chai-jest-mocks
TypeScript icon, indicating that this package has built-in type declarations

1.2.4 • Public • Published

chai-jest-mocks

npm version CircleCI Coverage Status

Chai plugin that adds assertions for jest mock functions

NOTE this is still very much a work in progress, more matchers and better documentation (and tests) are coming!

Installation

On the command line:

$ npm install --save-dev chai-jest-mocks

Usage

First, tell chai that you want to use chai-jest-mocks

const chai = require('chai');
const chaiJestMock = require('chai-jest-mocks');
 
chai.use(chaiJestMock);

Then you will have access to the new assertions:

// Expect a mock to be called
expect(mockFn).to.have.beenCalled();
 
// Expect a mock to have been called a certain number of times
expect(mockFn).to.have.beenCalledTimes(4);
 
// Expect a mock to have been called with specific arguments
expect(mockFn).to.have.beenCalledWith('hello', 'world');
 
// Expect a mock to have been last called with specific arguments
expect(mockFn).to.have.beenLastCalledWith('hello', 'world');
 
// Expect a mock to have been nth (in this case, second) called with specific arguments
expect(mockFn).to.have.beenNthCalledWith(2, 'hello', 'world');
 
// Expect a mock to have returned succesfully (i.e, not throw)
expect(mockFn).to.have.returned();
 
// Expect a mock to have returned succesfully a certain number of times
expect(mockFn).to.have.returnedTimes(3);

Package Sidebar

Install

npm i chai-jest-mocks

Weekly Downloads

295

Version

1.2.4

License

MIT

Unpacked Size

15.1 kB

Total Files

22

Last publish

Collaborators

  • caffeinatedcm