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jest mock function export

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codeAesthetic answered on June 19, 2022 Popularity 10/10 Helpfulness 4/10

answer jest mock function export

related jest mock require module

related mock function jest

jest mock function export

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-2

You can mock multiple exported function from file via below method see stackoverflow for reference

// myModule.test.js

import { otherFn } from './myModule.js'

jest.mock('./myModule.js', () => ({
  ...(jest.requireActual('./myModule.js')),
  otherFn: jest.fn()
}))

describe('test category', () => {
  it('tests something about otherFn', () => {
    otherFn.mockReturnValue('foo')
    expect(otherFn()).toBe('foo')
  })
})

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: export function javascript

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Contributed on Feb 26 2023

codeAesthetic

0 Answers Avg Quality 2/10

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jest mock require module

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beforeEach(() =>  {
    jest.resetModules();
});

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Mar 12 2023

silvio2402

0 Answers Avg Quality 2/10

mock function jest

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/*
The Mock Function
The goal for mocking is to replace something we don’t control with something 
we do, so it’s important that what we replace it with has all the features 
we need.

The Mock Function provides features to:

1. Capture calls
2. Set return values
3. Change the implementation

The simplest way to create a Mock Function instance is with jest.fn()
*/

test("returns undefined by default", () => {
  const mock = jest.fn();

  let result = mock("foo");

  expect(result).toBeUndefined();
  expect(mock).toHaveBeenCalled();
  expect(mock).toHaveBeenCalledTimes(1);
  expect(mock).toHaveBeenCalledWith("foo");
});

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: medium.com

Tags: function functio

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Contributed on Jun 19 2022

yusuf_fazeri

0 Answers Avg Quality 2/10

jest mock function export

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