate unhandled exceptions during the connection\n * handling (i.e. interceptor exceptions) as WebSocket connection\n * closures with error. 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