jest-worker - npm Package Compare versions

Comparing version 29.7.0 to 30.0.0-alpha.1

build/index.js

@@ -1,7 +0,1615 @@
-'use strict';
+/*!
+ * /**
+ *  * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *  *
+ *  * This source code is licensed under the MIT license found in the
+ *  * LICENSE file in the root directory of this source tree.
+ *  * /
+ */
+/******/ (() => { // webpackBootstrap
+/******/ 	"use strict";
+/******/ 	var __webpack_modules__ = ({
 
-Object.defineProperty(exports, '__esModule', {
+/***/ "./src/Farm.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
   value: true
+}));
+exports["default"] = void 0;
+var _FifoQueue = _interopRequireDefault(__webpack_require__("./src/FifoQueue.ts"));
+var _types = __webpack_require__("./src/types.ts");
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+class Farm {
+  _computeWorkerKey;
+  _workerSchedulingPolicy;
+  _cacheKeys = Object.create(null);
+  _locks = [];
+  _offset = 0;
+  _taskQueue;
+  constructor(_numOfWorkers, _callback, options = {}) {
+    this._numOfWorkers = _numOfWorkers;
+    this._callback = _callback;
+    this._computeWorkerKey = options.computeWorkerKey;
+    this._workerSchedulingPolicy = options.workerSchedulingPolicy ?? 'round-robin';
+    this._taskQueue = options.taskQueue ?? new _FifoQueue.default();
+  }
+  doWork(method, ...args) {
+    const customMessageListeners = new Set();
+    const addCustomMessageListener = listener => {
+      customMessageListeners.add(listener);
+      return () => {
+        customMessageListeners.delete(listener);
+      };
+    };
+    const onCustomMessage = message => {
+      for (const listener of customMessageListeners) listener(message);
+    };
+    const promise = new Promise(
+    // Bind args to this function so it won't reference to the parent scope.
+    // This prevents a memory leak in v8, because otherwise the function will
+    // retain args for the closure.
+    ((args, resolve, reject) => {
+      const computeWorkerKey = this._computeWorkerKey;
+      const request = [_types.CHILD_MESSAGE_CALL, false, method, args];
+      let worker = null;
+      let hash = null;
+      if (computeWorkerKey) {
+        hash = computeWorkerKey.call(this, method, ...args);
+        worker = hash == null ? null : this._cacheKeys[hash];
+      }
+      const onStart = worker => {
+        if (hash != null) {
+          this._cacheKeys[hash] = worker;
+        }
+      };
+      const onEnd = (error, result) => {
+        customMessageListeners.clear();
+        if (error) {
+          reject(error);
+        } else {
+          resolve(result);
+        }
+      };
+      const task = {
+        onCustomMessage,
+        onEnd,
+        onStart,
+        request
+      };
+      if (worker) {
+        this._taskQueue.enqueue(task, worker.getWorkerId());
+        this._process(worker.getWorkerId());
+      } else {
+        this._push(task);
+      }
+    }).bind(null, args));
+    promise.UNSTABLE_onCustomMessage = addCustomMessageListener;
+    return promise;
+  }
+  _process(workerId) {
+    if (this._isLocked(workerId)) {
+      return this;
+    }
+    const task = this._taskQueue.dequeue(workerId);
+    if (!task) {
+      return this;
+    }
+    if (task.request[1]) {
+      throw new Error('Queue implementation returned processed task');
+    }
+
+    // Reference the task object outside so it won't be retained by onEnd,
+    // and other properties of the task object, such as task.request can be
+    // garbage collected.
+    let taskOnEnd = task.onEnd;
+    const onEnd = (error, result) => {
+      if (taskOnEnd) {
+        taskOnEnd(error, result);
+      }
+      taskOnEnd = null;
+      this._unlock(workerId);
+      this._process(workerId);
+    };
+    task.request[1] = true;
+    this._lock(workerId);
+    this._callback(workerId, task.request, task.onStart, onEnd, task.onCustomMessage);
+    return this;
+  }
+  _push(task) {
+    this._taskQueue.enqueue(task);
+    const offset = this._getNextWorkerOffset();
+    for (let i = 0; i < this._numOfWorkers; i++) {
+      this._process((offset + i) % this._numOfWorkers);
+      if (task.request[1]) {
+        break;
+      }
+    }
+    return this;
+  }
+  _getNextWorkerOffset() {
+    switch (this._workerSchedulingPolicy) {
+      case 'in-order':
+        return 0;
+      case 'round-robin':
+        return this._offset++;
+    }
+  }
+  _lock(workerId) {
+    this._locks[workerId] = true;
+  }
+  _unlock(workerId) {
+    this._locks[workerId] = false;
+  }
+  _isLocked(workerId) {
+    return this._locks[workerId];
+  }
+}
+exports["default"] = Farm;
+
+/***/ }),
+
+/***/ "./src/FifoQueue.ts":
+/***/ ((__unused_webpack_module, exports) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports["default"] = void 0;
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * First-in, First-out task queue that manages a dedicated pool
+ * for each worker as well as a shared queue. The FIFO ordering is guaranteed
+ * across the worker specific and shared queue.
+ */
+class FifoQueue {
+  _workerQueues = [];
+  _sharedQueue = new InternalQueue();
+  enqueue(task, workerId) {
+    if (workerId == null) {
+      this._sharedQueue.enqueue(task);
+      return;
+    }
+    let workerQueue = this._workerQueues[workerId];
+    if (workerQueue == null) {
+      workerQueue = this._workerQueues[workerId] = new InternalQueue();
+    }
+    const sharedTop = this._sharedQueue.peekLast();
+    const item = {
+      previousSharedTask: sharedTop,
+      task
+    };
+    workerQueue.enqueue(item);
+  }
+  dequeue(workerId) {
+    const workerTop = this._workerQueues[workerId]?.peek();
+    const sharedTaskIsProcessed = workerTop?.previousSharedTask?.request[1] ?? true;
+
+    // Process the top task from the shared queue if
+    // - there's no task in the worker specific queue or
+    // - if the non-worker-specific task after which this worker specific task
+    //   has been queued wasn't processed yet
+    if (workerTop != null && sharedTaskIsProcessed) {
+      return this._workerQueues[workerId]?.dequeue()?.task ?? null;
+    }
+    return this._sharedQueue.dequeue();
+  }
+}
+exports["default"] = FifoQueue;
+/**
+ * FIFO queue for a single worker / shared queue.
+ */
+class InternalQueue {
+  _head = null;
+  _last = null;
+  enqueue(value) {
+    const item = {
+      next: null,
+      value
+    };
+    if (this._last == null) {
+      this._head = item;
+    } else {
+      this._last.next = item;
+    }
+    this._last = item;
+  }
+  dequeue() {
+    if (this._head == null) {
+      return null;
+    }
+    const item = this._head;
+    this._head = item.next;
+    if (this._head == null) {
+      this._last = null;
+    }
+    return item.value;
+  }
+  peek() {
+    return this._head?.value ?? null;
+  }
+  peekLast() {
+    return this._last?.value ?? null;
+  }
+}
+
+/***/ }),
+
+/***/ "./src/PriorityQueue.ts":
+/***/ ((__unused_webpack_module, exports) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports["default"] = void 0;
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * Priority queue that processes tasks in natural ordering (lower priority first)
+ * according to the priority computed by the function passed in the constructor.
+ *
+ * FIFO ordering isn't guaranteed for tasks with the same priority.
+ *
+ * Worker specific tasks with the same priority as a non-worker specific task
+ * are always processed first.
+ */
+class PriorityQueue {
+  _queue = [];
+  _sharedQueue = new MinHeap();
+  constructor(_computePriority) {
+    this._computePriority = _computePriority;
+  }
+  enqueue(task, workerId) {
+    if (workerId == null) {
+      this._enqueue(task, this._sharedQueue);
+    } else {
+      const queue = this._getWorkerQueue(workerId);
+      this._enqueue(task, queue);
+    }
+  }
+  _enqueue(task, queue) {
+    const item = {
+      priority: this._computePriority(task.request[2], ...task.request[3]),
+      task
+    };
+    queue.add(item);
+  }
+  dequeue(workerId) {
+    const workerQueue = this._getWorkerQueue(workerId);
+    const workerTop = workerQueue.peek();
+    const sharedTop = this._sharedQueue.peek();
+
+    // use the task from the worker queue if there's no task in the shared queue
+    // or if the priority of the worker queue is smaller or equal to the
+    // priority of the top task in the shared queue. The tasks of the
+    // worker specific queue are preferred because no other worker can pick this
+    // specific task up.
+    if (sharedTop == null || workerTop != null && workerTop.priority <= sharedTop.priority) {
+      return workerQueue.poll()?.task ?? null;
+    }
+    return this._sharedQueue.poll().task;
+  }
+  _getWorkerQueue(workerId) {
+    let queue = this._queue[workerId];
+    if (queue == null) {
+      queue = this._queue[workerId] = new MinHeap();
+    }
+    return queue;
+  }
+}
+exports["default"] = PriorityQueue;
+class MinHeap {
+  _heap = [];
+  peek() {
+    return this._heap[0] ?? null;
+  }
+  add(item) {
+    const nodes = this._heap;
+    nodes.push(item);
+    if (nodes.length === 1) {
+      return;
+    }
+    let currentIndex = nodes.length - 1;
+
+    // Bubble up the added node as long as the parent is bigger
+    while (currentIndex > 0) {
+      const parentIndex = Math.floor((currentIndex + 1) / 2) - 1;
+      const parent = nodes[parentIndex];
+      if (parent.priority <= item.priority) {
+        break;
+      }
+      nodes[currentIndex] = parent;
+      nodes[parentIndex] = item;
+      currentIndex = parentIndex;
+    }
+  }
+  poll() {
+    const nodes = this._heap;
+    const result = nodes[0];
+    const lastElement = nodes.pop();
+
+    // heap was empty or removed the last element
+    if (result == null || nodes.length === 0) {
+      return result ?? null;
+    }
+    let index = 0;
+    nodes[0] = lastElement ?? null;
+    const element = nodes[0];
+    while (true) {
+      let swapIndex = null;
+      const rightChildIndex = (index + 1) * 2;
+      const leftChildIndex = rightChildIndex - 1;
+      const rightChild = nodes[rightChildIndex];
+      const leftChild = nodes[leftChildIndex];
+
+      // if the left child is smaller, swap with the left
+      if (leftChild != null && leftChild.priority < element.priority) {
+        swapIndex = leftChildIndex;
+      }
+
+      // If the right child is smaller or the right child is smaller than the left
+      // then swap with the right child
+      if (rightChild != null && rightChild.priority < (swapIndex == null ? element : leftChild).priority) {
+        swapIndex = rightChildIndex;
+      }
+      if (swapIndex == null) {
+        break;
+      }
+      nodes[index] = nodes[swapIndex];
+      nodes[swapIndex] = element;
+      index = swapIndex;
+    }
+    return result;
+  }
+}
+
+/***/ }),
+
+/***/ "./src/WorkerPool.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports["default"] = void 0;
+var _BaseWorkerPool = _interopRequireDefault(__webpack_require__("./src/base/BaseWorkerPool.ts"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+class WorkerPool extends _BaseWorkerPool.default {
+  send(workerId, request, onStart, onEnd, onCustomMessage) {
+    this.restartWorkerIfShutDown(workerId);
+    this.getWorkerById(workerId).send(request, onStart, onEnd, onCustomMessage);
+  }
+  createWorker(workerOptions) {
+    let Worker;
+    if (this._options.enableWorkerThreads) {
+      Worker = (__webpack_require__("./src/workers/NodeThreadsWorker.ts")/* ["default"] */ .Z);
+    } else {
+      Worker = (__webpack_require__("./src/workers/ChildProcessWorker.ts")/* ["default"] */ .ZP);
+    }
+    return new Worker(workerOptions);
+  }
+}
+var _default = exports["default"] = WorkerPool;
+
+/***/ }),
+
+/***/ "./src/base/BaseWorkerPool.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports["default"] = void 0;
+function _mergeStream() {
+  const data = _interopRequireDefault(require("merge-stream"));
+  _mergeStream = function () {
+    return data;
+  };
+  return data;
+}
+var _types = __webpack_require__("./src/types.ts");
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+// How long to wait for the child process to terminate
+// after CHILD_MESSAGE_END before sending force exiting.
+const FORCE_EXIT_DELAY = 500;
+
+/* istanbul ignore next */
+// eslint-disable-next-line @typescript-eslint/no-empty-function
+const emptyMethod = () => {};
+class BaseWorkerPool {
+  _stderr;
+  _stdout;
+  _options;
+  _workers;
+  _workerPath;
+  constructor(workerPath, options) {
+    this._options = options;
+    this._workerPath = workerPath;
+    this._workers = new Array(options.numWorkers);
+    const stdout = (0, _mergeStream().default)();
+    const stderr = (0, _mergeStream().default)();
+    const {
+      forkOptions,
+      maxRetries,
+      resourceLimits,
+      setupArgs
+    } = options;
+    for (let i = 0; i < options.numWorkers; i++) {
+      const workerOptions = {
+        forkOptions,
+        idleMemoryLimit: this._options.idleMemoryLimit,
+        maxRetries,
+        resourceLimits,
+        setupArgs,
+        workerId: i,
+        workerPath
+      };
+      const worker = this.createWorker(workerOptions);
+      const workerStdout = worker.getStdout();
+      const workerStderr = worker.getStderr();
+      if (workerStdout) {
+        stdout.add(workerStdout);
+      }
+      if (workerStderr) {
+        stderr.add(workerStderr);
+      }
+      this._workers[i] = worker;
+    }
+    this._stdout = stdout;
+    this._stderr = stderr;
+  }
+  getStderr() {
+    return this._stderr;
+  }
+  getStdout() {
+    return this._stdout;
+  }
+  getWorkers() {
+    return this._workers;
+  }
+  getWorkerById(workerId) {
+    return this._workers[workerId];
+  }
+  restartWorkerIfShutDown(workerId) {
+    if (this._workers[workerId].state === _types.WorkerStates.SHUT_DOWN) {
+      const {
+        forkOptions,
+        maxRetries,
+        resourceLimits,
+        setupArgs
+      } = this._options;
+      const workerOptions = {
+        forkOptions,
+        idleMemoryLimit: this._options.idleMemoryLimit,
+        maxRetries,
+        resourceLimits,
+        setupArgs,
+        workerId,
+        workerPath: this._workerPath
+      };
+      const worker = this.createWorker(workerOptions);
+      this._workers[workerId] = worker;
+    }
+  }
+  createWorker(_workerOptions) {
+    throw Error('Missing method createWorker in WorkerPool');
+  }
+  async start() {
+    await Promise.all(this._workers.map(async worker => {
+      await worker.waitForWorkerReady();
+      await new Promise((resolve, reject) => {
+        worker.send([_types.CHILD_MESSAGE_CALL_SETUP], emptyMethod, error => {
+          if (error) {
+            reject(error);
+          } else {
+            resolve();
+          }
+        }, emptyMethod);
+      });
+    }));
+  }
+  async end() {
+    // We do not cache the request object here. If so, it would only be only
+    // processed by one of the workers, and we want them all to close.
+    const workerExitPromises = this._workers.map(async worker => {
+      worker.send([_types.CHILD_MESSAGE_END, false], emptyMethod, emptyMethod, emptyMethod);
+
+      // Schedule a force exit in case worker fails to exit gracefully so
+      // await worker.waitForExit() never takes longer than FORCE_EXIT_DELAY
+      let forceExited = false;
+      const forceExitTimeout = setTimeout(() => {
+        worker.forceExit();
+        forceExited = true;
+      }, FORCE_EXIT_DELAY);
+      await worker.waitForExit();
+      // Worker ideally exited gracefully, don't send force exit then
+      clearTimeout(forceExitTimeout);
+      return forceExited;
+    });
+    const workerExits = await Promise.all(workerExitPromises);
+    return workerExits.reduce((result, forceExited) => ({
+      forceExited: result.forceExited || forceExited
+    }), {
+      forceExited: false
+    });
+  }
+}
+exports["default"] = BaseWorkerPool;
+
+/***/ }),
+
+/***/ "./src/types.ts":
+/***/ ((__unused_webpack_module, exports) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports.WorkerStates = exports.WorkerEvents = exports.PARENT_MESSAGE_SETUP_ERROR = exports.PARENT_MESSAGE_OK = exports.PARENT_MESSAGE_MEM_USAGE = exports.PARENT_MESSAGE_CUSTOM = exports.PARENT_MESSAGE_CLIENT_ERROR = exports.CHILD_MESSAGE_MEM_USAGE = exports.CHILD_MESSAGE_INITIALIZE = exports.CHILD_MESSAGE_END = exports.CHILD_MESSAGE_CALL_SETUP = exports.CHILD_MESSAGE_CALL = void 0;
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+// Because of the dynamic nature of a worker communication process, all messages
+// coming from any of the other processes cannot be typed. Thus, many types
+// include "unknown" as a TS type, which is (unfortunately) correct here.
+
+const CHILD_MESSAGE_INITIALIZE = exports.CHILD_MESSAGE_INITIALIZE = 0;
+const CHILD_MESSAGE_CALL = exports.CHILD_MESSAGE_CALL = 1;
+const CHILD_MESSAGE_END = exports.CHILD_MESSAGE_END = 2;
+const CHILD_MESSAGE_MEM_USAGE = exports.CHILD_MESSAGE_MEM_USAGE = 3;
+const CHILD_MESSAGE_CALL_SETUP = exports.CHILD_MESSAGE_CALL_SETUP = 4;
+const PARENT_MESSAGE_OK = exports.PARENT_MESSAGE_OK = 0;
+const PARENT_MESSAGE_CLIENT_ERROR = exports.PARENT_MESSAGE_CLIENT_ERROR = 1;
+const PARENT_MESSAGE_SETUP_ERROR = exports.PARENT_MESSAGE_SETUP_ERROR = 2;
+const PARENT_MESSAGE_CUSTOM = exports.PARENT_MESSAGE_CUSTOM = 3;
+const PARENT_MESSAGE_MEM_USAGE = exports.PARENT_MESSAGE_MEM_USAGE = 4;
+
+// Option objects.
+
+// Messages passed from the parent to the children.
+
+// Messages passed from the children to the parent.
+
+// Queue types.
+let WorkerStates = exports.WorkerStates = /*#__PURE__*/function (WorkerStates) {
+  WorkerStates["STARTING"] = "starting";
+  WorkerStates["OK"] = "ok";
+  WorkerStates["OUT_OF_MEMORY"] = "oom";
+  WorkerStates["RESTARTING"] = "restarting";
+  WorkerStates["SHUTTING_DOWN"] = "shutting-down";
+  WorkerStates["SHUT_DOWN"] = "shut-down";
+  return WorkerStates;
+}({});
+let WorkerEvents = exports.WorkerEvents = /*#__PURE__*/function (WorkerEvents) {
+  WorkerEvents["STATE_CHANGE"] = "state-change";
+  return WorkerEvents;
+}({});
+
+/***/ }),
+
+/***/ "./src/workers/ChildProcessWorker.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+var __webpack_unused_export__;
+
+
+__webpack_unused_export__ = ({
+  value: true
 });
-Object.defineProperty(exports, 'FifoQueue', {
+exports.ZP = __webpack_unused_export__ = void 0;
+function _child_process() {
+  const data = require("child_process");
+  _child_process = function () {
+    return data;
+  };
+  return data;
+}
+function _os() {
+  const data = require("os");
+  _os = function () {
+    return data;
+  };
+  return data;
+}
+function _mergeStream() {
+  const data = _interopRequireDefault(require("merge-stream"));
+  _mergeStream = function () {
+    return data;
+  };
+  return data;
+}
+function _supportsColor() {
+  const data = require("supports-color");
+  _supportsColor = function () {
+    return data;
+  };
+  return data;
+}
+var _types = __webpack_require__("./src/types.ts");
+var _WorkerAbstract = _interopRequireDefault(__webpack_require__("./src/workers/WorkerAbstract.ts"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const SIGNAL_BASE_EXIT_CODE = 128;
+const SIGKILL_EXIT_CODE = SIGNAL_BASE_EXIT_CODE + 9;
+const SIGTERM_EXIT_CODE = SIGNAL_BASE_EXIT_CODE + 15;
+
+// How long to wait after SIGTERM before sending SIGKILL
+const SIGKILL_DELAY = __webpack_unused_export__ = 500;
+
+/**
+ * This class wraps the child process and provides a nice interface to
+ * communicate with. It takes care of:
+ *
+ *  - Re-spawning the process if it dies.
+ *  - Queues calls while the worker is busy.
+ *  - Re-sends the requests if the worker blew up.
+ *
+ * The reason for queueing them here (since childProcess.send also has an
+ * internal queue) is because the worker could be doing asynchronous work, and
+ * this would lead to the child process to read its receiving buffer and start a
+ * second call. By queueing calls here, we don't send the next call to the
+ * children until we receive the result of the previous one.
+ *
+ * As soon as a request starts to be processed by a worker, its "processed"
+ * field is changed to "true", so that other workers which might encounter the
+ * same call skip it.
+ */
+class ChildProcessWorker extends _WorkerAbstract.default {
+  _child;
+  _options;
+  _request;
+  _retries;
+  _onProcessEnd;
+  _onCustomMessage;
+  _stdout;
+  _stderr;
+  _stderrBuffer = [];
+  _memoryUsagePromise;
+  _resolveMemoryUsage;
+  _childIdleMemoryUsage;
+  _childIdleMemoryUsageLimit;
+  _memoryUsageCheck = false;
+  _childWorkerPath;
+  constructor(options) {
+    super(options);
+    this._options = options;
+    this._request = null;
+    this._stdout = null;
+    this._stderr = null;
+    this._childIdleMemoryUsage = null;
+    this._childIdleMemoryUsageLimit = options.idleMemoryLimit || null;
+    this._childWorkerPath = options.childWorkerPath || require.resolve('./processChild');
+    this.state = _types.WorkerStates.STARTING;
+    this.initialize();
+  }
+  initialize() {
+    if (this.state === _types.WorkerStates.OUT_OF_MEMORY || this.state === _types.WorkerStates.SHUTTING_DOWN || this.state === _types.WorkerStates.SHUT_DOWN) {
+      return;
+    }
+    if (this._child && this._child.connected) {
+      this._child.kill('SIGKILL');
+    }
+    this.state = _types.WorkerStates.STARTING;
+    const forceColor = _supportsColor().stdout ? {
+      FORCE_COLOR: '1'
+    } : {};
+    const silent = this._options.silent ?? true;
+    if (!silent) {
+      // NOTE: Detecting an out of memory crash is independent of idle memory usage monitoring. We want to
+      // monitor for a crash occurring so that it can be handled as required and so we can tell the difference
+      // between an OOM crash and another kind of crash. We need to do this because if a worker crashes due to
+      // an OOM event sometimes it isn't seen by the worker pool and it just sits there waiting for the worker
+      // to respond and it never will.
+      console.warn('Unable to detect out of memory event if silent === false');
+    }
+    this._stderrBuffer = [];
+    const options = {
+      cwd: process.cwd(),
+      env: {
+        ...process.env,
+        JEST_WORKER_ID: String(this._options.workerId + 1),
+        // 0-indexed workerId, 1-indexed JEST_WORKER_ID
+        ...forceColor
+      },
+      // Suppress --debug / --inspect flags while preserving others (like --harmony).
+      execArgv: process.execArgv.filter(v => !/^--(debug|inspect)/.test(v)),
+      // default to advanced serialization in order to match worker threads
+      serialization: 'advanced',
+      silent,
+      ...this._options.forkOptions
+    };
+    this._child = (0, _child_process().fork)(this._childWorkerPath, [], options);
+    if (this._child.stdout) {
+      if (!this._stdout) {
+        // We need to add a permanent stream to the merged stream to prevent it
+        // from ending when the subprocess stream ends
+        this._stdout = (0, _mergeStream().default)(this._getFakeStream());
+      }
+      this._stdout.add(this._child.stdout);
+    }
+    if (this._child.stderr) {
+      if (!this._stderr) {
+        // We need to add a permanent stream to the merged stream to prevent it
+        // from ending when the subprocess stream ends
+        this._stderr = (0, _mergeStream().default)(this._getFakeStream());
+      }
+      this._stderr.add(this._child.stderr);
+      this._child.stderr.on('data', this.stderrDataHandler.bind(this));
+    }
+    this._child.on('message', this._onMessage.bind(this));
+    this._child.on('exit', this._onExit.bind(this));
+    this._child.on('disconnect', this._onDisconnect.bind(this));
+    this._child.send([_types.CHILD_MESSAGE_INITIALIZE, false, this._options.workerPath, this._options.setupArgs]);
+    this._retries++;
+
+    // If we exceeded the amount of retries, we will emulate an error reply
+    // coming from the child. This avoids code duplication related with cleaning
+    // the queue, and scheduling the next call.
+    if (this._retries > this._options.maxRetries) {
+      const error = new Error(`Jest worker encountered ${this._retries} child process exceptions, exceeding retry limit`);
+      this._onMessage([_types.PARENT_MESSAGE_CLIENT_ERROR, error.name, error.message, error.stack, {
+        type: 'WorkerError'
+      }]);
+
+      // Clear the request so we don't keep executing it.
+      this._request = null;
+    }
+    this.state = _types.WorkerStates.OK;
+    if (this._resolveWorkerReady) {
+      this._resolveWorkerReady();
+    }
+  }
+  stderrDataHandler(chunk) {
+    if (chunk) {
+      this._stderrBuffer.push(Buffer.from(chunk));
+    }
+    this._detectOutOfMemoryCrash();
+    if (this.state === _types.WorkerStates.OUT_OF_MEMORY) {
+      this._workerReadyPromise = undefined;
+      this._resolveWorkerReady = undefined;
+      this.killChild();
+      this._shutdown();
+    }
+  }
+  _detectOutOfMemoryCrash() {
+    try {
+      const bufferStr = Buffer.concat(this._stderrBuffer).toString('utf8');
+      if (bufferStr.includes('heap out of memory') || bufferStr.includes('allocation failure;') || bufferStr.includes('Last few GCs')) {
+        if (this.state === _types.WorkerStates.OK || this.state === _types.WorkerStates.STARTING) {
+          this.state = _types.WorkerStates.OUT_OF_MEMORY;
+        }
+      }
+    } catch (err) {
+      console.error('Error looking for out of memory crash', err);
+    }
+  }
+  _onDisconnect() {
+    this._workerReadyPromise = undefined;
+    this._resolveWorkerReady = undefined;
+    this._detectOutOfMemoryCrash();
+    if (this.state === _types.WorkerStates.OUT_OF_MEMORY) {
+      this.killChild();
+      this._shutdown();
+    }
+  }
+  _onMessage(response) {
+    // Ignore messages not intended for us
+    if (!Array.isArray(response)) return;
+
+    // TODO: Add appropriate type check
+    let error;
+    switch (response[0]) {
+      case _types.PARENT_MESSAGE_OK:
+        this._onProcessEnd(null, response[1]);
+        break;
+      case _types.PARENT_MESSAGE_CLIENT_ERROR:
+        error = response[4];
+        if (error != null && typeof error === 'object') {
+          const extra = error;
+          // @ts-expect-error: no index
+          const NativeCtor = globalThis[response[1]];
+          const Ctor = typeof NativeCtor === 'function' ? NativeCtor : Error;
+          error = new Ctor(response[2]);
+          error.type = response[1];
+          error.stack = response[3];
+          for (const key in extra) {
+            error[key] = extra[key];
+          }
+        }
+        this._onProcessEnd(error, null);
+        break;
+      case _types.PARENT_MESSAGE_SETUP_ERROR:
+        error = new Error(`Error when calling setup: ${response[2]}`);
+        error.type = response[1];
+        error.stack = response[3];
+        this._onProcessEnd(error, null);
+        break;
+      case _types.PARENT_MESSAGE_CUSTOM:
+        this._onCustomMessage(response[1]);
+        break;
+      case _types.PARENT_MESSAGE_MEM_USAGE:
+        this._childIdleMemoryUsage = response[1];
+        if (this._resolveMemoryUsage) {
+          this._resolveMemoryUsage(response[1]);
+          this._resolveMemoryUsage = undefined;
+          this._memoryUsagePromise = undefined;
+        }
+        this._performRestartIfRequired();
+        break;
+      default:
+        // Ignore messages not intended for us
+        break;
+    }
+  }
+  _performRestartIfRequired() {
+    if (this._memoryUsageCheck) {
+      this._memoryUsageCheck = false;
+      let limit = this._childIdleMemoryUsageLimit;
+
+      // TODO: At some point it would make sense to make use of
+      // stringToBytes found in jest-config, however as this
+      // package does not have any dependencies on an other jest
+      // packages that can wait until some other time.
+      if (limit && limit > 0 && limit <= 1) {
+        limit = Math.floor((0, _os().totalmem)() * limit);
+      } else if (limit) {
+        limit = Math.floor(limit);
+      }
+      if (limit && this._childIdleMemoryUsage && this._childIdleMemoryUsage > limit) {
+        this.state = _types.WorkerStates.RESTARTING;
+        this.killChild();
+      }
+    }
+  }
+  _onExit(exitCode, signal) {
+    this._workerReadyPromise = undefined;
+    this._resolveWorkerReady = undefined;
+    this._detectOutOfMemoryCrash();
+    if (exitCode !== 0 && this.state === _types.WorkerStates.OUT_OF_MEMORY) {
+      this._onProcessEnd(new Error('Jest worker ran out of memory and crashed'), null);
+      this._shutdown();
+    } else if (exitCode !== 0 && exitCode !== null && exitCode !== SIGTERM_EXIT_CODE && exitCode !== SIGKILL_EXIT_CODE && this.state !== _types.WorkerStates.SHUTTING_DOWN || this.state === _types.WorkerStates.RESTARTING) {
+      this.state = _types.WorkerStates.RESTARTING;
+      this.initialize();
+      if (this._request) {
+        this._child.send(this._request);
+      }
+    } else {
+      // At this point, it's not clear why the child process exited. There could
+      // be several reasons:
+      //
+      //  1. The child process exited successfully after finishing its work.
+      //     This is the most likely case.
+      //  2. The child process crashed in a manner that wasn't caught through
+      //     any of the heuristic-based checks above.
+      //  3. The child process was killed by another process or daemon unrelated
+      //     to Jest. For example, oom-killer on Linux may have picked the child
+      //     process to kill because overall system memory is constrained.
+      //
+      // If there's a pending request to the child process in any of those
+      // situations, the request still needs to be handled in some manner before
+      // entering the shutdown phase. Otherwise the caller expecting a response
+      // from the worker will never receive indication that something unexpected
+      // happened and hang forever.
+      //
+      // In normal operation, the request is handled and cleared before the
+      // child process exits. If it's still present, it's not clear what
+      // happened and probably best to throw an error. In practice, this usually
+      // happens when the child process is killed externally.
+      //
+      // There's a reasonable argument that the child process should be retried
+      // with request re-sent in this scenario. However, if the problem was due
+      // to situations such as oom-killer attempting to free up system
+      // resources, retrying would exacerbate the problem.
+      const isRequestStillPending = !!this._request;
+      if (isRequestStillPending) {
+        // If a signal is present, we can be reasonably confident the process
+        // was killed externally. Log this fact so it's more clear to users that
+        // something went wrong externally, rather than a bug in Jest itself.
+        const error = new Error(signal == null ? `A jest worker process (pid=${this._child.pid}) crashed for an unknown reason: exitCode=${exitCode}` : `A jest worker process (pid=${this._child.pid}) was terminated by another process: signal=${signal}, exitCode=${exitCode}. Operating system logs may contain more information on why this occurred.`);
+        this._onProcessEnd(error, null);
+      }
+      this._shutdown();
+    }
+  }
+  send(request, onProcessStart, onProcessEnd, onCustomMessage) {
+    this._stderrBuffer = [];
+    onProcessStart(this);
+    this._onProcessEnd = (...args) => {
+      const hasRequest = !!this._request;
+
+      // Clean the request to avoid sending past requests to workers that fail
+      // while waiting for a new request (timers, unhandled rejections...)
+      this._request = null;
+      if (this._childIdleMemoryUsageLimit && this._child.connected && hasRequest) {
+        this.checkMemoryUsage();
+      }
+      return onProcessEnd(...args);
+    };
+    this._onCustomMessage = (...arg) => onCustomMessage(...arg);
+    this._request = request;
+    this._retries = 0;
+    // eslint-disable-next-line @typescript-eslint/no-empty-function
+    this._child.send(request, () => {});
+  }
+  waitForExit() {
+    return this._exitPromise;
+  }
+  killChild() {
+    // We store a reference so that there's no way we can accidentally
+    // kill a new worker that has been spawned.
+    const childToKill = this._child;
+    childToKill.kill('SIGTERM');
+    return setTimeout(() => childToKill.kill('SIGKILL'), SIGKILL_DELAY);
+  }
+  forceExit() {
+    this.state = _types.WorkerStates.SHUTTING_DOWN;
+    const sigkillTimeout = this.killChild();
+    this._exitPromise.then(() => clearTimeout(sigkillTimeout));
+  }
+  getWorkerId() {
+    return this._options.workerId;
+  }
+
+  /**
+   * Gets the process id of the worker.
+   *
+   * @returns Process id.
+   */
+  getWorkerSystemId() {
+    return this._child.pid;
+  }
+  getStdout() {
+    return this._stdout;
+  }
+  getStderr() {
+    return this._stderr;
+  }
+
+  /**
+   * Gets the last reported memory usage.
+   *
+   * @returns Memory usage in bytes.
+   */
+  getMemoryUsage() {
+    if (!this._memoryUsagePromise) {
+      let rejectCallback;
+      const promise = new Promise((resolve, reject) => {
+        this._resolveMemoryUsage = resolve;
+        rejectCallback = reject;
+      });
+      this._memoryUsagePromise = promise;
+      if (!this._child.connected && rejectCallback) {
+        rejectCallback(new Error('Child process is not running.'));
+        this._memoryUsagePromise = undefined;
+        this._resolveMemoryUsage = undefined;
+        return promise;
+      }
+      this._child.send([_types.CHILD_MESSAGE_MEM_USAGE], err => {
+        if (err && rejectCallback) {
+          this._memoryUsagePromise = undefined;
+          this._resolveMemoryUsage = undefined;
+          rejectCallback(err);
+        }
+      });
+      return promise;
+    }
+    return this._memoryUsagePromise;
+  }
+
+  /**
+   * Gets updated memory usage and restarts if required
+   */
+  checkMemoryUsage() {
+    if (this._childIdleMemoryUsageLimit) {
+      this._memoryUsageCheck = true;
+      this._child.send([_types.CHILD_MESSAGE_MEM_USAGE], err => {
+        if (err) {
+          console.error('Unable to check memory usage', err);
+        }
+      });
+    } else {
+      console.warn('Memory usage of workers can only be checked if a limit is set');
+    }
+  }
+  isWorkerRunning() {
+    return this._child.connected && !this._child.killed;
+  }
+}
+exports.ZP = ChildProcessWorker;
+
+/***/ }),
+
+/***/ "./src/workers/NodeThreadsWorker.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+var __webpack_unused_export__;
+
+
+__webpack_unused_export__ = ({
+  value: true
+});
+exports.Z = void 0;
+function _os() {
+  const data = require("os");
+  _os = function () {
+    return data;
+  };
+  return data;
+}
+function _worker_threads() {
+  const data = require("worker_threads");
+  _worker_threads = function () {
+    return data;
+  };
+  return data;
+}
+function _mergeStream() {
+  const data = _interopRequireDefault(require("merge-stream"));
+  _mergeStream = function () {
+    return data;
+  };
+  return data;
+}
+var _types = __webpack_require__("./src/types.ts");
+var _WorkerAbstract = _interopRequireDefault(__webpack_require__("./src/workers/WorkerAbstract.ts"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+class ExperimentalWorker extends _WorkerAbstract.default {
+  _worker;
+  _options;
+  _request;
+  _retries;
+  _onProcessEnd;
+  _onCustomMessage;
+  _stdout;
+  _stderr;
+  _memoryUsagePromise;
+  _resolveMemoryUsage;
+  _childWorkerPath;
+  _childIdleMemoryUsage;
+  _childIdleMemoryUsageLimit;
+  _memoryUsageCheck = false;
+  constructor(options) {
+    super(options);
+    this._options = options;
+    this._request = null;
+    this._stdout = null;
+    this._stderr = null;
+    this._childWorkerPath = options.childWorkerPath || require.resolve('./threadChild');
+    this._childIdleMemoryUsage = null;
+    this._childIdleMemoryUsageLimit = options.idleMemoryLimit || null;
+    this.initialize();
+  }
+  initialize() {
+    if (this.state === _types.WorkerStates.OUT_OF_MEMORY || this.state === _types.WorkerStates.SHUTTING_DOWN || this.state === _types.WorkerStates.SHUT_DOWN) {
+      return;
+    }
+    if (this._worker) {
+      this._worker.terminate();
+    }
+    this.state = _types.WorkerStates.STARTING;
+    this._worker = new (_worker_threads().Worker)(this._childWorkerPath, {
+      eval: false,
+      resourceLimits: this._options.resourceLimits,
+      stderr: true,
+      stdout: true,
+      workerData: this._options.workerData,
+      ...this._options.forkOptions
+    });
+    if (this._worker.stdout) {
+      if (!this._stdout) {
+        // We need to add a permanent stream to the merged stream to prevent it
+        // from ending when the subprocess stream ends
+        this._stdout = (0, _mergeStream().default)(this._getFakeStream());
+      }
+      this._stdout.add(this._worker.stdout);
+    }
+    if (this._worker.stderr) {
+      if (!this._stderr) {
+        // We need to add a permanent stream to the merged stream to prevent it
+        // from ending when the subprocess stream ends
+        this._stderr = (0, _mergeStream().default)(this._getFakeStream());
+      }
+      this._stderr.add(this._worker.stderr);
+    }
+
+    // This can be useful for debugging.
+    if (!(this._options.silent ?? true)) {
+      this._worker.stdout.setEncoding('utf8');
+      // eslint-disable-next-line no-console
+      this._worker.stdout.on('data', console.log);
+      this._worker.stderr.setEncoding('utf8');
+      this._worker.stderr.on('data', console.error);
+    }
+    this._worker.on('message', this._onMessage.bind(this));
+    this._worker.on('exit', this._onExit.bind(this));
+    this._worker.on('error', this._onError.bind(this));
+    this._worker.postMessage([_types.CHILD_MESSAGE_INITIALIZE, false, this._options.workerPath, this._options.setupArgs, String(this._options.workerId + 1) // 0-indexed workerId, 1-indexed JEST_WORKER_ID
+    ]);
+
+    this._retries++;
+
+    // If we exceeded the amount of retries, we will emulate an error reply
+    // coming from the child. This avoids code duplication related with cleaning
+    // the queue, and scheduling the next call.
+    if (this._retries > this._options.maxRetries) {
+      const error = new Error('Call retries were exceeded');
+      this._onMessage([_types.PARENT_MESSAGE_CLIENT_ERROR, error.name, error.message, error.stack, {
+        type: 'WorkerError'
+      }]);
+    }
+    this.state = _types.WorkerStates.OK;
+    if (this._resolveWorkerReady) {
+      this._resolveWorkerReady();
+    }
+  }
+  _onError(error) {
+    if (error.message.includes('heap out of memory')) {
+      this.state = _types.WorkerStates.OUT_OF_MEMORY;
+
+      // Threads don't behave like processes, they don't crash when they run out of
+      // memory. But for consistency we want them to behave like processes so we call
+      // terminate to simulate a crash happening that was not planned
+      this._worker.terminate();
+    }
+  }
+  _onMessage(response) {
+    // Ignore messages not intended for us
+    if (!Array.isArray(response)) return;
+    let error;
+    switch (response[0]) {
+      case _types.PARENT_MESSAGE_OK:
+        this._onProcessEnd(null, response[1]);
+        break;
+      case _types.PARENT_MESSAGE_CLIENT_ERROR:
+        error = response[4];
+        if (error != null && typeof error === 'object') {
+          const extra = error;
+          // @ts-expect-error: no index
+          const NativeCtor = globalThis[response[1]];
+          const Ctor = typeof NativeCtor === 'function' ? NativeCtor : Error;
+          error = new Ctor(response[2]);
+          error.type = response[1];
+          error.stack = response[3];
+          for (const key in extra) {
+            // @ts-expect-error: no index
+            error[key] = extra[key];
+          }
+        }
+        this._onProcessEnd(error, null);
+        break;
+      case _types.PARENT_MESSAGE_SETUP_ERROR:
+        error = new Error(`Error when calling setup: ${response[2]}`);
+
+        // @ts-expect-error: adding custom properties to errors.
+        error.type = response[1];
+        error.stack = response[3];
+        this._onProcessEnd(error, null);
+        break;
+      case _types.PARENT_MESSAGE_CUSTOM:
+        this._onCustomMessage(response[1]);
+        break;
+      case _types.PARENT_MESSAGE_MEM_USAGE:
+        this._childIdleMemoryUsage = response[1];
+        if (this._resolveMemoryUsage) {
+          this._resolveMemoryUsage(response[1]);
+          this._resolveMemoryUsage = undefined;
+          this._memoryUsagePromise = undefined;
+        }
+        this._performRestartIfRequired();
+        break;
+      default:
+        // Ignore messages not intended for us
+        break;
+    }
+  }
+  _onExit(exitCode) {
+    this._workerReadyPromise = undefined;
+    this._resolveWorkerReady = undefined;
+    if (exitCode !== 0 && this.state === _types.WorkerStates.OUT_OF_MEMORY) {
+      this._onProcessEnd(new Error('Jest worker ran out of memory and crashed'), null);
+      this._shutdown();
+    } else if (exitCode !== 0 && this.state !== _types.WorkerStates.SHUTTING_DOWN && this.state !== _types.WorkerStates.SHUT_DOWN || this.state === _types.WorkerStates.RESTARTING) {
+      this.initialize();
+      if (this._request) {
+        this._worker.postMessage(this._request);
+      }
+    } else {
+      // If the worker thread exits while a request is still pending, throw an
+      // error. This is unexpected and tests may not have run to completion.
+      const isRequestStillPending = !!this._request;
+      if (isRequestStillPending) {
+        this._onProcessEnd(new Error('A Jest worker thread exited unexpectedly before finishing tests for an unknown reason. One of the ways this can happen is if process.exit() was called in testing code.'), null);
+      }
+      this._shutdown();
+    }
+  }
+  waitForExit() {
+    return this._exitPromise;
+  }
+  forceExit() {
+    this.state = _types.WorkerStates.SHUTTING_DOWN;
+    this._worker.terminate();
+  }
+  send(request, onProcessStart, onProcessEnd, onCustomMessage) {
+    onProcessStart(this);
+    this._onProcessEnd = (...args) => {
+      const hasRequest = !!this._request;
+
+      // Clean the request to avoid sending past requests to workers that fail
+      // while waiting for a new request (timers, unhandled rejections...)
+      this._request = null;
+      if (this._childIdleMemoryUsageLimit && hasRequest) {
+        this.checkMemoryUsage();
+      }
+      const res = onProcessEnd?.(...args);
+
+      // Clean up the reference so related closures can be garbage collected.
+      onProcessEnd = null;
+      return res;
+    };
+    this._onCustomMessage = (...arg) => onCustomMessage(...arg);
+    this._request = request;
+    this._retries = 0;
+    this._worker.postMessage(request);
+  }
+  getWorkerId() {
+    return this._options.workerId;
+  }
+  getStdout() {
+    return this._stdout;
+  }
+  getStderr() {
+    return this._stderr;
+  }
+  _performRestartIfRequired() {
+    if (this._memoryUsageCheck) {
+      this._memoryUsageCheck = false;
+      let limit = this._childIdleMemoryUsageLimit;
+
+      // TODO: At some point it would make sense to make use of
+      // stringToBytes found in jest-config, however as this
+      // package does not have any dependencies on an other jest
+      // packages that can wait until some other time.
+      if (limit && limit > 0 && limit <= 1) {
+        limit = Math.floor((0, _os().totalmem)() * limit);
+      } else if (limit) {
+        limit = Math.floor(limit);
+      }
+      if (limit && this._childIdleMemoryUsage && this._childIdleMemoryUsage > limit) {
+        this.state = _types.WorkerStates.RESTARTING;
+        this._worker.terminate();
+      }
+    }
+  }
+
+  /**
+   * Gets the last reported memory usage.
+   *
+   * @returns Memory usage in bytes.
+   */
+  getMemoryUsage() {
+    if (!this._memoryUsagePromise) {
+      let rejectCallback;
+      const promise = new Promise((resolve, reject) => {
+        this._resolveMemoryUsage = resolve;
+        rejectCallback = reject;
+      });
+      this._memoryUsagePromise = promise;
+      if (!this._worker.threadId) {
+        rejectCallback(new Error('Child process is not running.'));
+        this._memoryUsagePromise = undefined;
+        this._resolveMemoryUsage = undefined;
+        return promise;
+      }
+      try {
+        this._worker.postMessage([_types.CHILD_MESSAGE_MEM_USAGE]);
+      } catch (err) {
+        this._memoryUsagePromise = undefined;
+        this._resolveMemoryUsage = undefined;
+        rejectCallback(err);
+      }
+      return promise;
+    }
+    return this._memoryUsagePromise;
+  }
+
+  /**
+   * Gets updated memory usage and restarts if required
+   */
+  checkMemoryUsage() {
+    if (this._childIdleMemoryUsageLimit) {
+      this._memoryUsageCheck = true;
+      this._worker.postMessage([_types.CHILD_MESSAGE_MEM_USAGE]);
+    } else {
+      console.warn('Memory usage of workers can only be checked if a limit is set');
+    }
+  }
+
+  /**
+   * Gets the thread id of the worker.
+   *
+   * @returns Thread id.
+   */
+  getWorkerSystemId() {
+    return this._worker.threadId;
+  }
+  isWorkerRunning() {
+    return this._worker.threadId >= 0;
+  }
+}
+exports.Z = ExperimentalWorker;
+
+/***/ }),
+
+/***/ "./src/workers/WorkerAbstract.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports["default"] = void 0;
+function _stream() {
+  const data = require("stream");
+  _stream = function () {
+    return data;
+  };
+  return data;
+}
+var _types = __webpack_require__("./src/types.ts");
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+class WorkerAbstract extends _stream().EventEmitter {
+  /**
+   * DO NOT WRITE TO THIS DIRECTLY.
+   * Use this.state getter/setters so events are emitted correctly.
+   */
+  #state = _types.WorkerStates.STARTING;
+  _fakeStream = null;
+  _exitPromise;
+  _resolveExitPromise;
+  _workerReadyPromise;
+  _resolveWorkerReady;
+  get state() {
+    return this.#state;
+  }
+  set state(value) {
+    if (this.#state !== value) {
+      const oldState = this.#state;
+      this.#state = value;
+      this.emit(_types.WorkerEvents.STATE_CHANGE, value, oldState);
+    }
+  }
+  constructor(options) {
+    super();
+    if (typeof options.on === 'object') {
+      for (const [event, handlers] of Object.entries(options.on)) {
+        // Can't do Array.isArray on a ReadonlyArray<T>.
+        // https://github.com/microsoft/TypeScript/issues/17002
+        if (typeof handlers === 'function') {
+          super.on(event, handlers);
+        } else {
+          for (const handler of handlers) {
+            super.on(event, handler);
+          }
+        }
+      }
+    }
+    this._exitPromise = new Promise(resolve => {
+      this._resolveExitPromise = resolve;
+    });
+    this._exitPromise.then(() => {
+      this.state = _types.WorkerStates.SHUT_DOWN;
+    });
+  }
+
+  /**
+   * Wait for the worker child process to be ready to handle requests.
+   *
+   * @returns Promise which resolves when ready.
+   */
+  waitForWorkerReady() {
+    if (!this._workerReadyPromise) {
+      this._workerReadyPromise = new Promise((resolve, reject) => {
+        let settled = false;
+        let to;
+        switch (this.state) {
+          case _types.WorkerStates.OUT_OF_MEMORY:
+          case _types.WorkerStates.SHUTTING_DOWN:
+          case _types.WorkerStates.SHUT_DOWN:
+            settled = true;
+            reject(new Error(`Worker state means it will never be ready: ${this.state}`));
+            break;
+          case _types.WorkerStates.STARTING:
+          case _types.WorkerStates.RESTARTING:
+            this._resolveWorkerReady = () => {
+              settled = true;
+              resolve();
+              if (to) {
+                clearTimeout(to);
+              }
+            };
+            break;
+          case _types.WorkerStates.OK:
+            settled = true;
+            resolve();
+            break;
+        }
+        if (!settled) {
+          to = setTimeout(() => {
+            if (!settled) {
+              reject(new Error('Timeout starting worker'));
+            }
+          }, 500);
+        }
+      });
+    }
+    return this._workerReadyPromise;
+  }
+
+  /**
+   * Used to shut down the current working instance once the children have been
+   * killed off.
+   */
+  _shutdown() {
+    this.state === _types.WorkerStates.SHUT_DOWN;
+
+    // End the permanent stream so the merged stream end too
+    if (this._fakeStream) {
+      this._fakeStream.end();
+      this._fakeStream = null;
+    }
+    this._resolveExitPromise();
+  }
+  _getFakeStream() {
+    if (!this._fakeStream) {
+      this._fakeStream = new (_stream().PassThrough)();
+    }
+    return this._fakeStream;
+  }
+}
+exports["default"] = WorkerAbstract;
+
+/***/ }),
+
+/***/ "./src/workers/messageParent.ts":
+/***/ ((__unused_webpack_module, exports, __webpack_require__) => {
+
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+exports["default"] = messageParent;
+function _worker_threads() {
+  const data = require("worker_threads");
+  _worker_threads = function () {
+    return data;
+  };
+  return data;
+}
+var _types = __webpack_require__("./src/types.ts");
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+function messageParent(message, parentProcess = process) {
+  if (!_worker_threads().isMainThread && _worker_threads().parentPort != null) {
+    _worker_threads().parentPort.postMessage([_types.PARENT_MESSAGE_CUSTOM, message]);
+  } else if (typeof parentProcess.send === 'function') {
+    parentProcess.send([_types.PARENT_MESSAGE_CUSTOM, message]);
+  } else {
+    throw new Error('"messageParent" can only be used inside a worker');
+  }
+}
+
+/***/ })
+
+/******/ 	});
+/************************************************************************/
+/******/ 	// The module cache
+/******/ 	var __webpack_module_cache__ = {};
+/******/ 	
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+/******/ 		// Check if module is in cache
+/******/ 		var cachedModule = __webpack_module_cache__[moduleId];
+/******/ 		if (cachedModule !== undefined) {
+/******/ 			return cachedModule.exports;
+/******/ 		}
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = __webpack_module_cache__[moduleId] = {
+/******/ 			// no module.id needed
+/******/ 			// no module.loaded needed
+/******/ 			exports: {}
+/******/ 		};
+/******/ 	
+/******/ 		// Execute the module function
+/******/ 		__webpack_modules__[moduleId](module, module.exports, __webpack_require__);
+/******/ 	
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+/******/ 	
+/************************************************************************/
+var __webpack_exports__ = {};
+// This entry need to be wrapped in an IIFE because it need to be isolated against other modules in the chunk.
+(() => {
+var exports = __webpack_exports__;
+
+
+Object.defineProperty(exports, "__esModule", ({
+  value: true
+}));
+Object.defineProperty(exports, "FifoQueue", ({
   enumerable: true,
@@ -11,4 +1619,4 @@ get: function () {
   }
-});
-Object.defineProperty(exports, 'PriorityQueue', {
+}));
+Object.defineProperty(exports, "PriorityQueue", ({
   enumerable: true,
@@ -18,5 +1626,5 @@ get: function () {
   }
-});
+}));
 exports.Worker = void 0;
-Object.defineProperty(exports, 'messageParent', {
+Object.defineProperty(exports, "messageParent", ({
   enumerable: true,
@@ -26,5 +1634,5 @@ get: function () {
   }
-});
+}));
 function _os() {
-  const data = require('os');
+  const data = require("os");
   _os = function () {
@@ -36,3 +1644,3 @@ return data;
 function _path() {
-  const data = require('path');
+  const data = require("path");
   _path = function () {
@@ -44,3 +1652,3 @@ return data;
 function _url() {
-  const data = require('url');
+  const data = require("url");
   _url = function () {
@@ -51,10 +1659,8 @@ return data;
 }
-var _Farm = _interopRequireDefault(require('./Farm'));
-var _WorkerPool = _interopRequireDefault(require('./WorkerPool'));
-var _PriorityQueue = _interopRequireDefault(require('./PriorityQueue'));
-var _FifoQueue = _interopRequireDefault(require('./FifoQueue'));
-var _messageParent = _interopRequireDefault(require('./workers/messageParent'));
-function _interopRequireDefault(obj) {
-  return obj && obj.__esModule ? obj : {default: obj};
-}
+var _Farm = _interopRequireDefault(__webpack_require__("./src/Farm.ts"));
+var _WorkerPool = _interopRequireDefault(__webpack_require__("./src/WorkerPool.ts"));
+var _PriorityQueue = _interopRequireDefault(__webpack_require__("./src/PriorityQueue.ts"));
+var _FifoQueue = _interopRequireDefault(__webpack_require__("./src/FifoQueue.ts"));
+var _messageParent = _interopRequireDefault(__webpack_require__("./src/workers/messageParent.ts"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 /**
@@ -73,5 +1679,3 @@ * Copyright (c) Meta Platforms, Inc. and affiliates.
     const module = require(workerPath);
-    exposedMethods = Object.keys(module).filter(
-      name => typeof module[name] === 'function'
-    );
+    exposedMethods = Object.keys(module).filter(name => typeof module[name] === 'function');
     if (typeof module === 'function') {
@@ -84,5 +1688,3 @@ exposedMethods = [...exposedMethods, 'default'];
 function getNumberOfCpus() {
-  return typeof _os().availableParallelism === 'function'
-    ? (0, _os().availableParallelism)()
-    : (0, _os().cpus)().length;
+  return typeof _os().availableParallelism === 'function' ? (0, _os().availableParallelism)() : (0, _os().cpus)().length;
 }
@@ -138,4 +1740,3 @@
       maxRetries: this._options.maxRetries ?? 3,
-      numWorkers:
-        this._options.numWorkers ?? Math.max(getNumberOfCpus() - 1, 1),
+      numWorkers: this._options.numWorkers ?? Math.max(getNumberOfCpus() - 1, 1),
       resourceLimits: this._options.resourceLimits ?? {},
@@ -145,24 +1746,17 @@ setupArgs: this._options.setupArgs ?? []
     if (this._options.WorkerPool) {
-      this._workerPool = new this._options.WorkerPool(
-        workerPath,
-        workerPoolOptions
-      );
+      this._workerPool = new this._options.WorkerPool(workerPath, workerPoolOptions);
     } else {
       this._workerPool = new _WorkerPool.default(workerPath, workerPoolOptions);
     }
-    this._farm = new _Farm.default(
-      workerPoolOptions.numWorkers,
-      this._workerPool.send.bind(this._workerPool),
-      {
-        computeWorkerKey: this._options.computeWorkerKey,
-        taskQueue: this._options.taskQueue,
-        workerSchedulingPolicy: this._options.workerSchedulingPolicy
-      }
-    );
+    this._farm = new _Farm.default(workerPoolOptions.numWorkers, this._workerPool.send.bind(this._workerPool), {
+      computeWorkerKey: this._options.computeWorkerKey,
+      taskQueue: this._options.taskQueue,
+      workerSchedulingPolicy: this._options.workerSchedulingPolicy
+    });
     this._bindExposedWorkerMethods(workerPath, this._options);
   }
   _bindExposedWorkerMethods(workerPath, options) {
-    getExposedMethods(workerPath, options).forEach(name => {
+    for (const name of getExposedMethods(workerPath, options)) {
       if (name.startsWith('_')) {
-        return;
+        continue;
       }
@@ -177,3 +1771,3 @@
       this[name] = this._callFunctionWithArgs.bind(this, name);
-    });
+    }
   }
@@ -204,1 +1798,6 @@ _callFunctionWithArgs(method, ...args) {
 exports.Worker = Worker;
+})();
+
+module.exports = __webpack_exports__;
+/******/ })()
+;

package.json

 {
   "name": "jest-worker",
-  "version": "29.7.0",
+  "version": "30.0.0-alpha.1",
   "repository": {
@@ -15,2 +15,4 @@ "type": "git",
       "types": "./build/index.d.ts",
+      "require": "./build/index.js",
+      "import": "./build/index.mjs",
       "default": "./build/index.js"
@@ -22,3 +24,3 @@ },
     "@types/node": "*",
-    "jest-util": "^29.7.0",
+    "jest-util": "30.0.0-alpha.1",
     "merge-stream": "^2.0.0",
@@ -33,8 +35,8 @@ "supports-color": "^8.0.0"
     "get-stream": "^6.0.0",
-    "jest-leak-detector": "^29.7.0",
-    "tsd-lite": "^0.7.0",
+    "jest-leak-detector": "30.0.0-alpha.1",
+    "tsd-lite": "^0.8.0",
     "worker-farm": "^1.6.0"
   },
   "engines": {
-    "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
+    "node": "^16.10.0 || ^18.12.0 || >=20.0.0"
   },
@@ -44,3 +46,3 @@ "publishConfig": {
   },
-  "gitHead": "4e56991693da7cd4c3730dc3579a1dd1403ee630"
+  "gitHead": "d005cb2505c041583e0c5636d006e08666a54b63"
 }

README.md

@@ -236,3 +236,3 @@ # jest-worker
   // Wait a bit.
-  await sleep(10000);
+  await sleep(10_000);
 
@@ -239,0 +239,0 @@ // Transform the same file again. Will immediately return because the

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Shell access

Supply chain risk

This module accesses the system shell. Accessing the system shell increases the risk of executing arbitrary code.

Found 1 instance in 1 package

No v1

Quality

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

Found 1 instance in 1 package

Fixed alerts

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License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Shell access

Supply chain risk

This module accesses the system shell. Accessing the system shell increases the risk of executing arbitrary code.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

100096

increased by10.22%

Lines of code

2469

increased by1.81%

Worsened metrics

Number of package files

8

decreased by-52.94%

Number of low quality alerts

2

increased by100%

Number of medium supply chain risk alerts

2

increased by100%

Dependency changes

• + Added@jest/schemas@30.0.0-alpha.1(transitive)

• + Added@jest/types@30.0.0-alpha.1(transitive)

• + Added@sinclair/typebox@0.31.28(transitive)

• + Addedci-info@4.0.0(transitive)

• + Addedjest-util@30.0.0-alpha.1(transitive)

• - Removed@jest/schemas@29.6.3(transitive)

• - Removed@jest/types@29.6.3(transitive)

• - Removed@sinclair/typebox@0.27.8(transitive)

• - Removedci-info@3.9.0(transitive)

• - Removedjest-util@29.7.0(transitive)

• Updatedjest-util@30.0.0-alpha.1