saga_test.js

// SAGA
export const disconnectPage = function*(pageId) {
  const accessToken = yield call(ensureAccessTokenSaga)

  const { success, data, error } = yield call(disconnectFacebookPage(pageId), accessToken)
  if(success === true) {
    yield put(dataRequest({
      key: 'facebook_page_settings:pages',
      fetcher: fetchFacebookPages,
    }))
  }
}

//TEST
import { disconnectPage } from './disconnectFacebookPage.js'
import { runSaga } from 'redux-saga'
import * as api from 'auth-actions'
import * as credentials from '../../../../apis/credentials.js'

import { DATA_REQUEST } from 'fetch-data-wrapper'
let sandbox
let stubbedFetchFacebookPages
let dispatched = []

describe('fetchDataSaga', () => {
  const config = {
    dispatch: action => dispatched.push(action),
    getState: () => ({ state: 'test' }),
  }

  beforeEach(() => {
    sandbox = sinon.sandbox.create()
    stubbedFetchFacebookPages = sandbox.stub(credentials, 'fetchFacebookPages')
    sandbox.stub(api, 'ensureAccessTokenSaga').callsFake(() => '12345' )
    sandbox.stub(credentials, 'disconnectFacebookPage').callsFake(() => () => ({
      success: true,
    }))
  })

  afterEach(() => {
    sandbox.restore()
    dispatched = []
  })

  it('dispatches correct actions on success', async () => {
    const params = {
      pageId: 'abcd'
    }

    await runSaga(
      config,
      disconnectPage,
      params,
    ).done

    expect(dispatched).to.eql([
      { type: DATA_REQUEST, key: 'facebook_page_settings:pages', fetcher: stubbedFetchFacebookPages },
    ])
  })
})