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node_modules/jest-worker/build/base/BaseWorkerPool.d.ts

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+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+/// <reference types="node" />
+import { PoolExitResult, WorkerInterface, WorkerOptions, WorkerPoolOptions } from '../types';
+export default class BaseWorkerPool {
+    private readonly _stderr;
+    private readonly _stdout;
+    protected readonly _options: WorkerPoolOptions;
+    private readonly _workers;
+    constructor(workerPath: string, options: WorkerPoolOptions);
+    getStderr(): NodeJS.ReadableStream;
+    getStdout(): NodeJS.ReadableStream;
+    getWorkers(): Array<WorkerInterface>;
+    getWorkerById(workerId: number): WorkerInterface;
+    createWorker(_workerOptions: WorkerOptions): WorkerInterface;
+    end(): Promise<PoolExitResult>;
+}

node_modules/jest-worker/build/base/BaseWorkerPool.js

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+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = void 0;
+
+function path() {
+  const data = _interopRequireWildcard(require('path'));
+
+  path = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _mergeStream() {
+  const data = _interopRequireDefault(require('merge-stream'));
+
+  _mergeStream = function () {
+    return data;
+  };
+
+  return data;
+}
+
+var _types = require('../types');
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+function _getRequireWildcardCache(nodeInterop) {
+  if (typeof WeakMap !== 'function') return null;
+  var cacheBabelInterop = new WeakMap();
+  var cacheNodeInterop = new WeakMap();
+  return (_getRequireWildcardCache = function (nodeInterop) {
+    return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
+  })(nodeInterop);
+}
+
+function _interopRequireWildcard(obj, nodeInterop) {
+  if (!nodeInterop && obj && obj.__esModule) {
+    return obj;
+  }
+  if (obj === null || (typeof obj !== 'object' && typeof obj !== 'function')) {
+    return {default: obj};
+  }
+  var cache = _getRequireWildcardCache(nodeInterop);
+  if (cache && cache.has(obj)) {
+    return cache.get(obj);
+  }
+  var newObj = {};
+  var hasPropertyDescriptor =
+    Object.defineProperty && Object.getOwnPropertyDescriptor;
+  for (var key in obj) {
+    if (key !== 'default' && Object.prototype.hasOwnProperty.call(obj, key)) {
+      var desc = hasPropertyDescriptor
+        ? Object.getOwnPropertyDescriptor(obj, key)
+        : null;
+      if (desc && (desc.get || desc.set)) {
+        Object.defineProperty(newObj, key, desc);
+      } else {
+        newObj[key] = obj[key];
+      }
+    }
+  }
+  newObj.default = obj;
+  if (cache) {
+    cache.set(obj, newObj);
+  }
+  return newObj;
+}
+
+function _defineProperty(obj, key, value) {
+  if (key in obj) {
+    Object.defineProperty(obj, key, {
+      value: value,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    });
+  } else {
+    obj[key] = value;
+  }
+  return obj;
+}
+
+// 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 */
+
+const emptyMethod = () => {};
+
+class BaseWorkerPool {
+  constructor(workerPath, options) {
+    _defineProperty(this, '_stderr', void 0);
+
+    _defineProperty(this, '_stdout', void 0);
+
+    _defineProperty(this, '_options', void 0);
+
+    _defineProperty(this, '_workers', void 0);
+
+    this._options = options;
+    this._workers = new Array(options.numWorkers);
+
+    if (!path().isAbsolute(workerPath)) {
+      workerPath = require.resolve(workerPath);
+    }
+
+    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,
+        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];
+  }
+
+  createWorker(_workerOptions) {
+    throw Error('Missing method createWorker in WorkerPool');
+  }
+
+  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;