bdd-unit-test.js

/**
 * Scenario:
 * The user requests an account sync
 * Given the account
 * And the institution of account
 * And the user of account
 * When the user requests the account sync
 * Then a sync is scheduled
 * And the sync scheduled event is created
 */

const getAccountRequestedToSync = () => ({
  waiting: false,
  isWaiting() {
    return this.waiting
  },
  scheduleSync() {
    this.waiting = true
  },
  events: {
    syncScheduled: {
      create() {
        return {
          type: 'SYNC_SCHEDULED'
        }
      }
    }
  },
})

const getInstitutionOfAccount = () => ({})

const getUserOfAccount = () => ({})

const account = getAccountRequestedToSync()
const institution = getInstitutionOfAccount(account)
const user = getUserOfAccount(account)

console.assert(!account.isWaiting(), 'Expected waiting to be falsy, received truthy')
account.scheduleSync(institution, user)
console.assert(account.isWaiting(), 'Expected waiting to be truthy, received falsy')

const syncScheduled = account.events.syncScheduled.create({ 
  account, 
  institution, 
  user 
})

console.assert(syncScheduled, 'Expected syncScheduled to be truthy, received falsy')