jest.clearAllMocks(); does not remove mock implementation within `afterEach`

🐛 Bug Report

jest.clearAllMocks(); does not remove mock implementation within afterEach

To Reproduce

I have a file called src/layouts/index.js

// ./src/layouts/index.js
const importAll = (r) =>
    r.keys().reduce(
        (acc, key) => ({
            ...acc,
            [key.replace(/^\.\/(.*).json$/, '$1')]: r(key)
        }),
        {}
    );

module.exports = importAll(require.context('./', true, /\.json$/));

It utilizes webpack require.context so I am trying to mock with jest.mock.

I have another file… say file util.js

//./src/util.js
import layouts from '../layouts';
export const getLayout(name) {
  return layouts[name];
}

in my test I’m trying to clear the mocks after each test

//./src/util.test.js
describe('my test suite', () => {
  afterEach(() => {
     jest.clearAllMocks();
  })
  test('test number one', () => {
      jest.mock('./layouts', () => ({
          layout1 : { a : 1 },
          layout2 : { b: 2 },
     }));
     assert.equals(getLayout('layout1').a, 1);
     assert.equals(getLayout('layout2').b, 2);
  });
  test('test number two', () => {
     assert.equals(getLayout('layout1').a, 1);
     assert.equals(getLayout('layout2').b, 2);
  });
});

Expected behavior

I would expect for the first test to pass and the second test to fail… because the mock should have been cleared.

Link to repl or repo (highly encouraged)

https://repl.it/@CharlieHoover/SorrowfulBackSandboxes

[cphoover]

FYI The mocking documentation and API is extremely unclear, and overly complicated IMHO.

[damien-roche]

I think the default config should include:

{
  restoreMocks: true,
  clearMocks: true,
  resetMocks: true
} 

It is shocking that the default behaviour is to vomit state between tests. Can you please just keep my tests isolated by default? Then the [hopeful minority] who want to spread state across multiple tests can do so by opt-in.