twreporter-redux/src/reducers/__test__/topics.test.js

redux actions and reducers for twreporter website

/* global describe, it*/

import {topic, topics} from '../topics'
import types from '../../constants/action-types'
import { expect } from 'chai'

const topic1 = {
  id: 'topic-id-1',
  slug: 'topic-slug-1',
}

const topic2 = {
  id: 'topic-id-2',
  slug: 'topic-slug-2',
}

describe('topic reducer', () => {
  it('should return the initial state', () => {
    expect(
      topic({}, {}),
    ).to.deep.equal({})
  })

  it('should handle GET_A_FULL_TOPIC', () => {
    expect(
      topic({}, {
        type: types.GET_A_FULL_TOPIC,
        payload: topic1,
      }),
    ).to.deep.equal({
      slug: topic1.slug,
      error: null,
    })
  })

  it('should handle ERROR_TO_GET_A_FULL_TOPIC ', () => {
    const err = new Error('error occurs')
    expect(
      topic({
      }, {
        type: types.ERROR_TO_GET_A_FULL_TOPIC,
        error: err,
      }),
    ).to.deep.equal({
      error: err,
    })
  })
})

describe('topics reducer', () => {
  it('should return the initial state', () => {
    expect(
      topics({}, {}),
    ).to.deep.equal({})
  })

  it('should handle GET_TOPICS', () => {
    expect(
      topics({
      }, {
        type: types.GET_TOPICS,
        payload: {
          items: [topic1, topic2],
          total: 10,
        },
      }),
    ).to.deep.equal({
      items: [topic1.slug, topic2.slug],
      total: 10,
      error: null,
    })
  })

  it('should handle ERROR_TO_GET_TOPICS', () => {
    const err = new Error('error occurs')
    expect(
      topics({
        items: [topic1.slug, topic2.slug],
        total: 10,
        error: null,
      }, {
        type: types.ERROR_TO_GET_TOPICS,
        error: err
      }),
    ).to.deep.equal({
      items: [topic1.slug, topic2.slug],
      total: 10,
      error: err,
    })
  })
})