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Cannot find module 'core-js/modules/es6.regexp.split'

See original GitHub issue

🐛 Bug Report

Using any of the modules provided my core-js/packages returns this error. Jest targets the old structure of core-js

To Reproduce

yarn add core-js -D

defineStack.js

const defineStack = (stack) => {
  // Converting the exisiting string trace into an array
  stack = stack.split('\n');

  // Removing the first 2 elements of the array
  for (let i = 0; i < 3; ++i) {
    stack.shift();
  }

  // Returning the value of this.stack to the required stack trace
  return stack.join('\n').trim();
}

export default defineStack;

_tests_/defineStack.js

import defineStack from '../defineStack';

test('trims the stack and returns proper information', () => {
  console.log(defineStack);
});

Expected behavior

The tests should pass and log the function definition

Run `npx envinfo --preset jest`

  System:
    OS: macOS 10.14.4
    CPU: (12) x64 Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz
  Binaries:
    Node: 10.15.0 - /usr/local/bin/node
    Yarn: 1.16.0 - ~/.yarn/bin/yarn
    npm: 6.9.0 - ~/.npm-packages/bin/npm
  npmPackages:
    jest: ^24.8.0 => 24.8.0

Issue Analytics

State:
Created 4 years ago
Comments:8 (2 by maintainers)

Top GitHub Comments

5reactions

AndrewLeedhamcommented, May 23, 2019

@AmaanKulshreshtha Babel currently assumes you are using corejs@2. You should be able to add corejs: 3 to your @babel/preset-env options to fix this 😃

e.g.

{
  presets: [
    [
      '@babel/env',
      {
        targets: {
          // ...
        },
        useBuiltIns: 'usage',
        corejs: 3
      }
    ]
}

1reaction

SimenBcommented, May 23, 2019

We need babel to have test coverage and mocks, which is why it’s on by default.

You need it to live at the top level of node_modules. It being hoisted by the package manager is an implementation detail.

Jest has bundled babel-jest for ~10 versions

That said, this issue is about babel configuration, it’s not an issue with Jest.

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