Example redux-cycle-middleware test

test.js

import { createCycleMiddleware } from 'redux-cycle-middleware';
import configureMockStore from 'redux-mock-store'
import expect from 'expect' // You can use any testing library

describe('Redux cycle middleware', () => {
  it('dispatches a PING to see whether the middleware dispatches a PONG', () => {
    function main(sources) {
      const pong$ = sources.ACTION
        .filter(action => action.type === 'PING')
        .mapTo({ type: 'PONG' });

      return {
        ACTION: pong$
      }
    }
    
    const cycleMiddleware = createCycleMiddleware(main, {});
    const middlewares = [ cycleMiddleware ]
    const mockStore = configureMockStore(middlewares)

    const expectedActions = [
      { type: 'PING' },
      { type: 'PONG' }
    ]
    const store = mockStore({ todos: [] })

    store.dispatch({ type: 'PING' })
    
    expect(store.getActions()).toEqual(expectedActions)
  })
})