Can't mock module imported inside dependency

[joao8lopes]

Hi team 👋🏽

I'm encountering an issue where a module imported within a dependency is not mocked as expected during testing.

Example:

handler.ts

import { apiHandler } from 'api-handler';

const hello = () => {
  return apiHandler();
};

api-handler.ts

import { Log } from 'log'

const apiHandler = () => {
  const log = new Log();
  log.info('This is my log');
}

in the unit test, index.test.ts

vi.mock('log');

test('my test', async () => {
  await hello();
  // assertions 
})

When running npx vitest, I still see the log This is my log in the console. I expected this not to happen since 'log' is being mocked. The same issue occurs when trying to mock the implementation of a function that's being created and used inside api-handler where the mocked function is not called and instead, the original function is.

Is there a reason why the mock isn't being applied as expected?

Thank you!