ts-auto-mock

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Subject of the issue

When used in a Jest ESM environment, attempting to import createMock results in a error:

  ● Test suite failed to run

    SyntaxError: The requested module 'ts-auto-mock' does not provide an export named 'createMock'

      at Runtime.linkAndEvaluateModule (node_modules/jest-runtime/build/index.js:682:5)

Your environment

• ts-auto-mock version: 3.6.4
• typescript version: 4.9.4
• node version: 18.12.1
• yarn version: 1.22.19
• jest version: 29.3.1
• jest-ts-auto-mock version: 2.1.0

Steps to reproduce

Reproducible example available here. Project is set up in accordance to the Jest ESM docs.

Expected behavior

ts-auto-mock should work fine in ESM environments.

Actual behavior

ts-auto-mock doesn't work in ESM environments as importing it results in an error.

Hey, I've looked into this a while ago and I couldn't figure it out yet! Happy to see a PR for the changes required to the build process!

This is a weird interaction with the "named" exports becoming the default import. So instead of this

import { createMock } from 'ts-auto-mock';

it needs to be

import autoMock from 'ts-auto-mock';
const { createMock } = autoMock;

Looking into how the index.js file can be patched to fix this.

---

This also happens regardless of whether the transformer ran successfully or not, since it does not remove these "fake" imports.

It looks like the current compiled code does

module.exports = { createMock: ... }

And it needs to do

module.exports.createMock = ...;

$ yarn node
Welcome to Node.js v22.3.0.
> await import('ts-auto-mock')
[Module: null prototype] {
  createHydratedMock: [Function (anonymous)],
  createMock: [Function (anonymous)],
  createMockList: [Function (anonymous)],
  default: {
    registerMock: [Function (anonymous)],
    createHydratedMock: [Function (anonymous)],
    createMockList: [Function (anonymous)],
    createMock: [Function (anonymous)]
  },
  registerMock: [Function (anonymous)]
}

Here's a yarn patch file that fixes both this & #1094

ts-auto-mock-npm-3.7.3-caa6a18d65.patch