vcc-ui/_src/merge.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 { merge } from './merge';

describe('merge()', () => {
  it('performs shallow level merge', () => {
    const target = {
      foo: 'hello world',
      bar: 123,
      baz: () => {},
      qux: {
        boz: 321,
      },
    };

    const result = merge(target, {
      foo: 'overwritten',
      baz: 'also-overwritten',
    });

    expect(result).toEqual({
      foo: 'overwritten',
      bar: 123,
      baz: 'also-overwritten',
      qux: {
        boz: 321,
      },
    });
  });

  it('performs deep level merge', () => {
    const target = {
      foo: 'hello world',
      bar: 123,
      qux: {
        boz: 321,
      },
    };

    const result = merge(target, {
      qux: {
        boz: 'new-boz',
        baz: 'baz',
      },
    });

    expect(result).toEqual({
      foo: 'hello world',
      bar: 123,
      qux: {
        boz: 'new-boz',
        baz: 'baz',
      },
    });
  });
});