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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.
import type {Circus} from '@jest/types';
import {dispatchSync} from './state';
const uncaught: NodeJS.UncaughtExceptionListener &
NodeJS.UnhandledRejectionListener = (error: unknown) => {
dispatchSync({error, name: 'error'});
export const injectGlobalErrorHandlers = (
parentProcess: NodeJS.Process,
): Circus.GlobalErrorHandlers => {
const uncaughtException = process.listeners('uncaughtException').slice();
const unhandledRejection = process.listeners('unhandledRejection').slice();
parentProcess.on('uncaughtException', uncaught);
parentProcess.on('unhandledRejection', uncaught);
return {uncaughtException, unhandledRejection};
export const restoreGlobalErrorHandlers = (
parentProcess: NodeJS.Process,
originalErrorHandlers: Circus.GlobalErrorHandlers,
): void => {
parentProcess.removeListener('uncaughtException', uncaught);
parentProcess.removeListener('unhandledRejection', uncaught);
for (const listener of originalErrorHandlers.uncaughtException) {
parentProcess.on('uncaughtException', listener);
for (const listener of originalErrorHandlers.unhandledRejection) {
parentProcess.on('unhandledRejection', listener);