[Bug]: Jest 29 not respecting `mock` prefix for variables when hoisting

Version

29.1.1

Steps to reproduce

1. clone https://github.com/jcollum-nutrien/jest-mock-issue
2. yarn
3. yarn test

Dupe of #10996, which is locked (but also a year old)

Expected behavior

Variables prefixed with mock should be hoisted, as the docs state.

Actual behavior

Cannot access 'mockInfo' before initialization

yarn run v1.22.15
$ jest
 FAIL  ./logger.spec.ts
  ● Test suite failed to run

    ReferenceError: Cannot access 'mockInfo' before initialization

       5 | jest.mock('./logger', ()=>{
       6 |   return {
    >  7 |     info: mockInfo
         |           ^
       8 |   }
       9 | })
      10 | describe('repro', function () {

      at mockInfo (logger.spec.ts:7:11)
      at Object.<anonymous> (logger.spec.ts:4:1)

Additional context

No response

Environment

npx envinfo --preset jest
npx: installed 1 in 0.74s

  System:
    OS: macOS 12.5.1
    CPU: (10) x64 Apple M1 Pro
  Binaries:
    Node: 14.19.2 - ~/.nvm/versions/node/v14.19.2/bin/node
    Yarn: 1.22.19 - ~/work/jest-mock-issue/node_modules/.bin/yarn
    npm: 6.14.17 - ~/.nvm/versions/node/v14.19.2/bin/npm
  npmPackages:
    jest: 29.1.1 => 29.1.1

[mrazauskas]

With two changes in your reproduction seems to be working:

1. Use babel-jest as a transformer. It works as documented. If a third party transformer does not work for you, Jest can’t help here.
2. Please read this section carefully and rework with test:

jest.mock("./logger", () => {
  return jest.fn().mockImplementation(() => {
    return { info: mockInfo };
  });
});

The ‘ReferenceError’ issue should be gone. (Note that I did not try to make your test pass, that is not in the scope of the issue.)

[jcollum-nutrien]

For anyone who finds this later: I switched it over to babel-jest. Still ran into issues, had to change the mock to:

const mockInfo = jest.fn();
jest.mock('./logger', () => {
  return {
    Logger: jest.fn().mockImplementation(() => {
      return {
        info: mockInfo
      }
    })
  }
});

Repo has been updated. Test is passing.