https://github.com/simotae14/js-mocking-fundamentals

javascript mocking monkey-patching solution
https://github.com/simotae14/js-mocking-fundamentals

Last synced: 9 days ago
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javascript mocking monkey-patching solution

• Host: GitHub
• URL: https://github.com/simotae14/js-mocking-fundamentals
• Owner: simotae14
• Created: 2019-12-24T14:29:51.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2022-12-10T13:02:34.000Z (almost 2 years ago)
• Last Synced: 2024-04-17T05:04:44.599Z (7 months ago)
• Language: JavaScript
• Size: 854 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 11
• Metadata Files:
  • Readme: README.md

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README

        


  JavaScript Mocking Fundamentals





  Learn how mocking in JavaScript tests works by implementing them from scratch!





In this material, we have a set of `no-framework` tests that correspond to a set

of jest tests (in the `__tests__` directory). The idea is that (with the

exception of the first test), you look at the jest version first, then see how

that would be implemented without a testing framework.

Order of material:

1.  `monkey-patching.js` (no jest version)

2.  `mock-fn.js`

3.  `spy.js`

4.  `inline-module-mock.js`

5.  `external-mock-module.js`

The files are intended to test the `thumb-war.js` module and mock the `utils`

module.

To run the tests, run `npx jest`. To start watch mode run `npx jest --watch`

## Custom jest runner.

You can definitely run the `no-framework` files just using `node` (like this:

`node src/no-framework/monkey-patching.js`), but in an effort to make running

these easier, I created a custom jest runner that uses jest to run the files,

but allow them to be run without the jest testing framework. It's really cool.

It uses [`create-jest-runner`](https://www.npmjs.com/package/create-jest-runner)

and should probably be published eventually.