Updating NPM dependencies

node_modules/jest-worker/build/workers/threadChild.js

@@ -3,47 +3,29 @@
 function _worker_threads() {
   const data = require('worker_threads');
 
-  _worker_threads = function _worker_threads() {
+  _worker_threads = function () {
     return data;
   };
 
   return data;
 }
 
-var _types = require('../types');
+function _types() {
+  const data = require('../types');
 
-function _objectSpread(target) {
-  for (var i = 1; i < arguments.length; i++) {
-    var source = arguments[i] != null ? arguments[i] : {};
-    var ownKeys = Object.keys(source);
-    if (typeof Object.getOwnPropertySymbols === 'function') {
-      ownKeys = ownKeys.concat(
-        Object.getOwnPropertySymbols(source).filter(function(sym) {
-          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
-        })
-      );
-    }
-    ownKeys.forEach(function(key) {
-      _defineProperty(target, key, source[key]);
-    });
-  }
-  return target;
-}
-
-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;
+  _types = function () {
+    return data;
+  };
+
+  return data;
 }
 
+/**
+ * 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.
+ */
 let file = null;
 let setupArgs = [];
 let initialized = false;
@@ -61,20 +43,20 @@ let initialized = false;
  * non-zero exit code.
  */
 
-_worker_threads().parentPort.on('message', request => {
+const messageListener = request => {
   switch (request[0]) {
-    case _types.CHILD_MESSAGE_INITIALIZE:
+    case _types().CHILD_MESSAGE_INITIALIZE:
       const init = request;
       file = init[2];
       setupArgs = request[3];
       break;
 
-    case _types.CHILD_MESSAGE_CALL:
+    case _types().CHILD_MESSAGE_CALL:
       const call = request;
       execMethod(call[2], call[3]);
       break;
 
-    case _types.CHILD_MESSAGE_END:
+    case _types().CHILD_MESSAGE_END:
       end();
       break;
 
@@ -83,22 +65,27 @@ _worker_threads().parentPort.on('message', request => {
         'Unexpected request from parent process: ' + request[0]
       );
   }
-});
+};
+
+_worker_threads().parentPort.on('message', messageListener);
 
 function reportSuccess(result) {
   if (_worker_threads().isMainThread) {
     throw new Error('Child can only be used on a forked process');
   }
 
-  _worker_threads().parentPort.postMessage([_types.PARENT_MESSAGE_OK, result]);
+  _worker_threads().parentPort.postMessage([
+    _types().PARENT_MESSAGE_OK,
+    result
+  ]);
 }
 
 function reportClientError(error) {
-  return reportError(error, _types.PARENT_MESSAGE_CLIENT_ERROR);
+  return reportError(error, _types().PARENT_MESSAGE_CLIENT_ERROR);
 }
 
 function reportInitializeError(error) {
-  return reportError(error, _types.PARENT_MESSAGE_SETUP_ERROR);
+  return reportError(error, _types().PARENT_MESSAGE_SETUP_ERROR);
 }
 
 function reportError(error, type) {
@@ -115,7 +102,7 @@ function reportError(error, type) {
     error.constructor && error.constructor.name,
     error.message,
     error.stack,
-    typeof error === 'object' ? _objectSpread({}, error) : error
+    typeof error === 'object' ? {...error} : error
   ]);
 }
 
@@ -131,7 +118,8 @@ function end() {
 }
 
 function exitProcess() {
-  process.exit(0);
+  // Clean up open handles so the worker ideally exits gracefully
+  _worker_threads().parentPort.removeListener('message', messageListener);
 }
 
 function execMethod(method, args) {
@@ -158,6 +146,11 @@ function execMethod(method, args) {
   execFunction(main.setup, main, setupArgs, execHelper, reportInitializeError);
 }
 
+const isPromise = obj =>
+  !!obj &&
+  (typeof obj === 'object' || typeof obj === 'function') &&
+  typeof obj.then === 'function';
+
 function execFunction(fn, ctx, args, onResult, onError) {
   let result;
 
@@ -168,7 +161,7 @@ function execFunction(fn, ctx, args, onResult, onError) {
     return;
   }
 
-  if (result && typeof result.then === 'function') {
+  if (isPromise(result)) {
     result.then(onResult, onError);
   } else {
     onResult(result);