@coriolis/coriolis/src/test/utils.js

Event sourced effect management

import { Observable, merge } from 'rxjs'
import { FIRST_EVENT_TYPE } from '..'

export const matchSubject = sinon.match({
  subscribe: sinon.match.func,
  next: sinon.match.func,
})

export const matchObservable = sinon.match({
  subscribe: sinon.match.func,
})

export const matchFirstEvent = sinon.match({
  type: FIRST_EVENT_TYPE,
})

export const matchCoriolisEffectAPI = sinon.match({
  event$: matchObservable,
  dispatch: sinon.match.func,
  addSource: sinon.match.func,
  addLogger: sinon.match.func,
  addEffect: sinon.match.func,
  withProjection: sinon.match.func,
  pastEvent$: matchObservable,
})

export const matchCoriolisAggregatorSetupAPI = sinon.match({
  useProjection: sinon.match.func,
  useEvent: sinon.match.func,
  useState: sinon.match.func,
  lazyProjection: sinon.match.func,
  setName: sinon.match.func,
  useValue: sinon.match.func,
})

export const createTrackedObservable = (observable) => {
  const unsubscribeSpy = sinon.spy()
  const subscribeSpy = sinon.stub().returns(unsubscribeSpy)

  const spyObservable = merge(observable, Observable.create(subscribeSpy))

  return {
    spyObservable,
    subscribeSpy,
    unsubscribeSpy,
  }
}

export const randomEventsObservable = Observable.create((observer) => {
  let timeout
  const next = () => {
    observer.next({
      type: Math.random().toString(36).substring(2, 15),
    })
    timeout = setTimeout(next, Math.random() * 10)
  }
  next()

  return () => clearTimeout(timeout)
})