https://github.com/azz/jest-magic-mock

https://github.com/azz/jest-magic-mock

Last synced: 2 months ago
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• Host: GitHub
• URL: https://github.com/azz/jest-magic-mock
• Owner: azz
• Created: 2019-06-18T14:43:13.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2023-01-04T00:46:45.000Z (almost 2 years ago)
• Last Synced: 2024-10-12T03:17:25.267Z (3 months ago)
• Language: JavaScript
• Size: 975 KB
• Stars: 4
• Watchers: 2
• Forks: 1
• Open Issues: 14
• Metadata Files:
  • Readme: README.md

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README

        
# `jest-magic-mock`

> **EXPERIMENT**: Do not actually use this, I think?

This is a JavaScript implementation of a Magic Mock, inspired by Python's [`unittest.mock.MagicMock`](https://docs.python.org/3/library/unittest.mock.html#unittest.mock.MagicMock). It is implemented using [`Proxy`](https://mdn.io/proxy).

## API

```js

import magicMock from 'jest-magic-mock';

test('has all of the properties', () => {

  const mock = magicMock();

  expect(mock.foo.bar.baz[2]).toBeDefined();

});

test('can mock individual properties', () => {

  const mock = magicMock();

  mock.foo.mockReturnValue(3);

  mock.bar.baz.mockImplementation(x => x * x);

  expect(mock.foo()).toEqual(3);

  expect(mock.bar.baz(3)).toEqual(9);

  expect(mock()).toEqual(undefined);

});

```

See [the tests](./src/__tests__/index.test.js) for more examples.