WikiEducationFoundation/WikiEduDashboard

import deepFreeze from 'deep-freeze';
import '../testHelper';
import reducer from '../../app/assets/javascripts/reducers/did_you_know.js';
import { RECEIVE_DYK } from '../../app/assets/javascripts/constants';

describe('Did you know reducer menu reducer', () => {
  test('should return the initial state', () => {
    const initialState = {
      articles: [],
      sortKey: null,
      loading: true
    };

    expect(reducer(undefined, {})).toEqual(initialState);
  });

  test('should update array with new did you know articles', () => {
    const newArticles = [{ title: 'new-1' }, { title: 'new-2' }];
    const oldArticles = [{ title: 'old-1' }, { title: 'old-2' }];

    const initialState = {
      articles: oldArticles,
      sortKey: null,
      loading: true
    };
    deepFreeze(initialState);

    expect(
      reducer(initialState, {
        type: RECEIVE_DYK,
        payload: {
          data: { articles: newArticles }
        }
      })
    ).toEqual({
      articles: newArticles,
      sortKey: null,
      loading: false
    });
  });
});