The first argument of jest.mock(...) must be a module path:
jest.mock('../../src/utils');
because the utils module is your code, not a 3rd lib, so you must learn manual mock of jest:
https://facebook.github.io/jest/docs/en/manual-mocks.html
if you had this file: src/utils.js
you can mock it by creating a file: src/__mocks__/utils.js
content of this file is the replication of the original but replace the implementation by getData = jest.fn()
on you test file, just call: jest.mock('../../src/utils'); at begin of file.
then when you’re familiar with, you can call that function inside beforeEach() and call its counter jest.unmock('../../src/utils'); insider afterEach()
An easy way to think about it is that:
when you call jest.mock('../../src/utils');, it means you tell jest that:
hey if the running test meets the line
require('../../src/utils'), don’t load it, let load../../src/__mocks__/utils.