import expect from 'expect';

import deepDifference from 'utilities/deep_difference';

describe('deepDifference - utility', () => {
  it('returns the difference for 2 un-nested objects', () => {
    const obj1 = { id: 1, first_name: 'Joe', last_name: 'Smith' };
    const obj2 = { id: 1, first_name: 'Joe', last_name: 'Smyth' };

    expect(deepDifference(obj1, obj2)).toEqual({ last_name: 'Smith' });
    expect(deepDifference(obj2, obj1)).toEqual({ last_name: 'Smyth' });
  });

  it('returns the difference for 2 nested objects', () => {
    const obj1 = {
      profile: { id: 1, first_name: 'Joe', last_name: 'Smith' },
      preferences: { email: true, push: false },
      post_ids: [1, 2, 3],
    };
    const obj2 = {
      profile: { id: 1, first_name: 'Joe', last_name: 'Smyth' },
      preferences: { email: false, push: false },
      post_ids: [1, 3],
    };

    expect(deepDifference(obj1, obj2)).toEqual({
      profile: { last_name: 'Smith' },
      preferences: { email: true },
      post_ids: [2],
    });

    expect(deepDifference(obj2, obj1)).toEqual({
      profile: { last_name: 'Smyth' },
      preferences: { email: false },
    });
  });

  it('returns the difference for 1 nested object and 1 non-nested object', () => {
    const obj1 = {
      profile: { id: 1, first_name: 'Joe', last_name: 'Smith' },
      preferences: { email: true, push: false },
      post_ids: [1, 2, 3],
    };
    const obj2 = { profile: 'my profile', preferences: 'my preferences' };

    expect(deepDifference(obj1, obj2)).toEqual(obj1);
    expect(deepDifference(obj2, obj1)).toEqual(obj2);
  });

  it('returns an empty array when comparing an empty array against a non-empty array', () => {
    const obj1 = { pack_name: 'My Pack', label_ids: [] };
    const obj2 = { pack_name: 'My Pack', label_ids: [1, 2] };

    expect(deepDifference(obj1, obj2)).toEqual({ label_ids: [] });
  });
});