Add support for jest.clearAllMocks and jest.resetAllMocks

[vajahath]

This PR aims to add support for jest.clearAllMocks and jest.resetAllMocks.
Fixes #18

• Show proper error message instead of the existing error log TypeError: Cannot read properties of undefined (reading 'length'). Now shows TypeError: jest.clearAllMocks is not a function. Fixed in 14336c3
• Support jest.clearAllMocks
• Support jest.resetAllMocks
• Tested

Need a small help with last 2 tasks

Thanks for hinting me where to change. I tried this, and I'm facing a small issue.

I could have done like this in the global.setup.js:

// excerpt
globalThis.jest = {
  fn: mock.fn,
  spyOn: mock.spyOn,
  clearAllMocks: mock.JestMock.clearAllMocks.bind(mock.JestMock),
  // ...
};

But the jest-mock package seem not exporting the JestMock instance. So I can't do mock.JestMock.<thing>.
https://github.com/facebook/jest/blob/d2f3dc694d72c0208f47fc2e2ca101e26a9a6d68/packages/jest-mock/src/index.ts#L1239-L1243

Could someone help?

[nicolo-ribaudo]

We could instantiate ModuleMocker ourselves and use it to grab also fn and spyOn.

[nicolo-ribaudo]

@vajahath This looks good; let me know when you have verified that it works in your app! (we don't have unit tests yet 😬)

[vajahath]

Yes I just verified with my couple of projects.

[nicolo-ribaudo]

Thanks!