how to change jest mock function return value in each test?

Question

I have a mock module like this in my component test file

  jest.mock(\'../../../magic/index\', () => ({
    navigationEnabled: () => true,
    guidance         


        

Answer 1

You can mock the module so it returns spies and import it into your test:

import {navigationEnabled, guidanceEnabled} from '../../../magic/index'

jest.mock('../../../magic/index', () => ({
    navigationEnabled: jest.fn(),
    guidanceEnabled: jest.fn()
}));

Then later on you can change the actual implementation using mockImplementation

navigationEnabled.mockImplementation(()=> true)
//or
navigationEnabled.mockReturnValueOnce(true);

and in the next test

navigationEnabled.mockImplementation(()=> false)
//or
navigationEnabled.mockReturnValueOnce(false);