vcc-ui/_src/object-map.test.js

VCC UI is a collection of React UI Components that can be used for developing front-end applications at Volvo Car Corporation.

import { objectMap } from './object-map';

describe('objectMap()', () => {
  it('performs an immutable maps over an object', () => {
    const mock = {
      foo: 128,
      bar: 256,
    };

    const result = objectMap(x => x * 2)(mock);

    expect(result).toEqual({
      foo: 256,
      bar: 512,
    });

    expect(mock).toEqual({
      foo: 128,
      bar: 256,
    });
  });

  it('curries', () => {
    const mock1 = {
      foo: 128,
      bar: 256,
    };

    const mock2 = {
      foo: 256,
      bar: 512,
    };

    const curried = objectMap(x => x * 2);

    expect(typeof curried).toEqual('function');

    expect(curried(mock1)).toEqual({
      foo: 256,
      bar: 512,
    });

    expect(curried(mock2)).toEqual({
      foo: 512,
      bar: 1024,
    });
  });
});