Mock-Factory-Pattern in TypeScript

This repository shows a mock-factory-pattern-example in typescript.

The mock-factory-pattern uses a combination of TypeScript's Partial together with a factory function to be able to create scalabe, reusable and focused test data:

const defaultObject: ExampleType = {
  key1: 'value1',
  key2: 'value2'
  // ...
};

const createMockObject = (overwrites: Partial<ExampleType> = {}) => ({
  ...defaultObject,
  ...overwrites
});

export {
  createMockObject
};

You can find two implementations of this pattern here:

src/createMockUser.ts: simple example
src/createMockTodo.ts: example using cloneDeep to ensure immutability.

You can read more about it in my blog-post which this repository accompanies.

Setup

To execute the tests:

Clone this repository and cd into it on your terminal
npm install
npm test

jshprz/mock-factory-pattern

Mock-Factory-Pattern in TypeScript

Setup