universal-mock

A JavaScript object that is everything...Yarn:

yarn add universal-mock -D

Universal Mock is developed using Yarn
npm:

npm install --save-dev universal-mock

Universal Mock is an object that pretends to have every property, and will return a Universal Mock for everything, so you can do

import { mock } from "universal-mock";

mock.anythingAtAll === undefined; // false!
mock.anythingAtAll === null; // false!
mock.something.somethingElse.whatever; // OK
let value = mock.someOtherRandom(); // It's a function!
mock.someMethod = jest.fn(); // It works great with Jest!

You can also set pre-determined value for any mock at any level:

mock.value = 42;
console.log(mock.value); // Returns "42"

mock.something = () => "Hello!";
console.log(mock.something()); // "Hello!"

You can also generate new mock instances:

import { createMock } from "universal-mock";

const myMock = createMock();

Universal Mock is useful when you only want to mock out part of an object and don't care about the rest. This is particularly useful in TypeScript where interfaces may require you to implement everything.