Jest - Class Mocking

getSomethingFromSampleClass.js

import SampleClass from './SampleClass';

export default function getSomethingFromSampleClass() { 
  const sampleClass = new SampleClass();
  return sampleClass.getSomething();
}

getSomethingFromSampleClass.test.js

import getSomethingFromSampleClass from './getSomethingFromSampleClass';
import SampleClass from './SampleClass';
jest.mock('./SampleClass');

test('getSomethingFromSampleClass should return expected value', () => {
  const expected = 'other thing';
  SampleClass.prototype.getSomething.mockImplementation(() => expected);
  
  const actual = getSomethingFromSampleClass();
  expect(actual).toEqual(expected);
});

SampleClass.js

export default class SampleClass { 
  getSomething() { 
    return 'something';
  }
}

what if getSomething() method also in getSomethingFromSampleClass.js class?