mocha-snapshots

Mocha Snapshots

Snapshot/regression testing for using with Mocha, specially for React+Enzyme users.

* Jest is cool but too slow!

Install it

npm i mocha-snapshots --save

Use it

import { expect } from 'chai';
import { shallow } from 'enzyme';
import MyComponent from './path/to/MyComponent';

describe('<MyComponent />', () => {
  it('should match snapshot', function() { // Arrow functions are not allowed here
    const wrapper = shallow(<MyComponent />)
    expect(wrapper).to.matchSnapshot();
    expect('you can match strings').to.matchSnapshot();
    expect(123).to.matchSnapshot(); // numbers too
    expect({ a: 1, b: { c: 1 } }).to.matchSnapshot(); // or any object
  });
});

Run your tests

Add a require argument to your test script/command

mocha --require mocha-snapshots

Update snapshots

Set an environment variable UPDATE and run your test script:

ex: UPDATE=1 npm test