redux-form/src/__tests__/mapValues.spec.js

A higher order component decorator for forms using Redux and React

import expect from 'expect';
import mapValues from '../mapValues';

describe('mapValues', () => {
  it('should return undefined when given undefined', () => {
    expect(mapValues(undefined, () => null))
      .toBe(undefined);
  });

  it('should return null when given null', () => {
    expect(mapValues(null, () => null))
      .toBe(null);
  });

  it('should call a function on each value', () => {
    expect(mapValues({
      a: 1,
      b: 2,
      c: 3,
      d: 4
    }, value => value * 2))
      .toBeA('object')
      .toEqual({
        a: 2,
        b: 4,
        c: 6,
        d: 8
      });
  });
});